2012 Air Monitoring
Network Review

Prepared by the
Air Monitoring Division
2145 S. 11th Ave Suite 170
Phoenix, AZ 85007

ACKNOWLEDGEMENTS
In 2012, the Maricopa County Air Quality Department’s Air Monitoring Division maintained 24
ambient air monitoring sites throughout Maricopa County. The Air Monitoring Division now operates
with a full staff with some technicians pulling double duty in both ambient monitoring and mobile
monitoring.
The department would especially like to thank all of its air monitoring staff for the excellent job they
do in maintaining Maricopa County’s air monitoring network. They are Ben Davis, Gary Ensminger,
Robert Dyer, Ronald Pope, Casey Bryan, John Neff, Michael Perkins, Tom Shorb, Chris Hernandez,
Hugh Tom, David Farganus, Daniel Daniels, Reynaldo Santillano, Larry Seals, Alex Herrera, Tom
Dubishar and David Dubiel.
In addition, the assistance of other agencies which provided data and helpful comments to this review
is gratefully acknowledged. These include Arizona Department of Environmental Quality (ADEQ),
Pinal County Air Quality Control District (PCAQCD) and the Maricopa Association of Governments
(MAG).

2012 Maricopa County Air Quality Department Air Monitoring Division staff

2012 Air Monitoring Network Review

1

Maricopa County Air Quality Department

Table of Contents
ACKNOWLEDGEMENTS ................................................................................................................................................... 1
ABSTRACT ............................................................................................................................................................................ 5
DEFINITION OF TERMS .................................................................................................................................................... 6
CRITERIA POLLUTANT INFORMATION...................................................................................................................... 9
ABSTRACT OF POLLUTANTS .................................................................................................................................................. 9
CAUSES AND CHARACTERISTICS OF POLLUTANTS................................................................................................................. 9
Carbon Monoxide: ............................................................................................................................................................ 9
Lead: ................................................................................................................................................................................. 9
Nitrogen Dioxide: ........................................................................................................................................................... 10
Ozone: ............................................................................................................................................................................ 10
Particulate Matter: .......................................................................................................................................................... 10
Sulfur Dioxide: ............................................................................................................................................................... 11
NATIONAL AMBIENT AIR QUALITY STANDARDS ................................................................................................................ 11
ABSTRACT OF MARICOPA COUNTY AIR QUALITY DEPARTMENT POLLUTION MONITORING STRATEGIES ............ 12
NETWORK DESIGN .......................................................................................................................................................... 13
MONITORING OBJECTIVES .................................................................................................................................................. 13
MONITORING SITE TYPES.................................................................................................................................................... 13
MONITORING SPATIAL SCALES ........................................................................................................................................... 13
LOCATING MONITORS ......................................................................................................................................................... 14
OVERVIEW OF THE MARICOPA COUNTY AIR QUALITY DEPARTMENT’S AIR MONITORING NETWORK ............................... 15
2012 SUMMARY OF NETWORK RESULTS AND REQUIRED INFORMATION ................................................... 18
DATA COMPLETENESS ........................................................................................................................................................ 18
CRITERIA POLLUTANT SUMMARY ....................................................................................................................................... 19
Carbon Monoxide (CO).................................................................................................................................................. 19
Lead (Pb) ........................................................................................................................................................................ 21
Nitrogen Dioxide (NO2) ................................................................................................................................................ 23
Ozone (O3)...................................................................................................................................................................... 24
Particulate Matter <=10 Microns (PM10)........................................................................................................................ 27
Particulate Matter <=2.5 Microns (PM2 5) ...................................................................................................................... 30
Sulfur Dioxide (SO2) ...................................................................................................................................................... 34
2012 NAAQS EXCEEDANCE AND VIOLATION SUMMARY ................................................................................................... 36
2012 OZONE EXCEEDANCE AND VIOLATION DETAILS ........................................................................................................ 36
2012 VIOLATIONS OF THE 24-HOUR PM10 STANDARD ........................................................................................................ 41
EXCEPTIONAL EVENTS ........................................................................................................................................................ 41
2012 EXCEEDANCES OF THE 24-HOUR PM2 5 STANDARD .................................................................................................... 42
POLLUTION TRENDS ............................................................................................................................................................ 43
Carbon Monoxide ........................................................................................................................................................... 43
Nitrogen Dioxide ............................................................................................................................................................ 43
Ozone ............................................................................................................................................................................. 44
Particulates ..................................................................................................................................................................... 44
Sulfur Dioxide ................................................................................................................................................................ 46
SPECIAL PROJECTS AND NETWORK CHANGES .................................................................................................... 47
SEASONAL MONITORS......................................................................................................................................................... 47
THE CONSIDERATION OF ADDITIONAL SITES/MONITORS .................................................................................................... 47
LEAD MONITORING ............................................................................................................................................................. 47
OTHER NETWORK CHANGES/SPECIAL PROJECTS/COMMENTS............................................................................................. 48

AIR QUALITY FORECASTING ...................................................................................................................................... 48

AIR MONITORING WEBSITE ....................................................................................................................................... 48
MOBILE MONITORING PROGRAM ........................................................................................................................................ 48
NEAR-ROAD NO2 MONITORING .......................................................................................................................................... 48
RAPID RESPONSE NOTIFICATION SYSTEM ........................................................................................................................... 51
EMERGENCY RESPONSE NOTIFICATION SYSTEM ................................................................................................................. 51
2012 Air Monitoring Network Review

2

Maricopa County Air Quality Department

ADDITIONAL COMMENTS ............................................................................................................................................. 53
ARIZONA DEPARTMENT OF ENVIRONMENTAL QUALITY NETWORK .................................................................................... 53
EPA OZONE MAPPING ........................................................................................................................................................ 53
REFERENCES ..................................................................................................................................................................... 55
APPENDIX I - MONITORING SITE DETAILS (PHOTOS AND SPECIFIC INFORMATION) .............................. 56
BUCKEYE (BE) (04-013-4011) ............................................................................................................................................ 57
CAVE CREEK (CC) (04-013-4008) ...................................................................................................................................... 58
CENTRAL PHOENIX (CP) (04-013-3002) ............................................................................................................................. 59
DEER VALLEY (DV) (04-013-4018) .................................................................................................................................... 60
DURANGO COMPLEX (DC) (04-013-9812) .......................................................................................................................... 61
DYSART (DY) (04-013-4010) ............................................................................................................................................. 62
FALCON FIELD (FF) (04-013-1010)..................................................................................................................................... 63
FOUNTAIN HILLS (FH) (04-013-9704) ................................................................................................................................ 64
GLENDALE (GL) (04-013-2001).......................................................................................................................................... 65
GREENWOOD (GR) (04-013-3010) ...................................................................................................................................... 66
HIGLEY (HI) (04-013-4006) ................................................................................................................................................ 67
HUMBOLDT MOUNTAIN (HM) (04-013-9508)..................................................................................................................... 68
MESA (ME) (04-013-1003) ................................................................................................................................................. 69
NORTH PHOENIX (NP) (04-013-1004)................................................................................................................................. 70
PINNACLE PEAK (PP) (04-013-2005) .................................................................................................................................. 71
RIO VERDE (RV) (04-013-9706) ......................................................................................................................................... 72
SOUTH PHOENIX (SP) (04-013-4003) .................................................................................................................................. 73
SOUTH SCOTTSDALE (SS) (04-013-3003) ........................................................................................................................... 74
TEMPE (TE) (04-013-4005)................................................................................................................................................. 75
WEST 43RD AVENUE (WF) (04-013-4009) ........................................................................................................................... 77
WEST PHOENIX (WP) (04-013-0019) .................................................................................................................................. 78
ZUNI HILLS (ZH) (04-013-4016)......................................................................................................................................... 79
APPENDIX II - EPA REQUIRED DATA ......................................................................................................................... 80
REQUIRED GENERAL STATEMENT REGARDING CHANGES TO THE PM2 5 NETWORK............................................................ 81
NOTES REGARDING APPENDIX DATA ................................................................................................................................... 81
APPENDIX III - PUBLIC NOTICE AND COMMENT INFORMATION .................................................................. 106
PUBLIC NOTICE PERIOD .................................................................................................................................................... 106
NEWS RELEASE ................................................................................................................................................................. 106

List of Tables

Table 1 National Ambient Air Quality Standards .................................................................................................................. 11
Table 2 Site Monitoring Objectives ....................................................................................... Error! Bookmark not defined.
Table 3 Spatial Measurement Scales ....................................................................................... Error! Bookmark not defined.
Table 4 Maricopa County Ambient Air Monitoring Sites for 2012 ...................................................................................... 16
Table 5 Criteria Pollutants Monitored, by Site and Network ................................................................................................. 16
Table 6 Site Location ............................................................................................................................................................. 17
Table 7 Site Instrument Setup ................................................................................................................................................ 18
Table 8 2012 Criteria Pollutant Data Completeness............................................................................................................... 18
Table 9 2012 8-hour Average Carbon Monoxide Summary .................................................................................................. 20
Table 10 CO Data Required by EPA .................................................................................................................................. 20
Table 11 2012 Lead Summary ............................................................................................................................................... 21
Table 12 Lead Data Required by EPA ............................................................................................................................... 22
Table 13 2012 Nitrogen Dioxide Summary ........................................................................................................................... 23
Table 14 NO2 Data Required by EPA ................................................................................................................................. 24
Table 15 2012 8-hour Average Ozone Summary ................................................................................................................... 25
Table 16 3 Year Average of 8-Hour Ozone ........................................................................................................................... 26
Table 17 Ozone Data Required by EPA ............................................................................................................................. 26
Table 18 2012 PM10 Summary ............................................................................................................................................... 28
Table 19 PM10 Data Required by EPA ............................................................................................................................... 29
2012 Air Monitoring Network Review

3

Maricopa County Air Quality Department

Table 20 2012 PM2 5 Summary (FRM Filter-based Monitors) ............................................................................................... 31
Table 21 2012 PM2 5 Data Summary (FEM Continuous Monitors) ....................................................................................... 31
Table 22 2012 PM2 5 3-Year Averages of 98th Percentile (FRM Monitors) .......................................................................... 31
Table 23 2012 PM2 5 3-Year Averages of 98th Percentile (FEM Monitors) .......................................................................... 32
Table 24 PM2.5 SLAMS Data Required by EPA ................................................................................................................ 32
Table 25 2012 Sulfur Dioxide Summary................................................................................................................................ 34
Table 26 SO2 Data Required by EPA ................................................................................................................................. 35
Table 27 2012 NAAQS Exceedances and Violation Summary ............................................................................................. 36
Table 28 2012 Ozone 8-hour Average Exceedance Details ................................................................................................... 36
Table 29 2012 Ozone Violations ............................................................................................................................................ 39
Table 30 2012 PM10 24-hour Average Exceedance Details ................................................................................................... 39
Table 31 Violations of the 24-hour PM10 Standard ................................................................................................................ 41
Table 32 2012 PM2.5 Exceedances........................................................................................................................................ 42
Table 33 Seasonal Monitors ................................................................................................................................................... 47
Table 34 Air Quality Index .................................................................................................................................................... 54

List of Figures

Figure 1 Maricopa County Air Monitoring Sites for 2012 ..................................................................................................... 15
Figure 2 2012 Carbon Monoxide Monitoring Sites ................................................................................................................ 19
Figure 3 2012 Lead Monitoring Sites ..................................................................................................................................... 21
Figure 4 2012 Nitrogen Dioxide Monitoring Sites ............................................................................................................. 23
Figure 5 2012 Ozone Monitoring Sites .................................................................................................................................. 24
Figure 6 2012 PM10 Monitoring Sites (includes continuous and non-continuous sites)......................................................... 27
Figure 7 2012 PM2 5 Monitoring Sites (continuous and non-continuous) .............................................................................. 30
Figure 8 2011 Sulfur Dioxide Monitoring Sites ..................................................................................................................... 34
Figure 9. Aerial photograph and street view of proposed monitoring Site #1. .............................................................. 50
Figure 10 EPA AIRNow Website .......................................................................................................................................... 53

List of Charts

Chart 1 2010-2012 8-hr Avg. Carbon Monoxide Maximum Values ...................................................................................... 43
Chart 2 2010-2012 Nitrogen Dioxide Annual Average Readings .......................................................................................... 43
Chart 3 2010-2012 Ozone 4th High 8-hr Average ................................................................................................................. 44
Chart 4 2010-2012 PM10 24-hr Average Maximum Values ................................................................................................... 44
Chart 5 2010-2012 PM10 Annual Average ............................................................................................................................. 45
Chart 6 2010-2012 PM2 5 Annual Average ............................................................................................................................. 45
Chart 7 2010-2012 PM2 5 98th Percentile ................................................................................................................................ 46
Chart 8 2010-2012 Sulfur Dioxide Annual Average .............................................................................................................. 46

2012 Air Monitoring Network Review

4

Maricopa County Air Quality Department

ABSTRACT
This 2012 Annual Air Monitoring Network Review is respectfully submitted by the Maricopa County
Air Quality Department (MCAQD) to the United States Environmental Protection Agency (US EPA)
Region 9. The Air Monitoring Network Review evaluates the adequacy of the ambient air monitoring
network with respect to the monitoring objectives and spatial scales. This annual assessment is
required by 40 CFR Part 58, Subpart B. Network changes, special projects, and 3-year data summaries
are included in the review.
This network review is also preliminary to our annual data certification with the US EPA and helps us
assess the quality of our data before submitting for data certification. This network review has the
secondary purpose of informing the public of air pollutants that can affect their health, how MCAQD
monitors these pollutants, and what the actual readings are, so that our citizens can make informed
decisions regarding their lifestyles.

2012 Air Monitoring Network Review

5

Maricopa County Air Quality Department

DEFINITION OF TERMS
ADEQ:

Arizona Department of Environmental Quality.

AQI:

Air Quality Index. An index that is applicable to all pollutants which show the
concentration of pollutant relative to its respective standard. When the AQI
reaches 101 the concentration has exceeded the NAAQS.

AQS:

Environmental Protection Agency’s Air Quality System

Attainment:

This refers to the NAAQS used to comply with the federal Clean Air Act. After
several years of no violations of the NAAQS, the EPA can classify the area as in
attainment for that pollutant.

AWT:

Average Weekday Traffic count.

BAM:

Beta Attenuation Monitor. A continuous particulate measuring instrument used
by MCAQD to measure PM10.

CFR:

Code of Federal Regulations.

Class I:

Federally designated park or wilderness area with mandated visibility protection.

CO:

Carbon monoxide.

Continuous monitoring:

A method of monitoring air pollutants that is continually measuring the quantity
of the pollutant, either gaseous or particulate. Continuous monitors can be used
to obtain real-time or short-term averages of pollutants.

Criteria Pollutants:

Six pollutants (CO, Lead, NO2, O3, Particulates, and SO2) that have NAAQS
established by the US EPA.

Delta T:

Difference between two levels of temperature measurements. Delta T is
measured in the MCAQD network at heights of 2 and 10 meters. A higher
temperature at the upper level indicates a temperature inversion.

Design Value:

A design value is a statistic that describes the air quality status of a given area
relative to the level of the NAAQS. For a concentration-based standard, the air
quality design value is simply the standard-related test statistic. The design value
of a pollutant monitoring network is the highest sample value in the network
used to compare to the NAAQS; e.g. the 24-hour PM2 5 design value for the
network is the monitor with the highest 3-year average of the 98th percentile.

EPA:

U. S. Environmental Protection Agency.

Exceptional Events:

An uncontrollable event caused by natural sources of pollution or an event that is
not expected to recur at a given location. The ADEQ makes the determination of
which events to classify as exceptional; they then petition the EPA for
acceptance of the classification. If the EPA accepts the petition, the measured
pollution event will not be used in determination of compliance with the
NAAQS.

FDMS-TEOM:

Filter Dynamics Measurement System-Tapered Element Oscillating
Microbalance. A continuous particulate measuring instrument used by MCAQD
to measure PM2 5.

2012 Air Monitoring Network Review

6

Maricopa County Air Quality Department

FEM:

Federal Equivalency Method. An official method, i.e. equipment and procedure,
of monitoring air pollution that has been determined to produce results similar to
the Federal Reference Method (FRM).

Filter-based Monitor

A method of monitoring particulate pollution that involves exposing a preweighed filter to a specific flow volume of air to capture the particulates in the
air. The filters are then post-weighed to determine the weight of particulates per
volume, e.g. µg/m3. Filter-based monitors used by MCAQD are all FRM
monitors.

FRM:

Federal Reference Method. An official method, i.e. equipment and procedure, of
monitoring air pollution that has been tested and determined to produce results
that accurately measure air pollution with acceptable precision. These methods
are the baseline that all other methods, e.g. Federal Equivalency Methods
(FEM), refer to.

HAPs

Hazardous air pollutants. An air-born chemical that has been listed in the federal
Clean Air Act and has an associated standard or process requirement determined
for it.

MAG:

Maricopa Association of Governments

MCAQD:

Maricopa County Air Quality Department.

µg/m3:

Microgram per cubic meter.

MSA:

Metropolitan Statistical Area. A geographical area designated by the federal
government based on the concept of a core area with a large population nucleus,
plus adjacent communities having a high degree of economic and social
integration with that core. The MCAQD operates within the Phoenix-Mesa
MSA which includes portions of Maricopa and Pinal County.

NAAQS:

National Ambient Air Quality Standards. A health and welfare-based standard
that is set by the US EPA to qualify allowable levels of criteria pollutants.

NCORE:

National Core Multi-Pollutant Site. A national network of multi-pollutant
monitoring sites used to represent the nation as a whole. There are currently ~75
NCORE sites (1-3 per state plus Washington DC, Virgin Islands, and Puerto
Rico) located in both urban and rural areas.

NO2:

Nitrogen dioxide.

NOX:

Nitrogen oxides. Sum of nitric oxide (NO), NO2, and other nitrogen-containing
compounds.

O3:

Ozone.

Pb:

Lead.

PM:

Particulate matter. Material suspended in the air in the form of minute solid
particles or liquid droplets.

PM2.5:

Particulate matter of 2.5 Microns in diameter or smaller

PM10:

Particulate matter of 10 Microns in diameter or smaller.

2012 Air Monitoring Network Review

7

Maricopa County Air Quality Department

PPB:

Parts per billion.

PPM:

Parts per million.

Primary Standard:

One portion of the NAAQS. These standards are designed to protect the public
health.

Secondary Standard:

One portion of the NAAQS.
environment.

SIP:

State Implementation Plan. SIPs are a collection of state and local regulations
and plans to achieve healthy air quality under the Clean Air Act.

SLAMS:

State and Local Air Monitoring Station. The SLAMS consist of a network of
approximately 5,000 monitoring stations nationwide whose size and distribution
is largely determined by the needs of State and local air pollution control
agencies to meet their respective State implementation plan (SIP) requirements.
Other types of monitoring stations include NCORE (national core) and SPM
(special purpose) monitors. Maricopa County does not currently operate any
NCORE sites and only operates one SPM site.

SO2:

Sulfur dioxide.

SPM:

Special purpose monitor. Special Purpose Monitoring Stations provide for
special studies needed by the State and local agencies to support State
implementation plans and other air program activities. The SPMs are not
permanently established and can be adjusted easily to accommodate changing
needs and priorities.

SSI:

Size Selective Inlet. SSI High Volume Samplers are filter-based instruments
used by MCAQD to measure PM10.

TEOM

Tapered Element Oscillating Microbalance. A continuous particulate measuring
instrument used by MCAQD to measure PM10.

VOC:

Volatile organic compounds. VOCs are chemical compounds that can easily
vaporize and enter the atmosphere. There are many natural and artificial sources
of VOCs; solvents and gasoline make up some of the largest artificial sources.
VOCs will react with NOx in the presence of sunlight to create ground-level
ozone pollution.

2012 Air Monitoring Network Review

8

These standards are designed to protect the

Maricopa County Air Quality Department

CRITERIA POLLUTANT INFORMATION
Abstract of Pollutants
Certain air pollutants, called “criteria air pollutants,” are common throughout the United States. These
pollutants can cause health problems, harm the environment, and cause property damage. These
criteria pollutants are so named since the US EPA has regulations, called the National Ambient Air
Quality Standards (NAAQS), on allowable levels of these substances using health-based criteria. One
set of limits, called “primary standards,” protect health, while another set of “secondary standards”, are
designed to protect property and the environment. The US EPA names the following pollutants as
criteria pollutants: carbon monoxide (CO), lead (Pb), nitrogen dioxide (NO2), ozone (O3), particulates
(PM10 & PM2.5), and sulfur dioxide (SO2). MCAQD operates monitors for all of the criteria pollutants.
Causes and Characteristics of Pollutants
Carbon Monoxide:
CO is the most widely distributed and most commonly occurring air pollutant. Total emissions of CO to the
atmosphere exceed all other pollutants combined, on a weight basis. Fortunately, CO does not persist in the
atmosphere, but is quickly converted to carbon dioxide (CO2). CO can reach dangerous levels in localized areas
or hotspots such as heavily traveled intersections or city streets. In addition, CO has been implicated in ozone
formation. Most people are familiar with CO and are aware that automobiles produce this deadly odorless and
colorless gas. In Maricopa County, more than 70% of all anthropogenic CO comes from motor vehicle
emissions. In fact, this gas is produced almost anytime something is burned. All substances that are living
(plants, animals) or that were once living (wood, coal, oil, gasoline) are composed of carbon compounds. If
these substances are burned in the presence of sufficient oxygen, the carbon is converted to CO2 gas. If, as is
often the case, not enough oxygen is present, carbon monoxide gas is produced.
Carbon monoxide’s danger lies in the extremely strong affinity that hemoglobin has for it. Hemoglobin, the
special oxygen-transporting material in the red blood cell, has approximately 200 times stronger affinity for CO
than for oxygen. Therefore, if both CO and O2 are present the bonding between the CO and hemoglobin will
prevent the O2 from exchanging within a person’s body. This puts a heavy burden on people with heart disease
and can aggravate angina, but even healthy people can suffer from harmful side effects from CO.
In 2012 Maricopa County achieved its 16th consecutive year of compliance with the eight-hour CO standard.

Lead:
Lead is a metal found naturally in the environment as well as in manufactured products. The major sources of
lead emissions have historically been motor vehicles (such as cars and trucks) and industrial sources. Due to the
phase out of leaded gasoline, metals processing is the major source of lead emissions to the air today. The
highest levels of lead in air are generally found near lead smelters. General aviation airports are also a
significant source of lead, as general aviation fuel still contains lead additives. Other stationary sources are
waste incinerators, utilities, and lead-acid battery manufacturers. In the early 1970s, EPA set national
regulations to gradually reduce the lead content in gasoline. In 1975, unleaded gasoline was introduced for
motor vehicles equipped with catalytic converters. EPA banned the use of leaded gasoline in highway vehicles
in December 1995. Primarily as a result of EPA's regulatory efforts to remove lead from gasoline, levels of lead
in the air have decreased by 94 percent between 1980 and 1999.
Following the removal of lead from automotive fuel, levels of airborne lead in Maricopa County were
drastically reduced. Because concentrations were consistently below national levels, Maricopa County was
allowed to discontinue ambient air monitoring for lead in 1997. However, recent changes in the lead monitoring
2012 Air Monitoring Network Review

9

Maricopa County Air Quality Department

regulations have brought the need to resume monitoring activities in Maricopa County. In July 2010, MCAQD
opened a new lead monitoring site at Deer Valley airport. Deer Valley airport is the busiest general aviation
airport in the county, and thus the largest expected source of lead emissions. Results from the last twelve
months of monitoring have shown that ambient levels of lead are still well below the air quality standard, even
with the much more stringent regulations.

Nitrogen Dioxide:
NO2 belongs to a family of highly reactive gases called nitrogen oxides. These gases are formed when fuel is
burned at high temperatures, and are emitted primarily from automobile exhaust and power plants. Exposure to
nitrogen dioxide can irritate the lungs and lower resistance to respiratory infections, particularly in people with
existing respiratory illness such as asthma. Maricopa County is currently in attainment status for NO2. Maricopa
County will be engaging in near-road monitoring to ensure compliance with the new 1-hour NO2 standard.

Ozone:
O3 is a naturally occurring compound in which three oxygen atoms combine together. This is an unstable
combination, and ozone is continually going through a natural cycle of being formed and then converting back
to the more stable “normal” double oxygen compound (O2). The cycle occurs fairly rapidly. In the stratosphere
(six miles and more above the earth), naturally occurring ozone has a beneficial effect of screening out harmful
ultraviolet light from the sun. However, ground-level ozone is a pollutant and is a component of the regional
smog that affects the valley. Ozone is not directly emitted into the air, but rather forms in a complex reaction
that involves heat, sunlight, and a “soup” of toxic pollutants, especially volatile organic compounds (VOCs).
Some of the most common sources of VOCs are gasoline vapors, chemical solvents, and combustion products of
fuels and consumer products. Ozone is created by sunlight acting on nitrates (NOX) and VOCs from motor
vehicles and stationary sources, and can be carried hundreds of miles from their origins. Ozone affects the
respiratory system in people and animals, and also affects the growth of plants.
Maricopa County is currently in non-attainment for Ozone pollution, although the number of violations of the
standard had been decreasing in recent years. However, in February 2008, the EPA lowered the NAAQS for
ozone from 0.08 ppm to 0.075 ppm. Many of the ozone monitoring sites were in borderline compliance with the
older standard and now are exceeding the new standard. Strategies will have to be developed to lower ambient
ozone levels into compliance with the new standard, improving air quality for all.

Particulate Matter:
Particulate matter is the term for solid or liquid particles found in the air. Particle pollution is made up of a
number of components, including acids (such as nitrates and sulfates), organic chemicals, metals, and soil or
dust particles. While some particles are large or dark enough to be seen as soot or smoke, others can only be
seen through an electron microscope. In 1987 the EPA replaced the Total Suspended Particulates (TSP) air
quality standard with a standard for PM10 (particles measuring ten microns or less). Health research studies
have found that PM10 has the ability to reach the lower regions of the respiratory tract, and thus can affect the
respiratory system in both humans and animals.
The size of particles is directly linked to their potential for causing health problems. EPA is concerned about
particles that are 10 micrometers in diameter or smaller because those are the particles that generally pass
through the throat and nose and enter the lungs. Once inhaled, these particles can affect the heart and lungs and
cause serious health effects. EPA groups particle pollution into two categories:
•

"Coarse particles," such as those found near roadways and dusty industries, range in size from 2.5 to 10
microns in diameter.

2012 Air Monitoring Network Review

10

Maricopa County Air Quality Department

•

"Fine pait icles," such as tl1ose fotmd in smoke and haze, have diameters smaller than 2.5 microns. These
particles can be directly emitted from sources such as forest fires, or they can form when gases emitted
from power plants, industries and automobiles react in the air.

Maricopa C01mty is cmTently in non-attainment. for PM 10, but. is in attainment. for PM2 5

Sulfur Dioxide:
S02 is emitted (in gaseous form) largely from burning high-sulfur coal, oil, and diesel fuel. Because this gas is
usually folllld in association with paiticulate pollution, as S02 is the precursor for fine sulfate paiticles,
separating the health effects of these two pollutants is difficult. Together S02 ai1d PM2 5 make up a major
portion of the pollutant load in many cities, acting sepai·ately and in concert to threaten public health. S02
contributes to respiratory illness, particularly in children and the elderly, and aggravates existing heait and Imig
diseases. S02 contributes to tl1e formation of acid rain, and it contributes to the formation of atmospheric
particles that cause visibility impairment, most noticeably in national pai·ks. S02 and the pollutants fonned from
S02, such as sulfate part icles, can be transported over long distances and deposited far from the point of
origin. This means that problems with S02 ar·e not confined to areas where it is emitted.
Maricopa County is in attainment for Sulfur Dioxide.

National Ambient Air Quality Standards
The EPA Office of Air Quality Planning ai1d Standards (OAQPS) manages programs to improve air quality in
areas where the cmTent quality is m1acceptable and to prevent deterioration in areas where the air is relatively
free of contamination. To accomplish this task, OAQPS establishes the National Ambient Air Quality Standard
(NAAQS) for each of the criteria pollutants (see Table 1).
There are two types of standar·ds. Primary standards protect against adverse health effects; secondary standards
protect against. welfare effects, such as damage to farm crops and vegetation and/or damage to buildings.
Because different pollutants have different effects, the NAAQS are also different. Some pollutants have
standards for both long-term and short-term averaging times. The short-term standat·ds ar·e designed to protect
against acute, or short-term, health effects, while the long-term star1dar·ds are established to protect against
chronic health effects. Table 1 lists the NAAQS for the six criteria pollutants.

Table 1 National Ambient Air Quality Standards
Pollutant

Primary/
Secondary I

Carbon Monoxide

primary

Lead

primary I
secondary

Rolling 3 month
average

primary
Nitrogen Dioxide
Ozone

Particle
Pollution

PM2.s
PM10

Averaging Time

primary I
secondary
primary and
secondary
primary
secondary
Primary I
secondary
primary I

2012 Air Monitoring Network Review

Level

Form

8-hour

9 ppm

1-hour

35 ppm

Not to exceed one per year on avg.
over 3 years

0.15
µg/m3

Not to exceed one per year on avg.
over 3 years

1-hour

100 ppb

98th percentiles, avg. over 3 years

Annual

53 ppb

8-hour

0.075 ppm

Annual
Annual

12 µg/m 3
15 µg/m 3
35 µg/m 3

~nnual

Mean

3 year avg. of the fourth high 8-hr
avg. daily max.
3 year avg. of the annual means
3 year avg. of the annual means

3 yea r avg. of the 98th percentiles
3
150 µg/m Not to be exceeded more than once

24-hour
24-hour
11

Maricopa County Air Quality Dep artment

secondary

Sulfur Dioxide

primary

1-hour

75 ppb

secondary

3-hour

0.5 ppm

per year on average over 3 years
99th percentile of 1-hour daily max.,
averaged over 3 years
Not to exceed one per year

Abstract of MARICOPA COUNTY AIR QUALITY DEPARTMENT Pollution Monitoring
Strategies
MCAQD monitors for these criteria pollutants by maintaining twenty-four ambient air-monitoring sites
throughout Maricopa County. The dates that the sites were established range from 1961 (Central Phoenix) to
July 2011 (Deer Valley). Land use patterns around these sites vary from heavy populated urban areas to
sparsely populated rural settings. Site elevations range from 845 feet above sea level (Buckeye) to 5190 feet
above sea level at the top of Humboldt Mountain. Not all pollutants are measured at all sites; some sites
measure most of the pollutants, while others only measure one or two pollutants. No agreements have been
made to share network design responsibilities for any MSAs in our jurisdiction.
The following section will detail how the department designs its air monitoring network to obtain representative
samples of these air pollutants. Following this will be details of the results obtained from our 2012 sampling
season.

2012 Air Monitoring Network Review

12

Maricopa County Air Quality Department

NETWORK DESIGN
Monitoring Objectives
The ambient air monitoring networks must be designed to meet three basic monitoring objectives.
These basic objectives are listed below. The appearance of any one objective in the order of this list is
not based upon a prioritized scheme. Each objective is important and must be considered individually.
•

Provide air pollution data to the general public in a timely manner. Data can be presented to the
public in a number of attractive ways including through air quality maps, newspapers, Internet
sites, and as part of weather forecasts and public advisories.

•

Support compliance with ambient air quality standards and emissions strategy development.
Data from FRM, FEM, and ARM monitors for NAAQS pollutants will be used for comparing
an area's air pollution levels against the NAAQS. Data from monitors of various types can be
used in the development of attainment and maintenance plans. SLAMS and N-Core station data
will be used to evaluate the regional air quality models used in developing emission strategies,
and to track trends in air pollution abatement control measures' impact on improving air
quality.

•

Support for air pollution research studies. Air pollution data from the N-Core network can be
used to supplement data collected by researchers working on health effects assessments and
atmospheric processes, or for monitoring methods development work.

Monitoring Site Types
In order to support the air quality management work indicated in the three basic air monitoring
objectives, a network must be designed with a variety of types of monitoring sites. Monitoring sites
must be capable of informing managers and the general public about many things including the peak
air pollution levels, typical levels in populated areas, air pollution transported into and outside of a city
or region, and air pollution levels near specific sources (Table 2).
Table 2 Site Monitoring Types
Highest concentrations expected to occur in the area covered by the network.
Measure typical concentrations in areas of high population density.
Determine the impact of significant sources or source categories on air quality.
Determine general background concentration levels.
Determine the extent of regional pollutant transport among populated areas and in support of secondary
standards.
Sites located to measure air pollution impacts on visibility, vegetation damage, or other welfare-based
impacts.

Monitoring Spatial Scales
The concept of spatial scale of representativeness was created to help link monitoring objectives and
site types with the physical location of a monitor. Spatial scale of representativeness is defined in
terms of the physical dimensions of the air parcel around a monitoring site throughout which pollutant
2012 Air Monitoring Network Review

13

Maricopa County Air Quality Department

concentrations are reasonably similar. There are six scales of representativeness of most interest for the
monitoring site types (Table 3).
Table 3 Spatial Scales of Representativeness
Name
Micro Scale
Middle Scale
Neighborhood Scale
Urban Scale
Regional scale
National and global Scales

Distance
0 to 100 meters
100 to 500 meters
0.5 to 4 kilometers
4 to 50 kilometers
10 to 100’s of kilometers
Characterizing the nation and the globe as a
whole.

Locating Monitors
Since it is physically and fiscally impossible to monitor air quality in every location, the goal in
locating monitors is to correctly integrate the monitoring objective and monitoring site type with the
spatial scale most appropriate for the air pollutant to be measured. For example, consider the case
where the objective is to determine NAAQS compliance by understanding the maximum ozone
concentrations for an area. Such areas would most likely be located downwind of a metropolitan area,
quite likely in a suburban residential area where children and other susceptible individuals are likely to
be outdoors. Sites located in these areas are most likely to represent an urban scale of measurement. In
this example, physical location was determined by considering ozone precursor emission patterns,
public activity, and meteorological characteristics affecting ozone formation and dispersion. Thus,
spatial scale of representativeness was not used in the selection process but was a result of site
location.
Using these principles, the total number of monitoring sites that will serve the variety of data needs will be
substantially higher than federal minimum requirements. The optimum size of a particular network involves
trade-offs among data needs and available resources. This does not mean that the number of monitoring sites is
fixed. To the contrary, each network must be dynamic enough to maintain a current representative sample of the
air quality. The EPA, State, and local agencies will periodically collaborate on network design issues through
the network assessment process outlined in § 58.10.

2012 Air Monitoring Network Review

14

Maricopa County Air Quality Department

Overview of the Maricopa County Air Quality Department’s Air Monitoring Network
Maricopa County has a population of over 3.9 million people (2012 US Census estimate). The EPA
has mandated a minimum number of monitors required to properly represent this population. MCAQD
has designed its network, using the concepts of scale and objective mentioned previously, to meet and
in most cases exceed these EPA requirements (see “Required General Information on Monitoring
Network” in Appendix II).
Altogether, the department operated a network of 24 monitoring sites in 2012. The following image
details the location of these sites and gives the abbreviation symbols used by Maricopa County. Table
4 and Table 5, which follows, gives the AQS code assigned to each site and details which criteria
pollutant is monitored at which site along with the monitor designation, respectively. Table 6 and
Table 7 give more specific information about the location of the sites and the types and numbers of
monitors at each site, respectively.

Figure 1 Maricopa County Air Monitoring Sites for 2012

2012 Air Monitoring Network Review

15

Maricopa County Air Quality Department

Table 2 Maricopa County Ambient Air Monitoring Sites for 2012
Site Name
Blue Point
Buckeye
Cave Creek
Central Phoenix
Deer Valley
Durango Complex
Dysart
Falcon Field
Fountain Hills
Glendale
Greenwood
Higley
Humboldt Mountain

Site Abbr.
BP
BE
CC
CP
DV
DC
DY
FF
FH
GL
GR
HI
HM

AQS Code
04-013-9702
04-013-4011
04-013-4008
04-013-3002
04-013-4018
04-013-9812
04-013-4010
04-013-1010
04-013-9704
04-013-2001
04-013-3010
04-013-4006
04-013-9508

Site Name
Mesa
North Phoenix
Pinnacle Peak
Rio Verde
South Phoenix
South Scottsdale
Tempe
West Chandler
West 43rd Ave.
West Phoenix
Zuni Hills

Site Abbr.
ME
NP
PP
RV
SP
SS
TE
WC
WF
WP
ZH

AQS Code
04-013-1003
04-013-1004
04-013-2005
04-013-9706
04-013-4003
04-013-3003
04-013-4005
04-013-4004
04-013-4009
04-013-0019
04-013-4016

Table 3 Criteria Pollutants Monitored, by Site and Network
Site
Blue Point
Buckeye
Cave Creek
Central Phoenix
Deer Valley
Durango Complex
Dysart
Falcon Field
Fountain Hills
Glendale
Greenwood
Higley
Humboldt Mountain
Mesa
North Phoenix
Pinnacle Peak
Rio Verde
South Phoenix
South Scottsdale
Tempe
West Chandler
West 43rd Ave.
West Phoenix
Zuni Hills

CO

Pb

SLAMS
SLAMS
SLAMS
SLAMS
SLAMS

SLAMS

O3
SLAMS
SLAMS
SLAMS
SLAMS
SLAMS
SLAMS
SLAMS
SLAMS

SLAMS
SLAMS
SLAMS
SLAMS

SLAMS
SLAMS
SLAMS
SLAMS
SLAMS
SLAMS
SLAMS
SLAMS
SLAMS

SLAMS

SLAMS

SLAMS
SLAMS

PM2.5

PM10

NO2

SLAMS

SLAMS

SLAMS

SLAMS

SLAMS

SLAMS
SLAMS

SLAMS

SLAMS
SLAMS
SLAMS

SLAMS
SLAMS

SLAMS
SLAMS

SLAMS

SLAMS
SLAMS
SLAMS
SLAMS
SLAMS
SLAMS
SPM

SLAMS
SLAMS

SO2

SLAMS
SLAMS

SLAMS

SLAMS

SLAMS=State and Local Monitoring Station; SPM=Special Purpose Monitoring Station

2012 Air Monitoring Network Review

16

Maricopa County Air Quality Department

Table 4 Site Location
Site

Latitude

Longitude

Site Location

BP
BE
CC
CP
DV
DC
DY
FF
FH
GL
GR
HI
HM
ME
NP
PP
RV
SP
SS
TE
WC
WF
WP
ZH

33.54549

-111.60925

33.37005

-112.62070

33.82169

-112.01739

33.45793

-112.04601

33.684627

-112.08635

33.42650

-112.11814

33.63713

-112.34184

33.45223

-111.73331

33.61103

-111.72529

33.56936

-112.19153

33.46093

-112.11748

33.31074

-111.72255

33.98280

-111.79870

33.41045

-111.86507

33.56033

-112.06626

33.71231

-111.85272

33.71881

-111.67183

33.40316

-112.07533

33.47968

-111.91721

33.4124

-111.93473

33.29898

-111.88431

33.40642

-112.14434

33.48385

-112.14257

33.686738

-112.294171

Usery Pass & Bush Highway
MC85 & HWY 85
32nd St. & Carefree Highway
19th St & Roosevelt
10th Ave. & Deer Valley Rd.
27th Ave. & Durango St.
Bell Rd. & Dysart Rd.
McKellips & Greenfield
Palisades & Fountain Hills Blvd.
59th Ave & W. Olive
27th Ave. & Interstate 10
Higley Rd. & Chandler Blvd
Top of Humboldt Mountain
Broadway Rd. & Alma School Rd.
7th Street & Dunlap Avenue
Pima Rd & Pinnacle Peak
Forest Rd & Del Ray Ave.
Central Ave. & Broadway
Scottsdale Rd. & Miller Rd.
College Ave. & Apache Blvd.
Ellis St. & Frye Rd.
43rd Ave. & Broadway Rd.
39th Ave. & Earll Dr.
109th Ave & Deer Valley Rd.

2012 Air Monitoring Network Review

17

AQS Code
04-013-9702
04-013-4001
04-013-4008
04-013-3002
04-013-4018
04-013-9812
04-013-4010
04-013-1010
04-013-9704
04-013-2001
04-013-3010
04-013-4006
04-013-9508
04-013-1003
04-013-1004
04-013-2005
04-013-9706
04-013-4003
04-013-3003
04-013-4005
04-013-4004
04-013-4009
04-013-0019
04-013-4016

Maricopa County Air Quality Department

Table 5 Site Instrument Setup

AIR MONITORING NETWORK OPERATIONS
Sites
BP
BE
CC
CP
DC
DY
DV
FF
FH
GL
GR
HI
HM
ME
MM #
NP
PP
RV
SP
SS
TE
WC
WF
WP
ZH
Active
Instr

WS/
WD

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

23

O3

1
1
1
1
1
1
1
1

1
1
1
1
1
1
1
1
1
1
1

19

* = seasonal monitor

CO

1

NO2

*

1

1
1

1

*

1
1

*

1
1
1

*
1
*

1
1
1
1

SO2

1
1

1

1
1
1
1

1
1
1

1
1
1
1
1

1

13

1

1
1
1

1

4

2

PM10

1

1
1
1
1

*
*
*
*

1

Press

Delta
Temp

17

1

1

1
1
1

5

1
1
1
1
1
1

PM2.5

Pb

1
2

1

1
1
1

1
1
1
1
1
1
1

1

17

8

1

1

2

Temp

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Rel
Hum

1
1
1
1
1
1
1

1
1
1

1
1
1
1
1
1
1

1
1

23

13

1

Room
Tmp

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
25

Rain

Multi
-Gas

1

1

1

1

1
1

1

1

1

2

2

2

2

1

AQS Code

04-013-9702
04-013-4011
04-013-4008
04-013-3002
04-013-9812
04-013-4010
04-013-4017
04-013-1010
04-013-9704
04-013-2001
04-013-3010
04-013-4006
04-013-9508
04-013-1003
Mobile Truck

04-013-1004
04-013-2005
04-013-9706
04-013-4003
04-013-3003
04-013-4005
04-013-4004
04-013-4009
04-013-0019
04-013-4016

18

Maricopa County Air Quality Department

Active
Inst

4
10
6
10
8
8
6
4
6
9
8
6
4
9
13
10
3
2
9
9
9
8
6
12
4

6

Total # of Pollutant Monitors
Total # of Active Instruments
Number of Active Sites

# = Mobile Monitoring Truck

2012 Air Monitoring Network Review

Solar

PM
2.5
Filter

67
183
24

Last
Audit
12/6/12
12/6/12
4/22/10
4/22/10
4/22/10
4/22/10
6/8/10
12/10/12
4/22/10
4/22/10
12/22/12
4/22/10
12/10/12
12/10/12
1/22/13
12/10/12
4/22/10
4/22/10
12/7/12
12/7/12
12/1/12
4/22/10
12/10/12
4/22/10
12/10/12

2012 SUMMARY OF NETWORK RESULTS AND REQUIRED
INFORMATION
Data Completeness
Before any data set can be considered valid it must first pass a data recovery test that consists of
determining the ratio of actual samples to scheduled samples by quarter. This ratio must be greater
than 75% for a data set to pass the first validity test. After all validation tests have been passed, the
data can be used to determine compliance with the NAAQS.
The following is a summary of the annual data completeness for all criteria pollutants (Table 8). Note
that CO, O3, NO2, and SO2 samples are all from continuous monitors and are therefore hourlyaveraged samples. PM monitors are either continuous, and therefore hourly-averaged, or filter-based
and daily-averaged. Filters are sampled for 24 hours every 3rd day (PM2.5) or every 6th day (PM10).
Table 6 2012 Criteria Pollutant Data Completeness

Carbon Monoxide
Lead
Nitrogen Dioxide
Ozone
PM2 5 (1 in 3 day)
PM2 5 (continuous)
PM10 (1 in 6 day)
PM10 (continuous)
Sulfur Dioxide
Total

Number of
Actual Samples
68674

Number of
Scheduled Samples
69456

Data Completeness
(Actual/Schedule)
98.9

71

91

78.0

34313

35136

97.7

110311

112128

98.4

213

221

96.4

48323

52680

97.3

378

389

97.2

124321

125928

98.8

17187

17568

97.8

403791

413597

97.6

2012 Air Monitoring Network Review

18

Maricopa County Air Quality Department

Criteria Pollutant Summary
Carbon Monoxide (CO)

Figure 2 2012 Carbon Monoxide Monitoring Sites

During 2012, twelve CO monitors were reported as operational to the US EPA Air Quality System
(AQS) (Figure 2). All CO monitors are classified as SLAMS (Table 5).
There are two primary standards for CO, the 8-hour average and the 1-hour average. The 8-hour
primary standard is 9 ppm and the 1-hour primary standard is 35 ppm. A violation of the standard is
any two exceedances in a calendar year. For calendar year 2012, no exceedances of the CO 1-hour or
8-hour standards were recorded at any MCAQD monitoring sites (see Table 9).

2012 Air Monitoring Network Review

19

Maricopa County Air Quality Department

Table 7 2012 8-hour Average Carbon Monoxide Summary
CO 8-hour Average Max.
(PPM);
Date: Hour
0.5; 01/01:06

CO 8-hour Average 2nd
High (PPM); Date: Hour
0.5; 01/16:07

Number of
Exceedances of 8-Hour
average
0

C. Phoenix

2.7; 01/01:05

2.0; 01/06:01

0

Dysart

0.6; 11/18:01

0.6; 12/17:10

0

Glendale

1.3; 11/18:01

1.3; 12/23:00

0

Greenwood

3.2; 01/01:05

2.1; 01/13:08

0

Mesa

1.4; 12/06:01

1.3; 01/07:01

0

N. Phoenix

1.5; 12/30:02

1.1; 12/30:07

0

S. Phoenix

2.3; 01/01:07

1.6; 01/07:01

0

South Scottsdale

1.3; 01/06:01

1.3; 11/15:00

0

Tempe

1.6; 12/06:01

1.6; 12/08:02

0

West Chandler

1.4; 12/02:02

1.3; 11/01:01

0

W. Phoenix

3.9; 01/01:05

2.5; 01/06:02

0

Site
Buckeye

Note: this table is read as the bold number representing the data followed by the date and time, e.g. 0.7;
01/10:18 is read as: 0.7 PPM on January 10 in the 6 o’clock PM (18:00) hour.
Additional information required by EPA is shown in Table 10.
Table 8 CO Data Required by EPA
CBSA

38060

Population &
Census Year
3,942,169
(2012)

2012 Air Monitoring Network Review

No. of Required
Near-Road
Monitors

No. of Active NearRoad Monitors

No. of Additional
Monitors Needed

0

0

0

20

Maricopa County Air Quality Department

Lead (Pb)

Figure 3 2012 Lead Monitoring Sites

Following the introduction of unleaded gasoline in the early 1990’s, ambient air concentrations of lead
fell to such a low level that Maricopa County was given permission to discontinue monitoring for this
pollutant. However, the lead NAAQS was drastically lowered by a new regulation in 2008, and this
caused concern to begin monitoring for this pollutant again to ensure that the new standard is being
met.
In July of 2010 a new lead monitoring site was opened near the Deer Valley airport in north Phoenix.
Deer Valley Airport, as one of the busiest general aviation airports in the region, is assumed to be the
largest point source of lead within Maricopa County.
The new lead NAAQS has identical primary and secondary standards, a rolling three-month average.
The rolling three month average is violated by an exceedance of 0.15 µg/m3.
Table 9 2012 Lead Summary

Site

24-hour Max.
(µg/m3); Date: Hour

24-hour 2nd High
(µg/m3); Date: Hour

Max. Quarterly
Average
(µg/m3)

Number
of
Samples

Deer Valley

0.057; 12/05:00

0.053; 01/10:00

.0398; 4th Qtr

49

Note: this table is read as the bold number representing the data followed by the date and time, e.g. 0.024;
06/30:05 is read as: 0.024 PPM on June 30 in the 5 o’clock AM (05:00) hour.
2012 Air Monitoring Network Review

21

Maricopa County Air Quality Department

Additional information required by EPA is shown in Table 12.
Table 10 Lead Data Required by EPA
Source Name

Address

Pb Emissions
(tons/yr)

Deer Valley
Airport

Phoenix, AZ

1.1

2012 Air Monitoring Network Review

Emission
Inventory
Source &
Data Year
General
Aviation
Airport 2008

22

Max 3-month
Design Value
(µg/m3)

Design Value
Date (third
month, year)

No. of
Required
Monitors

No. of Active
Monitors

No. of
Additional
Monitors
Needed

0.0398

Dec 2012

1

1

0

Maricopa County Air Quality Department

Nitrogen Dioxide (NO2)

Figure 4 2012 Nitrogen Dioxide Monitoring Sites

All parts of Maricopa County are in attainment for nitrogen dioxide. During 2012, four NO2 monitors
were operational and were reported in AQS (Figure 4). All NO2 monitors are designated as SLAMS
(see Table 5).
Compliance with the NO2 standard is achieved when the annual arithmetic mean concentration in a
calendar year is less than or equal to 53 ppb. A new hourly standard for NO2 began in 2010; this
regulation states that the 3-year average of the 98th percentile cannot exceed 100 ppb. For calendar
year 2012, no exceedances of the NO2 annual or 1-hour standard were recorded at Maricopa County
monitoring sites.
Table 11 2012 Nitrogen Dioxide Summary

Buckeye

NO2 Avg. 1-hour
Max.
(PPB);
47.0

NO2. 1-hour
98th Percentile
(PPB)
39.0

Central Phoenix
Greenwood
West Phoenix

75.0
87.0
77.0

63.0
65.0
58.0

Site

3-Year Avg. of
98th Percentile
(PPB)
37.3
60.7
66.0
56.0

# of 1-hour
Samples
8643

Annual
Average
(PPB)
9.4

8493
8538
8639

21.2
26.0
19.4

Additional information required by EPA is shown in Table 14.

2012 Air Monitoring Network Review

23

Maricopa County Air Quality Department

Table 12 NO2 Data Required by EPA
CBSA

38060

Population Max
& Census
AADT
Year
Counts
(year)
3,942,169
(2012)

320,137

No.
Required
Near
Road
Monitors

No. of
Active
NearRoad
Monitors

No of
Additional
NearRoad
Monitors
Needed

No. of
Required
AreaWide
Monitors

No. of
Active
AreaWide
Monitors

No of
Additional
AreaWide
Monitors
Needed

2

0

0

0

4

0

Ozone (O3)

Figure 5 2012 Ozone Monitoring Sites

During 2012, seventeen ozone monitors were reported as operational in AQS (Figure 5). All of the
ozone monitors are classified as SLAMS (Table 5). The 1-hour average ozone standard was revoked
by the EPA on June 15, 2005, and has been replaced by the 8-hour average standard for compliance
purposes.
On March 12, 2008, the EPA lowered the eight-hour ozone NAAQS from 0.080 to 0.075 ppm.
Compliance with the standard is determined by averaging the 4th highest eight-hour average over a
three-year period. This three-year average must be less than or equal to 0.075 ppm.
There were 90 exceedances of the eight hour primary standard for ozone in 2012. Table 15 presents
the 2012 data summary for eight-hour ozone at department monitoring sites. Also in 2012, there were
2012 Air Monitoring Network Review

24

Maricopa County Air Quality Department

eight violations of the eight-hour primary standard (the 8-hour average NAAQS for ozone is violated
when the three-year average of the fourth high is greater than 0.075 ppm (see Table 16).
Table 13 2012 8-hour Average Ozone Summary
8-hour max.
(PPM);
Date: Hour

2nd High
(PPM);
Date: Hour

3rd High
(PPM);
Date: Hour

4th High
(PPM);
Date: Hour

Blue Point

.079; 05/29:11

.079; 08/08:12

.078; 05/31:11

.077; 05/10:11

Buckeye

.078; 05/14:11

.070; 05/12:11

.069; 05/20:10

.068; 05/09:11

1

Cave Creek

.081; 08/09:12

.080; 05/14:16

.078; 05/20:11

.078; 05/21:10

10

Central Phoenix

.084; 05/14:12

.082; 08/09:11

.081; 07/12:12

.077; 05/20:11

6

Dysart

.079; 05/14:11

.078; 08/09:11

.074; 08/13:10

.073; 08/10:11

2

Falcon Field

.075; 08/09:12

.071; 08/07:11

.069; 05/20:10

.069; 05/21:09

0

Fountain Hills

.083; 05/14:13

.081; 05/31:12

.079; 05/21:09

.077; 05/20:11

5

Glendale

.088; 05/14:12

.084; 07/12:11

.079; 07/10:10

.078; 08/06:10

4

Humboldt Mt.

.082; 05/14:18

.082; 05/28:16

.080; 08/10:18

.079; 05/20:15

11

North Phoenix

.091; 05/14:12

.089; 08/09:11

.087; 07/12:11

.083; 07/10:10

17

Pinnacle Peak

.082; 07/12:12

.082; 08/09:12

.080; 08/10:11

.079; 08/08:10

6

Rio Verde

.076; 08/08:12

.076; 08/09:13

.075; 05/29:11

.072; 05/10:12

2

South Phoenix

.087; 05/14:12

.081; 07/12:11

.078; 05/20:10

.078; 08/09:10

5

South Scottsdale

.086; 07/12:12

.083; 08/09:11

.081; 05/14:12

.080; 05/20:11

7

Tempe

.078; 07/12:12

.075; 05/20:10

.073; 05/14:10

.073; 08/09:10

1

West Chandler

.082; 07/12:11

.079; 05/14:11

.075; 08/09:09

.074; 05/12:11

2

West Phoenix

.087; 05/14:11

.087; 07/12:11

.084; 08/09:11

.083; 08/06:10

9

Site

Number of
Days > 0.075
11

Note: This table is read as the bold number representing the data followed by the date and time, e.g. 0.073;
4/30:12 is read as: 0.073 PPM on April 30 in the 12 o’clock PM (12:00) hour.

2012 Air Monitoring Network Review

25

Maricopa County Air Quality Department

Table 14 3 Year Average of 8-Hour Ozone

Site

2010 4th High (PPM) 2011 4th High (PPM) 2012 4th High (PPM)
.081
.077
.068

Blue Point
Buckeye

3 Yr. Avg. of 4th
High (PPM)*
0.075

.064

.067

.068

0.066

Cave Creek

.074

.081

.078

0.077

Central Phoenix

.072

.073

.077

0.074

Dysart

.071

.070

.073

0.071

Falcon Field

.070

.069

.069

0.069

Fountain Hills

.074

.077

.077

0.076

Glendale

.074

.076

.078

0.076

Humboldt Mt.

.070

.077

.079

0.075

North Phoenix

.079

.081

.083

0.081

Pinnacle Peak

.077

.077

.079

0.077

Rio Verde

.071

.081

.072

0.074

South Phoenix

.074

.076

.078

0.076

South Scottsdale

.076

.075

.080

0.077

Tempe

.068

.070

.073

0.070

West Chandler

.074

.074

.074

0.074

West Phoenix

.075

.078

.083

0.078

 Indicates violation of the standard.
Additional information required by EPA is shown in Table 17.
Table 15 Ozone Data Required by EPA
CBSA

County

38060

Maricopa

Population
& Census
Year
3,942,169
(2012)

2012 Air Monitoring Network Review

8-Hr
Design
Value
(ppm)

Design
Value Site
North
Phoenix

0.081

26

No.
Required
Monitors

No. Active
Monitors

No. of
Additional
Monitors
Needed

2

17

0

Maricopa County Air Quality Department

Particulate Matter <=10 Microns (PM10)

Figure 6 2012 PM10 Monitoring Sites (includes continuous and non-continuous sites)

During 2012, sixteen PM10 monitors were reported as operational in AQS (Figure 6). All PM10
monitors are classified as SLAMS; except for Zuni Hills which is classified as a Special Purpose (SP)
monitor (Table 5). Note that fourteen of these PM10 sites operate continuous monitors which collect
hourly-averaged data; the other two are non-continuous filter-based monitors which collect 24-hour
averaged data on a 1-in-6 day schedule.
The 24-hour Primary standard for PM10 is 150 µg/m3 (155 µg/m3 with mathematical rounding). This
standard is violated when the expected number of exceedances for the calendar year is more than one.
A formula, as detailed in 40 CFR 50, is used to determine the expected number of exceedances. The
formula takes into account the number of days sampling occurred and the number of valid samples
collected. A 3-year average of these estimated days is then used to determine compliance. On
December 18, 2006 new monitoring rules from the EPA revoked the PM10 annual primary standard,
although the annual average is still displayed below for informational purposes (See Table 18).

2012 Air Monitoring Network Review

27

Maricopa County Air Quality Department

Table 16 2012 PM10 Summary

Site Name
Buckeye

24-hr
24-hr
Number of
Average Average
Annual
24-hour
Max 2nd High NAAQS
Expected Average #Exceptional
(µg/m3) (µg/m3) Exceedances Exceedances (µg/m3)
Events

Number
of
Samples

205*

202*

2

2.022

47.4

4

8692

Central Phoenix

340*

137

1

1

37.9

1

8649

Durango Complex

221*

217*

4

4

49.1

4

8677

Dysart (continuous)
Glendale (continuous)
Greenwood

167*
337*

127
136

1
1

1
1

30.0
34.1

1
1

8694
8715

323*

212*

2

2

45.3

2

8664

Higley (continuous)
Mesa
North Phoenix

224*
64

194*
57

4
0

4
0

38.0
22.8

4
0

8713
55

178*

140

1

1

32.4

1

8624

South Phoenix

342*

285*

3

3.095

47.9

2

8564

South Scottsdale
Tempe (continuous)
West Chandler

102
169*

91
145

0
1

0
1

31.6
34.7

0
2

159
7285

402*

221*

5

5.067

36.1

5

8668

West 43 Ave

254*

220*

6

6.055

50.5

7

8681

West Phoenix

189*

148*

1

1.011

46.9

1

8696

Zuni Hills

285*

147

1

1

49.1

1

8700

(continuous)
(continuous)
(continuous)

(continuous)

(continuous)
(continuous)

(continuous)

rd

(continuous)
(continuous)
(continuous)

*Indicates an exceedance of the standard.

Note that some data have the potential for being classified as exceptional events (see Definition of
Terms for explanation of exceptional events). In accordance with the EPA’s exceptional events policy,
once approved these data are not used in determining compliance with the NAAQS. Values in Table
18 are from official AQS reports as of the date of publishing this review; exceptional events that have
not yet been approved by the EPA will not affect these values until they are approved. The process of
approving exceptional events can take over a year after the exceedance day, so some values in Table
18 could change upon EPA approval of an exceptional event petition.
On July 2, 2002 (67 FR 44369), EPA found the state implementation plan (SIP) for the Metropolitan
Phoenix (Maricopa County), Arizona serious PM10 non-attainment area to be inadequate to attain the
24-hour particulate (PM10) air quality standard at the Salt River monitoring site. Under authority from
the Clean Air Act, EPA has required a SIP revision to be submitted by the State of Arizona to correct
the inadequacy. In 2004 the Arizona Department of Environmental Quality submitted a SIP
addressing the inadequacies in the Salt River Area to the EPA. As of December 31, 2012, Maricopa
County has not come into compliance with the NAAQS for PM10. As a result of this, the EPA is
requiring a 5% plan which began in 2008. This required Maricopa County to submit an approved plan
to reduce the annual PM10 emissions of Maricopa County by 5% until the standard is met. Failure to
2012 Air Monitoring Network Review

28

Maricopa County Air Quality Department

comply with this plan or to meet the NAAQS for PM10 will result in further 5% reductions annually,
and could result in sanctions from the EPA.
Additional information required by EPA is shown in Table 19.
Table 17 PM10 Data Required by EPA
CBSA

County

38060

Maricopa

Population
& Census
Year
3,942,169
(2012)

2012 Air Monitoring Network Review

Max Conc.

Max Conc.
Site
West
Chandler

669

29

No.
Required
Monitors

No. Active
Monitors

No. of
Additional
Monitors
Needed

6-10

16

0

Maricopa County Air Quality Department

Particulate Matter <=2.5 Microns (PM2.5)

Figure 7 2012 PM2.5 Monitoring Sites (continuous and non-continuous)

Currently MCAQD operates collocated filter-based compliance PM2.5 monitors at the West Phoenix
site and single filter-based monitors at the Mesa and South Phoenix site (Figure 7). These compliance
PM2.5 monitors all use sample filters and are non-continuous in nature. On July 1, 2007, the
department took over weighing the sample filters, a process that was previously done by the ADEQ.
All filters are processed and weighed in our internal laboratory. In addition to the filter-based
monitors, the department operates seven continuous PM2.5 monitors at the Durango, Glendale, Mesa,
North Phoenix, South Phoenix, Tempe and West Phoenix sites. These continuous monitors have
recently been reclassified as Federal Equivalency Methods (FEM), so their data are applicable to
comparison with the national standards. All monitors are identified as SLAMS (Table 5).
Note that the PM2 5 network is much smaller than the PM10 network. The reason for this is that historically more
concern and resources have been given to PM10, since Maricopa County is not in attainment for this pollutant
(Maricopa County is currently in attainment for PM2 5). According to federal regulations, Maricopa County does
operate more than the required minimum number of PM2 5 monitors for the MSA (see Table 24 and Appendix
II). The Air Monitoring Division continually assesses if the existing network adequately represents the air
quality (PM2 5) in Maricopa County. One result from these ongoing assessments has been the addition of the
continuous PM2 5 monitors.

On December 18, 2006, the EPA implemented new primary standards for PM2.5. These new rules
changed the 24-hour average standard from 65 µg/m3 to 35 µg/m3. The annual average standard of 15
µg/m3 remains unchanged. Compliance with the 24-hour standard is determined by taking the 3-year
average of the 98th percentile at each monitoring site. Compliance with the Annual standard is
2012 Air Monitoring Network Review

30

Maricopa County Air Quality Department

determined by taking the 3-year average of the spatially averaged annual means.
There were no
violations of the 24-hour standard or the annual standard. Data is summarized in Table 20 and Table
21. Averages used for determining compliance with the NAAQS are shown in Table 22 and Table 23.
Table 18 2012 PM2.5 Summary (FRM Filter-based Monitors)
24-hr Avg. 24-hr Avg.
Max
2nd High
3
(µg/m )
(µg/m3)
23.3
11.5

Site Name
Mesa

98th
Percentile
Value
23.3

Annual Avg. Number of
(µg/m3)
Samples
8.51#
9#

South Phoenix

70.0*

24.4

24.4

11.5#

58#

West Phoenix

112.6*

35.5*

29.0

12.0

120

*Indicates an exceedance of the standard.
#Does not meet data completeness standards for year.

Table 19 2012 PM2.5 Data Summary (FEM Continuous Monitors)
24-hr Avg. 24-hr Avg.
Max
2nd High
(µg/m3)
(µg/m3)

Site Name
North Phoenix

98th
Percentile Annual Avg. Number of
Value
(µg/m3)
Samples

30.1

29.9

21.2

9.26

8616

Glendale

66.1*

42.7*

18.6

8.74

8688

Durango Complex

74.4*

36.7*

24.9

11.6

8688

South Phoenix

70.8*

46.8*

20.9

9.24

8472

West Phoenix

89.1*

37.0*

23.6

10.4#

5808

Tempe

23.1

22.4

19.5

9.27

7128

Mesa

16.0

10.4

10.4

5.84#

1464

(continuous)
(continuous)
(continuous)
(continuous)
(continuous)
(continuous)
(continuous)

*Indicates an exceedance of the standard.
#The continuous FEM PM2.5 monitors represents a part year monitor and do not constitute a 75% data
completeness rate for 2012 annual averages.

Table 20 2012 PM2.5 3-Year Averages of 98th Percentile (FRM Monitors)

Site Name
Mesa
South Phoenix
West Phoenix

2010
98th Percentile
Value
11.8
24.0
21.6

2011
98th Percentile
Value
20.4
31.5
28.9

#Does not meet data completeness standards for year.

2012 Air Monitoring Network Review

31

2012
98th Percentile
Value
23.3#
24.4#
29.0

98th Percentile
3-Year Average
18.5
26.6
26.5

Maricopa County Air Quality Department

Table 21 2012 PM2.5 3-Year Averages of 98th Percentile (FEM Monitors)

Site Name
North Phoenix
Glendale
Durango Complex
South Phoenix
West Phoenix
Tempe
Mesa

2010
98th Percentile
Value
N.A.
N.A.
24.3
24.4
22.0
N.A.
N.A.

2011
98th Percentile
Value
23.0
27.8
31.2
27.2
31.5
N.A.
N.A.

2012
98th Percentile
Value
21.2
18.6
24.9
20.9
23.6
19.5
10.4

98th Percentile
3-Year Average
22.1
23.2
26.8
24.2
25.7
19.5
10.4

Additional information required by EPA is shown in Table 24.
Table 22 PM2.5 SLAMS Data Required by EPA
CBSA

County

38060

Maricopa

Population
& Census
Year
3,942,169
(2012)

Annual
Design
Value
(µg/m3)
10.7

2012 Air Monitoring Network Review

Annual
Design
Value
Site
West
Phoenix

Daily
Design
Value
(µg/m3)
26.6

32

Daily
Design
Value
Site
South
Phoenix

No. of
Required
Monitors

No. of
Active
Monitors

No. of
Additional
Monitors
Needed

3

7

0

Maricopa County Air Quality Department

Sulfur Dioxide (SO2)

Figure 8 2012 Sulfur Dioxide Monitoring Sites

Maricopa County is in attainment for SO2. During 2012, two SO2 monitors were operational and were
reported in AQS (Figure 8). Both of these monitors were designated SLAMS (see Table 5).
Sulfur Dioxide has a 1-hour primary standard and a 3-hour average secondary standard. The 24-hour
and annual average standards were revoked in a June 2010 rulemaking. A violation of the primary
standard occurs when the 3-year average of the 99th percentile of the daily maximum 1-hour average
exceeds 75 ppb. A violation of the 3-hour average secondary standard occurs when a 3-hour average
of 500 ppb is exceeded more than once per year. For calendar year 2012, no exceedances of the SO2
1-hour or 3-hour standard were recorded at Maricopa County monitoring sites (see Table 25 for 1-hour
values – note that EPA no longer reports 3-hour values).
Table 23 2012 Sulfur Dioxide Summary
1-hour Max.
(PPB)

Site

1-hour 2nd High
(PPB)

99th Percentile
(PPB)

Number of
Samples

Central Phoenix

9.0

9.0

8.0

8573

Durango Complex

18.0

11.0

9.0

8614

2012 Air Monitoring Network Review

34

Maricopa County Air Quality Department

Additional information required by EPA is shown in Table 26.
Table 24 SO2 Data Required by EPA
CBSA County

38060

Maricopa

Population &
Census Year
3,942,169
(2012)

2012 Air Monitoring Network Review

Total SO2
(tons/year)

Population Weighted
Emission Index
(million persons-tons
per year)

No. of Required
Monitors

No. of Active
Monitors

No. of Additional
Monitors Needed

977

3851

0

2

0

35

Maricopa County Air Quality Department

2012 NAAQS Exceedance and Violation Summary
The following is a summary of the number, types and dates of exceedances and violations of the
NAAQS for 2012 (Table 27).
Table 25 2012 NAAQS Exceedances and Violation Summary

Carbon
Monoxide

No exceedances or violations of the 1-hr or 8-hr NAAQS standard were logged.

Nitrogen
Dioxide

No exceedances or violations of NAAQS were logged.

Ozone

There were 28 unique days when at least one monitor exceeded the standard.
There were 90 individual exceedances of the 8-hour standard which occurred at
16 different sites. There were eight violation of the 8-hour standard.

PM10

There were 13 unique days when at least one monitor exceeded the standard and
13 sites violated the 24-hour standard.

PM2.5

There were 4 unique days when at least 1 FRM or FEM monitor exceeded the
standard.. There were no violations of the 24-hour or annual standards.

Sulfur Dioxide

No exceedances or violations of NAAQS were logged.

2012 Ozone Exceedance and Violation Details
Table 28 details the dates and values for exceedances of the 8-hour ozone standard. The standard is
0.075 ppm for an eight hour average. Table 29 details violations of the 8-hour ozone standard.
Violations are calculated with a three-year average of the fourth-highest annual 8-hour value, if this
three-year average is greater than 0.075 ppm the site violates the standard.
Table 26 2012 Ozone 8-hour Average Exceedance Details
Site
Buckeye
Blue Point

Date

5/14/12
2/29/12
8/08/12
5.31/12
5/10/12
5/22/12
7/12/12
8/09/12
5/13/12
5/14/12
5/20/12

Cave Creek
2012 Air Monitoring Network Review

8/09/12
36

Value (ppm)
0.078
0.079
0.079
0.078
0.077
0.077
0.077
0.077
0.076
0.076
0.076
0.081

Maricopa County Air Quality Department

5/14/12
5/20/12
5/21/12
5/28/12
5/13/12
5/31/12
6/02/12
7/12/12
8/10/12
5/14/12
8/09/12
7/12/12
5/20/12
8/04/12
7/11/12
5/14/12
8/09/12
5/14/12
5/31/12
5/21/12
5/20/12
5/29/12
5/14/12
7/12/12
7/10/12
8/06/12
5/14/12
5/28/12
8/10/12
5/20/12
4/17/12
5/22/12
6/01/12
6/02/12
8/09/12
5/21/12
5/14/12
8/09/12
7/12/12
7/10/12
5/20/12
8/06/12
8/14/12
8/04/12
8/10/12
5/13/12

Central Phoenix

Dysart
Fountain Hills

Glendale

Humbolt Mountain

North Phoenix

2012 Air Monitoring Network Review

37

0.080
0.078
0.078
0.077
0.076
0.076
0.076
0.076
0.076
0.084
0.082
0.081
0.077
0.077
0.076
0.079
0.078
0.083
0.081
0.079
0.077
0.076
0.088
0.084
0.079
0.078
0.082
0.082
0.080
0.079
0.078
0.078
0.078
0.078
0.077
0.076
0.091
0.089
0.087
0.083
0.082
0.081
0.081
0.080
0.080
0.077

Maricopa County Air Quality Department

Table 28 2012 Ozone 8-hour Average Exceedance Details (Cont’d)
Site
Pinnacle Peak

Date
7/12/12
8/09/12
8/10/12
8/08/12
8/07/12
8/20/12
8/08/12
8/09/12
5/14/12
7/12/12
5/20/12
8/09/12
7/11/12
7/12/12
8/09/12
5/14/12
5/20/12
8/04/12
8/06/12
8/10/12
7/12/12
7/12/12
5/14/12
5/14/12
7/12/12
8/09/12
8/06/12
7/11/12
7/10/12
8/10/12
5/20/12
8/27/12

Rio Verde
South Phoenix

South Scottsdale

Tempe
West Chandler
West Phoenix

2012 Air Monitoring Network Review

38

Value (ppm)
0.082
0.082
0.080
0.079
0.077
0.076
0.076
0.076
0.087
0.081
0.078
0.078
0.076
0.086
0.083
0.081
0.080
0.078
0.078
0.077
0.078
0.082
0.079
0.087
0.087
0.084
0.083
0.080
0.078
0.078
0.076
0.076

Maricopa County Air Quality Department

Table 27 2012 Ozone Violations

Site
Cave Creek
Fountain Hills
Glendale
North Phoenix
Pinnacle Peak
South Phoenix
South Scottsdale
West Phoenix

Value (ppm)
0.077
0.076
0.076
0.081
0.077
0.076
0.077
0.078

2012 Exceedances of the 24-Hour PM10 Standard
Table 30 details the site and date of exceedances of the 24-hour PM10 standard. Note that this table
includes all exceedances, even those that will be or are in the process of being classified as exceptional
events. Exceptional events are not used in calculating compliance with the NAAQS.
Table 28 2012 PM10 24-hour Average Exceedance Details
Site
Buckeye

Date
8/6/12
6/16/12

24-hr avg. PM-10 Concentration in µg/m3
205*
202*

Central Phoenix

6/27/12

340*

Durango

6/27/12
7/11/12
6/16/12
8/14/12

221*
217*
186*
179*

Dysart

6/16/12

167*

Glendale

6/27/12

337*

Greenwood

6/27/12
7/11/12

323*
212*

Higley

6/27/12
6/16/12
1/22/12
8/11/12

224*
194*
162*
159*

North Phoenix

6/27/12

178*

*MCAQD has applied for exceptional events status.
2012 Air Monitoring Network Review

39

Maricopa County Air Quality Department

Table 30 2012 PM10 24-hour Average Exceedance Details (Cont’d)
Site
South Phoenix

Date
6/27/12
7/11/12
6/16/12

24-hr avg. PM-10 Concentration in µg/m3
342*
285*
165*

Tempe
West Chandler

6/16/12
4/3/13
6/27/12
8/11/12
4/4/12
9/6/12

169*
402*
221*
219*
196*
164*

West 43rd

8/14/12
6/27/12
6/16/12
1/21/12
6/18/12
7/11/12

254*
220*
211*
209*
174*
172*

West Phoenix
Zuni Hills

6/16/12
6/27/12

189*
285*

*MCAQD has applied for exceptional events status.

2012 Air Monitoring Network Review

40

Maricopa County Air Quality Department

2012 Violations of the 24-H ou r PM1 o Standard
The 24-hr NAAQS for paiiiculates is violated when the rate of expected occuITence of exceedances
(samples greater than or equal to 155 µg/m 3) is greater than one over three consecutive years (Table
31) (40 CFR Pait 50.6 (a)).
Table 29 Violations of the 24-hour PM 10 Standard
2010

2011

24-hr
Max.
Site
Buckeye

Expected
/m3 Exceedances
113
0

24-hr
Max.

2012

385+

Expected
Exceedances
9

/m 3

24-hr
Max.
/m3

205+

Rate of
Expected
Expected
Exceedances Exceedances
2.022

106

0

308+

8.022

340;

1

111

0

436;

8

221+

4

81

0

273;

5

167;

1

92

0

242;

5.095

337;

1

158

1.045

388;

7

323;

2

Higley

83

0

362;

8

224+

4

Mesa

86

0

127

0

64#

0

No1t h Phoenix

44

0

186+

3.629

178+

1

South Phoenix

120

0

420;

9.023

342;

3.095

37

0

119

0

102

0

N.A.

N.A.

N.A.

169

1

76

0

669;

11

402;

5.067

112

0

369;

7.066

254;

6.055

86

0

279;

7.457

189;

1.011

70

0

411;

4

285;

1

Central Phoenix
Dmango
Com lex
Dysa1t
Glendale
Greenwood

South Scottsdale
Tempe
West Chandler
West 43rd
Avenue
West Phoenix
Zuni Hills

N.A.

• Indicates violation of the standard.
#Indicates <75% data available.
t Indicates Exceptional Events occtlffed at this site. The listed value is the highest official AQS reading at time of
publication.

Excep tion al Events
Table 31 lists the official records in AQS (at time of publication) for exceedances and violations.
Some of these 2010-201 2 exceedance days were petitioned to be classified as exceptional events and a
request made to the EPA to remove them from official consideration as compliance data. EPA
approval of these requests can talce over a year.

2012 Air Monitoring Network Review

41

Maricopa County Air Quality Department

2012 Exceedances of the 24-Hour PM2.5 Standard
The 24-hour NAAQS for PM2.5 is 35 µg/m3; if the 24-hour block average (midnight-to-midnight)
surpasses this value than it is counted as an exceedance. The 24-hour standard is violated when the
three year average of the 98th percentile exceeds 35 µg/m3. There were no violations in 2012.
Table 30 2012 PM2.5 Exceedances
Site
Durango
Glendale
South Phoenix
West Phoenix

Date
01/01
12/05
01/01
06/27
01/01
12/24
01/01
06/27

2012 Air Monitoring Network Review

Value (ppm)
74.4
36.7
66.1
42.7
70.8
46.8
89.1
37.0

42

Method
Continuous FEM
Continuous FEM
Continuous FEM
Continuous FEM
Continuous FEM
Continuous FEM
Continuous FEM
Continuous FEM

Maricopa County Air Quality Department

Pollution Trends
The following cha11s depict the most recent three-year trends (2009-2011) for each criteria pollutant.
See Table 4 for explanations of site abbreviations.

Carbon Monoxide
10 -.------------------~
9 +-:~~-*"""--;----~It-"""*-----,.---~~~

8 -+--- - - - - - - - - - - - - - - - -----!
7 -+--- - - - - - - - - - - - - - - - -----!
6 -+--- - - - - - - - - - - - - - - - -----!
5 -+--- - - - - - - - - - - - - - - - -----!
4 -+--- - - - - - - - - - - - - - - - - - !
3
2

+-- - I 1 - - -- - -r1t---=-----r - - - - ; 1 - - ---+--

-

BECP

i=J 2011
i=J 2012
--*"""" Standard < 9.0

DY GL GR ME NP SP SS TE WC WP

Chart 12010-20128-hr Avg. Carbon Monoxide Maximum Values

Nitrogen Dioxide
60 0

50 0

40 0

al

c..
c..

30 0

=

201 0

-

2011

c:::::::::J 2012
- - Standard 53 ppb

20 0

10 0

0.0

BE

CP

GR

WP

Chart 2 2010-2012 Nitr ogen Dioxide Annual Average Readings

2012 Air Monitoring Networ k Review

43

Maricopa County Air Quality Dep artment

Ozone
0.09
0.08

PPM

0.07
0.06

2010

0.05

2011

0.04

2012

0.03

Standard
<0.075

0.02
0.01
0

BP

BE

CC

CP

DY

FF

FH

GL

HM

NP

PP

RV SP

SS

TE WC

WP

Chart 3 2010-2012 Ozone 4th High 8-hr Average

Particulates
800
700
600
2010
ug/m3

500
2011
400
2012
300
Standard
<155

200
100
0

BE

CP

DC

DY

GL

GR

HI

ME

NP

SP

SS

TE

WC

WF

WP

ZH

Chart 4 2010-2012 PM10 24-hr Average Maximum Values

2012 Air Monitoring Network Review

44

Maricopa County Air Quality Department

60.0
50.0

ug/m3

40.0
2010
2011

30.0

2012

20.0
10.0
0.0

BE

CP

DC

DY

GL

GR

HI

ME

NP

SP

SS

TE

WC

WF

WP

ZH

Chart 5 2010-2012 PM10 Annual Average
16
14
12
2010

ug/m3

10

2011

8

2012

6

Standard <15

4
2
0

DC

GL

ME

NP

SP

TE

WP

Chart 6 2010-2012 PM2.5 Annual Average

2012 Air Monitoring Network Review

45

Maricopa County Air Quality Department

40
35

-

30

-

,__

25

-

M

E

c;,

20

-

-

-

-

2010

c::::::J 2011
c::::::J 20 12

:s

15

~ Standard

<35 ppm

10
5
0

DC

Gl

ME

NP

SP

--

TE

WP

Chart 7 2010-2012 PM2 .5 98th Percentile
Sulfur Dioxide

35

30

---

'

c:::::::::J 2010

25
20
c:::::::::J 2012

al

3:

15
10

-

Previous
Standard 30

PPB

5
0

1.7

1.2

1.2

1.5

1.1

I

I

DC

CP

Chart 8 2010-2012 Sulfur Dioxide Annual Average

2012 Air Monitoring Network R eview

46

Maricopa C ounty Air Quality Dep ar tment

SPECIAL PROJECTS AND NETWORK CHANGES
Air quality issues such as the SIP, natural events policy, and permits for new sources are diverse and
controversial subjects for the citizens of Maricopa County. Since no policies can be made without
high-quality monitoring data, MCAQD’s Air Monitoring Division strives to provide the most reliable
and relevant air monitoring data to the public. The following is a list of projects and changes that have
occurred during the year 2012.
Seasonal Monitors
The department continues to run some of its carbon monoxide (CO) monitors on a seasonal basis (see
Table 33). Having part of the network operating seasonally allows the county to upgrade instruments,
perform preventive maintenance, extend the life expectancy of the instruments, reduce replacement
costs, and better utilize its QA and QC resources on the remaining instruments. During the off-season
the number of CO monitors operating still exceeds the minimum EPA requirements.
Table 31 Seasonal Monitors

Seasonal Carbon Monoxide Monitors
(Operational Sept. 1 – Apr. 1)
Buckeye
Dysart
Glendale
Mesa
North Phoenix
South Phoenix
South Scottsdale
Tempe
West Chandler

The Consideration of Additional Sites/Monitors
The department continues to evaluate the PM10 network for possible additional sites for determining
the impact on ambient pollution levels of significant sources or source categories. The significant
sources would include industry and agriculture. The allocation of both financial and personnel
resources continue to remain significant obstacles to the establishment of new monitoring sites.
Lead Monitoring
In conjunction with the recent strengthening of the lead NAAQS, EPA is improving the existing
national lead monitoring network by requiring monitors to be placed in areas with sources such as
industrial facilities that emit one ton or more per year (tpy) of lead and in urban areas with more than
500,000 people. In 1997, the EPA allowed MCAQD to stop monitoring for airborne lead because the
data showed values were far below the standard. With the new more stringent standard, the
department once again began monitoring for airborne lead. MCAQD located a new lead monitoring
site at the Deer Valley airport in North Phoenix, which was chosen because federal emissions
inventories have indicated that the Deer Valley Airport emits more than one tpy of lead. This is due to
the lead contained in the general aviation fuel (Deer Valley is a general aviation airport). The site
2012 Air Monitoring Network Review

47

Maricopa County Air Quality Department

began operation in July 2010 and has two co-located filter-based lead monitors which operate on a 1in-6 day schedule.
Other Network Changes/Special Projects/Comments
Air Quality Forecasting
ADEQ, in conjunction with the MCAQD, has developed a year-round air quality forecasting capability
for the Phoenix metropolitan area. ADEQ takes the lead on air quality forecasting and issuing of High
Pollution Advisories, while the MCAQD provides monitoring data and designates No-Burn Days.
Air Monitoring Website
The department is continuing its distribution of air monitoring data to the public by posting one-hour
and 5-minute continuous data on the Internet (see “Maricopa County Interactive Pollution Map”
section below).
Maricopa County Air Quality Dept: http://alert.fcd.maricopa.gov/alert/Google/v3/air.html
Mobile Monitoring Program
The department received approval in late 2006 from the Maricopa County Board of Supervisors to start
a Mobile Monitoring program. This program enables the department to do more source-specific air
monitoring (as opposed to the ambient monitoring that we have historically performed); the ability to
track down sources of air pollutants; the ability to collect and analyze hazardous air-pollutant (HAP)
samples; and the ability to respond to emergencies.
The program is useful for collecting and
analyzing scientific data for various projects, including assisting our compliance division in the
enforcement of air pollution control regulations.
The equipment for this program includes a vehicle outfitted with air monitoring and analytical
equipment. Monitoring and sampling equipment consists of various meteorological, criteria pollutant,
and HAP monitors. Analytical equipment includes a portable Gas-Chromatograph/Mass Spectrometer
(GCMS) and geographical positioning systems. Air monitoring equipment has also been placed in a
mobile trailer that can be quickly moved to areas to operate independently. We also have the ability to
use geographical information systems to build geo-referenced models of sampled pollutants.
In 2012, MCAQD’s Air Monitoring Division is equipped to respond to air quality emergencies
throughout Maricopa County such as heavy smoke from fires or toxic releases that threaten air quality.
All MCAQD Monitoring personnel are required to meet OSHA medical monitoring and U.S. EPA’s 40
CFR 1910.120 training. Members remain current through regular recertification.
Near-Road NO2 Monitoring
In February of 2010, EPA promulgated new minimum monitoring requirements for the nitrogen
dioxide (NO2) monitoring network in support of a newly revised 1-hour NO2 NAAQS. In the new
monitoring requirements, state and local air monitoring agencies are required to install near-road NO2
monitoring stations in larger urban areas where hourly NO2 concentrations in the near-road
environment are believed to be the highest in that urban area.

2012 Air Monitoring Network Review

48

Maricopa County Air Quality Department

The regulations require Core Based Statistical Areas (CBSAs) with 2,500,000 or more persons, or
those CBSAs with one or more roadway segments carrying traffic volumes of 250,000 or more
vehicles (as measured by annual average daily traffic [AADT] counts), shall have two near-road NO2
monitors within that CBSA. Based on the regulation, Maricopa County is required to have two nearroad NO2 monitors. MCAQD has applied for and received EPA grant money to install the first of two
near-road monitors.
Important parameters for traffic activity that can be readily obtained for near-road monitoring
assessments include the number of vehicles, the fleet mix, vehicle speeds (traffic congestion), local
terrain and topography, and meteorology. Each of these parameters has an effect on the concentration
and characteristics of the near-road pollutants. State and local ambient air monitoring agencies are
required (per 40 CFR Part 58 Appendix D, Section 4.3.2.a) to use the latest available census figures
(e.g., census counts and/or estimates) and available traffic data in assessing what monitoring may be
required.
We have completed the process of determining specific locations following procedures found in the
EPA Technical Assistance Document. The two selected sites have been submitted to EPA for
approval.
Site #1
Following an analytical review, our first choice for a new site was chosen in Tempe. Not only was this
site first in fleet equivalency rank, but it passed all of our tests. Specifically, the reasons for choosing
this location are:
•

#1 in fleet-equivalency rank (a comparative rating including both light and heavy-duty
vehicles), #1 in average weekday traffic rank (AWT), and #3 in heavy duty vehicle traffic.
Traffic congestion is extreme.

•

This candidate had desirable supporting features such as freeway orientation and
surrounding grade. Though most of the adjacent area is commercial property, there are
considerable residential parcels nearby.

•

There are locations alongside this road segment with access, safety, security, and power
available. The Arizona Department of Transportation (ADOT), which owns these frontage
spaces, is willing to work with us in establishing a monitoring site.

•

Though major road construction is planned on this freeway in 2019 (freeway widening),
we’ve discussed the issue with ADOT and believe that we’ll be able to move the
monitoring site back far enough to accommodate it (during and after construction). In the
event that such a move is not possible, we would have to prepare another assessment to
relocate the monitoring site; there are other possibilities on the I-10 freeway, though the
entire freeway is undergoing major road construction from the US60/I-10 split to the I-17/I10 split beginning in 2019.

The specific location that we are considering is located on the west side of the I-10 freeway just south
of the Fairmont/Diablo way intersection (Figure 9). The coordinates are 33.396250, -111.967967.
There is a concrete barrier between the freeway and the frontage, offering safety. We will erect a
secure shelter for housing the monitoring instruments, and power can be brought in.
2012 Air Monitoring Network Review

49

Maricopa County Air Quality Department

Figure 9. Aerial photograph and street view of proposed monitoring Site #1.

Site #2
For the second near-road site, it was decided to find a location farther away from the Site #1 so as to represent a
different area. We also wanted to locate the monitor near a high-density population source.
The next most desirable location is located in western Phoenix. This location was chosen for Site #2 for the
following reasons:

•

#13 in fleet-equivalency rank, #17 in AWT traffic, and #12 in heavy-duty vehicle traffic.

•

Extreme traffic congestion..

•

Many residential parcels nearby.

•

Features around the site, such as access and background NO2 sources, are favorable.

•

The frontage space is owned by ADOT, who will work with us to establish a site.

The site does have drawbacks: it located in an east-west orientation, which is parallel to the average
wind direction; the freeway is also approximately 20’ below grade; there is an overpass at 35th
Avenue; and there are sound walls located along the freeway. However, we propose that the positive
aspects outweigh the negative, and features alongside this road segment will allow us access while
avoiding the sound walls.
The location that we are considering is at 34th Avenue on the south side of the I-10 freeway, in a
sound wall gap following the 35th Avenue on-ramp. The coordinates are 33.462103, -112.130393. It
is proposed to place a secure monitoring shelter at the top of the grade; safety features consist of the
setback from the on-ramp and the grade of the slope (note that concrete barricades could be put in
place around the shelter). Availability of power has not yet been verified at this location, though it
appears feasible.

2012 Air Monitoring Network Review

50

Maricopa County Air Quality Department

If power is unavailable at this location, alternative sites are being considered on the south side of I-10
near 33rd Avenue or on the south side of I-10 near 28th Avenue.

Figure 10. Aerial photograph and street view of proposed monitoring Site #2.

Rapid Response Notification System
Maricopa County enjoys many days with clean air. However, there are several days during the year
when air pollution levels approach or exceed federal health standards. It is those days when action
needs to be taken to avoid adding pollution to the air.
In spite of the robust ambient air monitoring network maintained by MCAQD, a lot of pollution can
build up in 60 minutes of time. If a pollution causing event were to go unaddressed, the air quality
levels could greatly exceed a federal health standard causing immediate health impacts to county
residents and threaten our attainment status with the U.S. EPA.
The Rapid Response Notification System was developed to provide a three part value: real-time air
monitoring data, a notification system to alert residents and stakeholders of a pollution problem, and
onsite response from department inspectors and stakeholders to identify and discourage pollution
activity to reduce the risk of pollution impacts. The Rapid Response Notification System serves as a
tool for residents, intergovernmental stakeholders and staff of MCAQD.
When a Rapid Response notification is broadcast, the department will require dust control permit
holders to inspect their site as soon as possible and employ Best Available Control Measures to
stabilize all disturbed soils to reduce blowing dust. Permittees with multiple sites should contact each
site supervisor to ensure compliance with ambient air quality standards.
Emergency Response Notification System
MCAQD assists in monitoring the public exposure to air pollutants including information about the
characteristics, ambient concentration and meteorological data to support decisions on pollutant
dispersion, direction and protection of populated areas.

2012 Air Monitoring Network Review

51

Maricopa County Air Quality Department

MCAQD’s Air Monitoring Division is equipped to respond to air quality emergencies throughout
Maricopa County such as heavy smoke from fires or toxic releases that threaten air quality. All
MCAQD Monitoring personnel are trained for hazardous materials and emergency response based on
U.S. EPA and OSHA approved health and safety guidelines. Team members are required to meet
OSHA medical monitoring and U.S. EPA’s 40 CFR 1910.120 training. Members remain current
through regular recertification.
In responding to emergencies, MCAQD has a wide variety of specialized equipment to assess air
quality and meteorological conditions. These include a large self powered van equipped with a gas
chromatograph/mass spectrometer (GS/MS), carbon monoxide, ozone, sulfur dioxide, nitrogen
dioxide, hydrosulfide and particulate monitors. There is an onboard meteorological station with video
cameras and a centralized data acquisition system (DAS) to collect, store, and distribute the data. It
also has the ability to collect air samples (canisters) to bring back to the GC/MS for analysis.

2012 Air Monitoring Network Review

52

Maricopa County Air Quality Department

ADDITIONAL COMMENTS
Arizona Department of Environmental Quality Network
The ADEQ operates its own monitoring network within the State of Arizona, including some sites
within Maricopa County. In addition to these state-run sites, ADEQ also utilizes several MCAQD
sites to operate their own monitoring equipment. The ADEQ does a variety of ambient pollution, air
toxics, visibility, and meteorological monitoring. One of the main sites in Maricopa County that is
operated by ADEQ is the JLG Supersite in central Phoenix. The Supersite is a National Core multipollutant monitoring station (NCore) and is part of the national monitoring network (MCAQD’s
monitors, on the other hand, are part of the State and Local Air Monitoring network (SLAMS)).
For more information about the state’s network or the NCore JLG Supersite consult the ADEQ’s
Annual Network Plan on their website at: http://www.azdeq.gov/function/forms/reports.html.
EPA Ozone Mapping
The AIRNow website (http://wwww.airnow.gov/) provides real-time air pollution (ozone and PM2.5)
maps for major metropolitan areas around the United States, including the Phoenix Metropolitan Area.
MCAQD has participated in the program since 2001.
MCAQD, in cooperation with ADEQ and
the Pinal County Air Pollution Control
District, has expanded the area that the
maps cover. This area now includes sites
as far east as Queen Creek, as far south as
Casa Grande, and as far west as Palo Verde.
This website can be used as a tool for
which the public can plan their daily
activities and limit their exposure to air
pollution. Eight-hour average peak ozone
concentration maps and real-time eighthour ozone animation maps are provided.
Colors on the map indicate different
concentrations of ozone pollution. The
one-hour average values are given in parts
per billion. The eight-hour averages are
converted into Air Quality Index (AQI)
numbers.
The AQI is based on the
NAAQS. The index was developed to
convert pollution measurements into a
common index that the general public can
more easily understand.

2012 Air Monitoring Network Review

Figure 10 EPA AIRNow Website

53

Maricopa County Air Quality Department

Different colors on the map correspond to different categories of air quality and health impacts ((Table
34)
Table 32 Air Quality Index

0 – 50
51 – 100

Color
Air Quality
Designation
Green
Good
Yellow
Moderate

101 – 150

Orange

151 – 200

Red

Unhealthy for
Sensitive Groups
Unhealthy

201 – 300
301 – 500

Purple
Maroon

Very Unhealthy
Hazardous

Index

Health Impact
No harmful effects expected.
Unusually sensitive people should consider limiting
prolonged outdoor exertion.
Active children & adults, people with respiratory disease
(i.e., asthma) should limit prolonged outdoor exertion.
Everyone should observe caution. Avoid prolonged outdoor
exertion.
Avoid all outdoor exertion. Use extreme caution outdoors
Everyone should avoid all outdoor exertion.

The animated map is updated every hour from 8am to 8pm seven days a week. Updates to the site will
be made during the ozone season (April through October).

2012 Air Monitoring Network Review

54

Maricopa County Air Quality Department

REFERENCES
1. Code of Federal Regulations, Chapter 40, Part 50 and 58, 1997
2. EPA’s AirData (AQS) information: http://www.epa.gov/air/data/index.html
3. EPA’s NAAQS Info: http://www.epa.gov/air/criteria.html
4. SIP Information: http://www.azdeq.gov/environ/air/plan/index.html
5. EPA’s Air Program Information: http://www.epa.gov/rgytgrnj/programs/artd/air/quality/quality.htm
6. Maricopa County Air Quality Department Air Monitoring Map:
http://aqwww.maricopa.gov/AirMonitoring/SitePollutionMap.aspx

7. AIRNow: http://airnow.gov/
8. Criteria Pollutant Information: http://www.epa.gov/air/urbanair/6poll.html
9. Maricopa County Air Quality Department Prior Network Reviews:
http://www.maricopa.gov/aq/divisions/monitoring/network.aspx.

2012 Air Monitoring Network Review

55

Maricopa County Air Quality Department

APPENDIX I - MONITORING SITE DETAILS (PHOTOS AND SPECIFIC INFORMATION)

Blue Point (BP) (04-013-9702)
Location: Bush Highway and
Usery Pass Rd., Maricopa
County
Spatial Scale: Urban
Monitoring Objective: Maximum
Ozone Concentration

Site Description: The Blue Point site became operational in July 1995 and is located in a Maricopa
County Sheriff’s Sub-Station in Tonto National Forest. This site represents the maximum ozone
concentration, and urban-scale downwind transport conditions. This site is located approximately 40
miles east of the Phoenix metropolitan area. Ozone is the only criteria pollutant monitored at this
SLAMS station. Wind speed and direction are also monitored at the site.
Ozone

2010
0.076*
1
0.070

Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
O3 Three year average of 4th High

*Indicates an exceedance of the standard.

2012 Air Monitoring Network Review

56

2011
0.092*
9
0.073

2012
0.079*
10
0.075

Maricopa County Air Quality Department

Buckeye (BE) (04-013-4011)
Location: US 85 & MC 85,
Buckeye
Spatial Scale: Neighborhood and
Urban (NO2)
Monitoring Type: Population
Exposure and Source Oriented
(NO2)

Site Description: The Buckeye site was established on August 1, 2004. This site is a SLAMS location
for carbon monoxide, ozone, PM10, and NO2 criteria pollutants. The site is located in the Maricopa
County Department of Transportation Southwest Facility. The immediate area is agriculture and
encroaching residential development. The NO2 monitors at this site are classified with the Source
Oriented objective; the sources are complexes of power plants that are located approximately 15 miles
to the west. The PM10 monitor at this site was changed from a 1-in-6 day to hourly schedule as of
October 1, 2004.
Carbon Monoxide
Ozone
PM10
Nitrogen Dioxide

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
O3 Three year avg. of 4th High
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Annual NO2 Avg. (PPB)
NO2 1-hour Average 98th Percentile

2010
0.6
0
0.066
0
0.065
113
0
34.1
7.65
35.0

*Indicates an exceedance of the standard.
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

57

2011
0.9
0
0.072
0
0.064
385*
9
43.7
8.8
36.0

2012
0.5
0
0.078
1
0.066
205*‡
2
47.4
9.4
39.0

Maricopa County Air Quality Department

Cave Creek (CC) (04-013-4008)
Location: 32nd St. & Carefree
Highway, Cave Creek
Spatial Scale: Urban
Monitoring Type: Maximum
Ozone Concentration

Site Description: The Cave Creek site became operational in August 2001 and is located in the
Maricopa County Cave Creek Recreation Area (Park Office). This site was chosen through
discussions on modifying the ozone network for the 2005 8-hr ozone standard. Ozone is the only
criteria pollutant monitored at this SLAMS station. Wind speed and direction are also monitored at the
site.
Ozone

Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
O3 Three year average of 4th High

*Indicates an exceedance of the standard.
#Indicates a violation of the standard.

2012 Air Monitoring Network Review

58

2010
0.078*
1
0.074

2011
0.088*
6
0.075

2012
0.081*
10
0.077#

Maricopa County Air Quality Department

Central Phoenix (CP) (04-013-3002)
Location: 19th St. and Roosevelt
Spatial Scale: Neighborhood
Monitoring Type: High Population
Exposure and Highest
Concentration (NO2 and SO2)

Site Description: The Central Phoenix site has been in existence for over four decades and has
provided a long-term historical database with a high rate of data recovery. The site is representative of
high population exposure (greater than 5000 people per square mile) in the central Phoenix area. This
site is a SLAMS location for carbon monoxide, ozone, PM10, SO2 and NO2 criteria pollutants.
Carbon
Monoxide
Ozone
PM10
Nitrogen Dioxide
Sulfur Dioxide

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
O3 Three year avg. of 4th High
Max. 24-hr PM10 Avg. Continuous (µg/m3)
Number exceedances Continuous 24-hr PM10
Annual PM10 Avg. Continuous (µg/m3)
Annual NO2 Avg. (PPB)
NO2 1-hour Average 98th Percentile (PPB)
Max. 24-hr SO2 Avg. (PPB)
Number of Exceedances SO2
Annual SO2 Avg. (PPB)

2010
2.4
0
0.078*
2
0.071
106
0
27.4
18.82
59.0
5
0
1.7

2011
2.1
0
0.081*
2
0.071
308*
8
39.5
19.8
60.0
4.1
0
1.2

*Indicates an exceedance of the standard.
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

59

2012
2.7
0
0.084*
6
0.074
340*‡
1
37.9
21.2
63.0
3.4
0
1.2

Maricopa County Air Quality Department

Deer Valley (DV) (04-013-4018)
Location: 7th Avenue & Deer
Valley Rd.
Spatial Scale: Middle
Monitoring Type: Source Oriented

Site Description: The Deer Valley site is located on the grounds of the Deer Valley Airport in north
Phoenix. This site was started in July 2010 because changes in the lead NAAQS necessitates that
MCAQD begin lead monitoring again (lead monitoring was discontinued in 1997 because ambient
concentrations were consistently much lower than the standard at that time). Deer Valley Airport is
one of the busiest general aviation airports in Maricopa County; since general aviation fuel still
contains lead additives, this is thought to be the largest single source of lead in the county.
Lead

3

Max. 24-hr Pb Avg. (µg/m )
Pb #Daily Exceedances >0.15 µg/m3
Pb Maximum Quarterly Average

*Incomplete data, only two quarters of data are available for calendar year 2010.

2012 Air Monitoring Network Review

60

2010
0.066
0
0.0274*

2011
0.07
0
0.0329

2012
0.057
0
0.0398

Maricopa County Air Quality Department

Durango Complex (DC) (04-013-9812)
Location: 27th Ave and Durango St.
Spatial Scale: Middle
Monitoring Type: Highest
Concentration

Site Description: This site is located in the Maricopa County Flood Control District storage yard one
mile northwest from the former Salt River site, which was closed in 2002. Sampling began on January
6, 1999 with the intent to replace the Salt River site. However, in 2000 the EPA determined that the
site is not equivalent to the Salt River site, which prompted the opening of the West 43rd Avenue site.
Continuous particulate monitors (SLAMS PM10 and PM2.5) are located at this site, and a SO2
monitor was started here in 2011. Note that the PM2.5 monitor is a continuous FDMS-TEOM
monitor, which was not a FEM monitor before 2010, so data from before then was not used for
NAAQS compliance purposes. There are also meteorological monitors (wind speed/direction and
atmospheric pressure) located at the site.
Sulfur
Dioxide
PM10
PM2 5

Max. 24-hr SO2 Avg. (PPB)
Number of Exceedances SO2
Annual SO2 Avg. (PPB)
Max. 24-hr PM10 Avg. Continuous (µg/m3)
Number exceedances Continuous 24-hr PM10
Annual PM10 Avg. Continuous (µg/m3)
Max. 24-hr PM2 5 Avg. (µg/m3)
No. of daily exceedances
Annual PM2 5 Avg. (µg/m3)
98th Percentile Value (µg/m3)

2010
N/A
N/A
N/A
111
0
36.2
64.1*
1
10.16#
24.3

*Indicates an exceedance of the standard.
‡Indicates exceptional events at this site. Listed value is the highest official current AQS reading.
#Indicates <75% data completeness.

2012 Air Monitoring Network Review

61

2011
4.1
0
1.1
436*
8
48.0
52.6*
4
12.4
31.2

2012
4.5
0
1.5
221*‡
4
49.1
74.4*
2
11.6
24.9

Maricopa County Air Quality Department

Dysart (DY) (04-013-4010)
Location: Bell Rd. & Dysart Rd.,
Surprise
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: The Dysart site was established in July 2003. It is located at the Maricopa County
Facility Maintenance Yard at the corner of Bell Rd. and Dysart Rd. The site is in a growing population
area in the northwest valley. The land use around the site consists of subdivisions of single family
homes, commercial, and industrial. The site is approx. one mile west of the Agua Fria riverbed.
Seasonal carbon monoxide, ozone, and PM10 (all SLAMS) are the criteria pollutants monitored at this
station. In September 2009 the PM10 monitor was upgraded from a 1-in-6 day scheduled monitor to a
continuous-monitoring TEOM. This upgrade took place in accordance with regulations due to a PM10
exceedance which occurred at the site.
Carbon Monoxide
Ozone
PM10

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year avg. of 4th High
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

2010
0.9
0
0.082*
1
0.069
81
0
21.5

*Indicates an exceedance of the standard.
‡Indicates exceptional events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

62

2011
0.5
0
0.075
0
0.070
273*
5
29.2

2012
0.6
0
0.079*
2
0.071
167*
1
30.0

Maricopa County Air Quality Department

Falcon Field (FF) (04-013-1010)
Location: Greenfield and
McKellips
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: Ozone is the only SLAMS criteria pollutant monitored at this station. Monitoring
began in June of 1989. The site is located near an airfield in a fire station within a growing residential
area.
Ozone

Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year avg. of 4th High

*Indicates an exceedance of the standard.

2012 Air Monitoring Network Review

63

2010
0.074
0
0.070

2011
0.074
0
0.068

2012
0.075
0
0.069

Maricopa County Air Quality Department

Fountain Hills (FH) (04-013-9704)
Location: Fountain Hills Blvd. and
Palisades Blvd.
Spatial Scale: Neighborhood
Monitoring Type: Maximum Ozone
Concentrations

Site Description: The site, located at a Fountain Hills fire station, became operational in April of 1996
and monitors ozone (SLAMS) and wind speed and direction. The site is located approximately 15
miles downwind from the Phoenix metropolitan area and represents the high downwind concentrations
on the fringes of the central basin district along the predominant summer/fall daytime wind direction.
Ozone

2010
0.081*
3
0.074

Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year avg. of 4th High

*Indicates an exceedance of the standard.
#Indicates a violation of the standard.

2012 Air Monitoring Network Review

64

2011
0.089*
9
0.073

2012
0.083
5
0.076#

Maricopa County Air Quality Department

Glendale (GL) (04-013-2001)
Location: 59th Ave. and Olive Ave.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: The Glendale site was established over three decades ago and is located on the
grounds of Glendale Community College in a populous residential area. Homes, various strip malls,
food establishments, and parks surround the site. Seasonal carbon monoxide, Ozone, PM2.5 and PM10
(all SLAMS) are the criteria pollutants monitored at this station. In September 2009 the PM10 monitor
was upgraded from a 1-in-6 day filter-based monitor to a continuous-monitoring TEOM. This upgrade
took place in accordance with regulations due to a PM10 exceedance which occurred at the site. The
continuous PM2.5 monitor was added in 2011.
Carbon
Monoxide
Ozone
PM10
PM2 5

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year avg. of 4th High
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Max. 24-hr PM2 5 Avg. (µg/m3)
No. of daily exceedances
Annual PM2 5 Avg. (µg/m3)
98th Percentile Value (µg/m3)

2010
3.0
0
0.083*
3
0.072
92
0
22.9
N/A
N/A
N/A
N/A

*Indicates an exceedance of the standard.
+ Represents less than a calendar year of observations (4926 observations)
‡Indicates exceptional events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

65

2011
1.3
0
0.083*
4
0.073
242*
5
32.3
42.7*+
2+
9.1+
27.8+

2012
1.3
0
0.088
4
0.076#
337*‡
1
34.1
66.1*
2
8.7
18.6

Maricopa County Air Quality Department

Greenwood (GR) (04-013-3010)
Location: 27th Ave. and I-10,
Phoenix
Spatial Scale: Middle
Monitoring Type: Population
Exposure

Site Description: Monitoring began at this site in December 1993. The station is bordered on the
north by Interstate 10, on the west and south by neighborhood homes, and to the east by Greenwood
Cemetery. Interstate 17 is approximately one mile to the east of the site. Carbon monoxide, NO2, and
PM10 are the criteria pollutants monitored at this SLAMS facility. This site was converted to
continuous PM10 monitoring in the beginning of 2006.
Carbon Monoxide
PM10
Nitrogen Dioxide

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Annual NO2 Avg. (PPB)
NO2 1-hour Average 98th Percentile (PPB)

2010
3.0
0
158*
1
34.9
24.52
68.0

*Indicates an exceedance of the standard.
‡Indicates exceptional events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

66

2011
2.5
0
388*
7
42.2
25.4
65.0

2012
3.2
0
323*‡
2
45.3
26.0
65.0

Maricopa County Air Quality Department

Higley (HI) (04-013-4006)
Location: Higley Rd. and Williams
Field Rd., Gilbert
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: Originally, in 1994, ADEQ set up this site to monitor for background particulate concentrations near the urban limits of Maricopa County. Since then, urban expansion has enveloped the site, so it no
longer serves its original intended purpose. The Department installed a (1-in-6 day) PM10 (SLAMS) in the
second quarter of 2000. The data from this site was compared to the Chandler site and was found to be
comparable. Since the City of Chandler requested that the department remove the Chandler site on 12/31/05,
this site has taken over the role of that site. As of October 2004 the 1-in-6 day PM10 monitor was replaced with
an hourly continuous PM10 monitor in accordance with 40 CFR 50, Appendix K. This continuous monitor
samples on the neighborhood scale with a monitoring objective of high population exposure.

PM10

Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

2010
83
0
30.1

2011
362*
8
39.0

*Indicates an exceedance of the standard.
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

67

2012
224*‡
4
38.3

Maricopa County Air Quality Department

Humboldt Mountain (HM) (04-013-9508)
Location: Humboldt Mountain
Summit
Spatial Scale: Regional
Monitoring Type: Maximum Ozone
Concentrations

Site Description: This site became operational in August 1995. The Humboldt Mountain site is
located on Federal Aviation Agency property, in a National Forest Service building in the Tonto
National Forest. This site is located approximately 40 miles north-northeast of the Phoenix
metropolitan area at an elevation of 5190 feet. Ozone is the only criteria pollutant that is monitored at
this SLAMS site.
Ozone

2010
0.074
0
0.071

Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year avg. of 4th High

*Indicates an exceedance of the standard.
#Indicates a violation of the standard.

2012 Air Monitoring Network Review

68

2011
0.088
6
0.071

2012
0.082
10
0.075

Maricopa County Air Quality Department

Mesa (ME) (04-013-1003)
Location: Broadway Rd. and
Brooks Ave.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: This site is located at the City of Mesa Brooks Reservoir at the western edge of the city near
the Tempe border. It is centered in an area that contains residential, industrial, and a small amount of
agricultural activity. An open field borders the site on the west with commercial development to the north, and
light industry east and south of the site. Carbon monoxide, ozone, PM2 5, and PM10 are the criteria pollutants
monitored at this SLAMS site. The department started operation of the PM2 5 Federal Reference Method
monitor in May 2005. In December 2012, following an operational hiatus during a ten-month site construction
by the City of Mesa, the site began operation again with new continuous PM10 and PM2 5 monitors replacing the
filter-based monitors. A new ozone monitor was also started at the site.
Carbon Monoxide
PM10
PM2 5

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Max. 24-hr PM2 5 Avg. (µg/m3)
Number of Daily Exceedances
Annual PM2 5 Avg. (µg/m3)
98th Percentile Value (µg/m3)

* Indicates an exceedance of the standard
#Indicates <75% data completeness

2012 Air Monitoring Network Review

69

2010
1.4
0
86
0
17.4
14.0
0
6.25
11.8

2011
1.5
0
127
0
26.7
102.3*
1
8.9
20.4

2012
1.4
0
64
0#
22.8
23.3
0#
8.5
23.3

Maricopa County Air Quality Department

North Phoenix (NP) (04-013-1004)
Location: 7th St. and Butler Ave.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: This site is located in the Sunnyslope area of North Phoenix. Sunnyslope is an older
established neighborhood, primarily residential. High-density population surrounds the site. CO,
ozone, PM2.5 and PM10 (all SLAMS) are monitored at this site, along with delta temperature
(temperature inversion).
Carbon
Monoxide
Ozone
PM10
PM2 5

2010
1.7
0
0.085*
6
0.077#
44
0
19.3
N/A
N/A
N/A
N/A

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year Avg. of 4th High
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Max. 24-hr PM2 5 Avg. (µg/m3)
Number of Daily Exceedances
Annual PM2 5 Avg. (µg/m3)
98th Percentile Value (µg/m3)

2011
1.6
0
0.090*
8
0.078#
186*
2
26.5
46.9*+
1+
9.3+
23.0+

*Indicates an exceedance of the standard.
#Indicates a violation of the standard
+Represents less than a year of observations (2895 observations)
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

70

2012
1.5
0
0.091
10
0.081#
178*‡
1
32.4
30.1
0
9.3
21.2

Maricopa County Air Quality Department

Pinnacle Peak (PP) (04-013-2005)
Location: Pima Rd & Pinnacle
Peak
Spatial Scale: Urban
Monitoring Type: Maximum Ozone
Concentrations

Site Description: This SLAMS site for ozone was formerly located on the roof of a golf course
country club surrounded by residential homes, though from November 2011 through July 2012 it was
shut down and moved ½ mile south to a maintenance yard following a request by the property owner.
It is located in a geographic area of low-density population (less than 2500 people per square mile). In
the current and previous years, ozone exceedances have been recorded due to transport of ozone and
precursors from more urbanized areas of metropolitan Phoenix.
Ozone

2010
0.080*
4
0.073

Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year Avg. of 4th High

*Indicates an exceedance of the standard
#Indicates a violation of the standard

2012 Air Monitoring Network Review

71

2011
0.088*
4
0.075

2012
0.082*
6
0.077#

Maricopa County Air Quality Department

Rio Verde (RV) (04-013-9706)
Location: Forest Rd. and Del Ray
Ave.
Spatial Scale: Urban
Monitoring Type: Maximum Ozone
Concentrations

Site description: This ozone site became operational in spring of 1997. The monitor is located at the
fire station / County Sheriff’s office sub-station located in a residential area surrounded by the desert of
Tonto National Forest. The site is eight miles north of the Fountain Hills SLAMS station, on the edge
of a Class I Wilderness Area.
Ozone

2010
0.078*
1
0.073

Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year Avg. of 4th High

*Indicates an exceedance of the standard
#Indicates a violation of the standard.

2012 Air Monitoring Network Review

72

2011
0.088*
6
0.073

2012
0.076*
2
0.074

Maricopa County Air Quality Department

South Phoenix (SP) (04-013-4003)
Location: Central Ave. and
Broadway Rd.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: The site was opened at its current location in October 1999. The site is at the edge of a high
population area, but also borders on a mixture of residential and commercial (retail stores, food establishments,
and office parks) land use. The station has two high population areas (>5000 people per square miles) north and
west of the site. Carbon monoxide, ozone, and PM10 (all SLAMS) are the criteria pollutants monitored at this
station. The department started operation of a PM2 5 FRM filter-based monitor in May 2005. A continuous
Thermo Scientific 1405 PM2 5 monitor started operation at this site in December 2008. This monitor is classified
as a Federal Equivalent Method (FEM), and therefore the data can be used for compliance purposes within
AQS. The filter-based PM2 5 FRM was shut down in July 2012.
Carbon
Monoxide
Ozone
PM10
PM2 5

2010
3.1
0
0.076*
1
0.072
120
0
35.0
63.4*
(82.6*)
#
1 (2)#
9.23
(7.98)#
24.0

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year Avg. of 4th High
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Max. 24-hr PM2 5 Avg. (µg/m3)
Number of Daily Exceedances
Annual PM2 5 Avg. (µg/m3)
98th Percentile value (µg/m3)

2011
2.6
0
0.081*
4
0.072
420*
9
47.7
62.0*
(60.8*)#

2012
2.3
0
0.087*
5
0.076
342*‡
3
47.9
70.0*
(70.8)#

2 (4)#
11.4
(9.33)#
27.2

0 (2)#
11.5
(9.2)#
24.4

*Indicates an exceedance of the standard.
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.
#First number is filter-based monitor; second number (in parenthesis) is continuous monitor.
2012 Air Monitoring Network Review

73

Maricopa County Air Quality Department

South Scottsdale (SS) (04-013-3003)
Location: Thomas Rd. and Miller
Rd.
Spatial Scale: Neighborhood,
Urban (NO2)
Monitoring Type: Population
Exposure

Site Description: The South Scottsdale site is located at a City of Scottsdale Fire Station. The area
surrounding the site is residential with a density of 2500 to 5000 persons per square mile. This site is
located 12 miles east of metropolitan Central Phoenix. Carbon monoxide, ozone, and PM10 (all
SLAMS) are the criteria pollutants monitored at this station. SO2 monitoring was discontinued in 2010
due to extremely low values being recorded. The SO2 monitor was moved the Durango Complex site,
which is closer to SO2 point sources. NO2 monitoring was discontinued in 2011. Continuous PM
monitors replaced filter based monitors on September 1, 2012.
Carbon
Monoxide
Ozone
PM10
Nitrogen Dioxide
Sulfur Dioxide

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year Avg. of 4th High
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Annual NO2 Avg. (PPB)
NO2 1-hour Average 98th Percentile (PPB)
Max. 24-hr SO2 Avg. (PPB)
Number of Exceedances SO2
Annual SO2 Avg. (PPB)

2010
1.6
0
0.084*
4
0.075
37
0
17.4
13.92
53.0
3
0
1.3

2011
1.4
0
0.083*
3
0.074
119
0
25.8
15.5
54.0

2012
1.3
0
0.086*
7
0.077#
102
0
31.6

*Indicates an exceedance of the standard.
#Indicates a violation of the standard.
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

74

Maricopa County Air Quality Department

Tempe (TE) (04-013-4005)
Location: Apache Blvd. & College
Ave.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: The site was established in 2000 to fill in a spatial gap between the metropolitan
Phoenix area and the city of Mesa. Ozone and carbon monoxide (both SLAMS) are monitored at the
site, and continuous PM10 and PM2.5 monitors (SLAMS) were added in 2012. Wind speed and
direction and delta temperature (temperature inversion) meteorological parameters are also monitored
at this site.
Carbon
Monoxide
Ozone
PM10
PM2 5

2010
1.9
0
0.075
0
0.071
N/A
N/A
N/A
N/A
N/A
N/A
N/A

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year Avg. of 4th High
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Max. 24-hr PM2 5 Avg. (µg/m3)
Number of Daily Exceedances
Annual PM2 5 Avg. (µg/m3)
98th Percentile Value (µg/m3)

*Indicates an exceedance of standard.
#Indicates a violation of the standard.

2012 Air Monitoring Network Review

75

2011
3.2
0
0.076*
1
0.068
N/A
N/A
N/A
N/A
N/A
N/A
N/A

2012
1.6
0
0.078
1
0.070
169*
1
31.6
23.1
0
9.27
19.5

Maricopa County Air Quality Department

West Chandler (WC) (04-013-4004)
Location: Frye Rd. and Ellis St.
Spatial Scale: Neighborhood,
Middle (PM10)
Monitoring Type: Population
Exposure

Site Description: This site was first established in January 1995. The site was moved one half mile to
the southeast in May 2000 when the Chandler fire station that hosts it relocated. A wide range of land
uses surround the site including residential, agriculture, and heavy industry (semiconductor
manufacturing plants and liquid air storage). Carbon monoxide, ozone, and PM10 are the criteria
pollutants monitored at this SLAMS site. In September 2009 the PM10 monitor was upgraded from a
1-in-6 day scheduled monitor to a continuous-monitoring TEOM. This upgrade took place in
accordance with regulations due to a PM10 exceedance which occurred at the site.
Carbon Monoxide
Ozone
PM10

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #Daily Exceedances >0.075 ppm
Three year Avg. of 4th High
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

2010
1.9
0
0.083*
2
0.074
76
0
23.3

*Indicates an exceedance of the standard.
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.
#Indicates a violation of the standard.

2012 Air Monitoring Network Review

76

2011
1.4
0
0.079*
3
0.073
669*
7
47.9

2012
1.4
0
0.082*
2
0.074
402*‡
5
36.1

Maricopa County Air Quality Department

West 43rd Avenue (WF) (04-013-4009)
Location: 43rd Ave. & Broadway
Rd.
Spatial Scale: Middle
Monitoring Type: Highest
Concentrations

Site Description: Monitoring began at the site in the 2nd quarter of 2002. This site is located at a
Maricopa County Department of Transportation storage lot and is surrounded by a combination of
heavy industry and residential homes. The site has one continuous TEOM PM10 monitor and a
temperature inversion monitor, as well as other meteorological instruments. The main purpose of the
site is to measure maximum concentration PM10 and to determine the impact on ambient pollution
levels of significant sources or source categories. The sources around the site include sand and gravel
operations, auto and metal recycling facilities, landfills, paved and unpaved haul roads, and cement
casting.
PM10

2010
112
0
39.4

Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

2011
369*‡
7
47.9

*Indicates an exceedance of the standard.
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

77

2012
254*‡
6
50.5

Maricopa County Air Quality Department

West Phoenix (WP) (04-013-0019)
Location: 39th Ave. and Earll Dr.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure,
Highest Concentration (PM2.5)

Site Description: This site became operational in 1984. The spatial scale for the West Phoenix site is
neighborhood. It is located in an area of stable, high-density residential population. CO, PM10, PM2.5,
O3, and NO2 (All SLAMS) are the criteria pollutants monitored at this site. The department operates
collocated PM2.5 FRM filter-based monitors and a continuous PM2.5 FEM monitor (SLAMS) at this
site.
Carbon
Monoxide
Ozone
PM10
PM2 5

Max. 8-hr CO Avg. (PPM)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (PPM)
O3 #of Daily Exceedances >0.075 ppm
Three year Avg. of 4th High
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Max. 24-hr PM2 5 Avg. (µg/m3)
Number of Daily Exceedances
Annual PM2 5 Avg. (µg/m3)

Nitrogen
Dioxide

98th Percentile Value
Annual NO2 Avg. (PPB)
NO2 1-hour Average 98th Percentile (PPB)

2010
4.3
0
0.082*
2
0.074
86
0
29.8
53.3*
(55.3*)#
1 (2)#
8.36
(7.60)#
21.6
17.72
55.0

2011
3.0
0
0.086*
5
0.074
279
8
48.0
30.6
(99.1*)#
0 (4)#
10.2
(11.6)#
31.5
18.0
55.0

*Indicates an exceedance of the standard.
#Indicates a violation of the standard.
#First number is filter-based monitor; second number (in parenthesis) is continuous monitor.
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.
2012 Air Monitoring Network Review

78

2012
3.9
0
0.087*
9
0.078#
189*‡
1
46.9
112.6*
(89.1*)#
2 (2)#
12.0
(10.4)
29.0
19.4
58.0

Maricopa County Air Quality Department

Zuni Hills (ZH) (04-013-4016)
Location: 109th Ave. and Deer
Valley Road.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: This site was opened in December 2009 and is located on the campus of the Zuni
Hills elementary school, which is approximately 1.7 miles to the northeast from the now closed Coyote
Lakes monitor. Coyote Lakes was a source-oriented, middle scale PM10 site that was situated in the
Agua Fria River bottom adjacent to sand and gravel mines; Zuni Hills replaces this with a populationoriented neighborhood scale site that is situated on the higher-elevation river bank. This site will
theoretically be able to represent the air quality for a larger area and a greater number of people.
PM10

3

Max. 24-hr PM10 Avg. (µg/m )
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

2010
70
0
20.7

*Indicates an exceedance of the standard.
‡Indicates Exceptional Events at this site. Listed value is the highest official current AQS reading.

2012 Air Monitoring Network Review

79

2011
411*‡
4
28.4

2012
285*‡
1
49.1

Maricopa County Air Quality Department

APPENDIX II - EPA REQUIRED DATA
Details compliance with requirements of 40CFR58 §58.10 and Appendices A, C, D, and E

2012 Air Monitoring Network Review

80

Maricopa County Air Quality Department

Required General Statement Regarding Changes to the PM2.5 Network
In the event the department needed to move or change a violating PM2 5 monitor the following
procedure would be followed: The department would hold a public hearing regarding the requested
change. Details and documentation of the requested change, as well as all public comments, would
then be forwarded to the EPA for approval. Any action on the department’s part will be dependent on
EPA approval.
Please note that the previous statement is general in nature and is required to be placed in the annual
network review by 40CFR58. The department does not currently have any violating PM2.5 monitors,
nor does it have any proposals to move any PM2.5 monitors.
Notes regarding appendix data
Analysis Method (filters only) refers to the method used to process filter-based particulate samples.
Distance from Supporting Structure refers to those sample probes that are attached to a supporting
structure, such as the side of a building. In most cases the sample probe is located above the
supporting structure, in which case the entry will say N/A.
Distance from Obstructions refers to those obstructions, both on the roof and off the roof, which are
located higher than the probe. In the case of a nearby obstruction being higher than the probe, details
of its location will be listed in the entry. If there are no obstructions higher than the probe, then the
entry will be N/A.
Last Annual Performance Evaluation Date refers to the performance evaluations detailed in
40CFR58, Appendix A, §3.2.2. These performance evaluations are performed by an agency outside of
MCAQD. At least 25% of the network should be evaluated once per calendar quarter.
Last Two Semi-Annual Flow Rate Audit Dates refers to the performance evaluations detailed in
40CFR58, Appendix A, §3.2.4. These performance evaluations are performed by an agency outside of
MCAQD at least once every six months.
Probe Sample Line Material refers to the material makeup of the intake sample lines.
Pollutant Sample Residence Time refers to the amount of time that it takes a sample of air to travel
between the probe inlet and the monitor. This residence time is calculated by a formula that is based
on the sample line diameter and length and the flow rate of the air intake. It is important to keep this
residence time low so as to prevent gases in the air sample from reacting with the sample line material
or with other gases in the sample; e.g. ozone could react with nitrogen oxide in the air sample if the
residence time exceeds 20 seconds. This measurement only applies to NO2, SO2, and O3 monitors.

2012 Air Monitoring Network Review

81

Maricopa County Air Quality Department

BLUE POINT

County ID: BP
AQS ID: 04-013-9702
Address: Bush Highway & Usery Pass Road, Maricopa County
Coordinates: 33.54549N – 111.60925W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

82

Ozone
Continuous
N/A
No
N/A
26
3
Yes
Submitted July 2013
Bi-Weekly
N/A
API M400 (087)
01/01/1993
SLAMS
FEM
Max Ozone Concentration
Urban
Jan-Dec
Yes
N/A
5.3 meters
360º
Teflon
7.6 sec
N/A
N/A
N/A
N/A
Bush Highway
160 meters, South
1,000
Paved

Maricopa County Air Quality Department

BUCKEYE

County ID: BE
AQS ID: 04-013-4011
Address: 26449 W 100th DR, Buckeye
Coordinates: 33.37005N – 111.62070W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5
NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted
to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of
Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Distance from Supporting Structure
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

Ozone
Continuous
N/A
No
N/A

CO
Continuous
N/A
No
N/A

NO2
Continuous
N/A
No
N/A

PM10
Continuous
N/A
No
N/A

26
4
Yes

15
2
Yes

26
4
Yes

23
2
Yes

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
N/A
Bi-Weekly

API M400
(087)
08/01/2004
SLAMS
FEM

API M300
(093)
08/01/2004
SLAMS
FRM

API M200
(099)
08/01/2004
SLAMS
FRM

Thermo TEOM
1400AB (079)
08/01/2004
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Sep-Mar
Yes

Source
Oriented
Urban
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A
4 meters
360º
N/A
Teflon
4.0 sec
N/A
N/A
14 meters, N
US Hwy 85
31 meters, N
3,000
Paved

N/A
4 meters
360º
N/A
Teflon
N/A
N/A
N/A
14 meters, N
US Hwy 85
31 meters, N
3,000
Paved

N/A
4 meters
360º
N/A
Teflon
4.0 sec
N/A
N/A
14 meters, N
US Hwy 85
31 meters, N
3,000
Paved

N/A
4.5 meters
360º
N/A
N/A
N/A
N/A
N/A
14 meters, N
US Hwy 85
31 meters, N
3,000
Paved

83

Maricopa County Air Quality Department

CAVE CREEK

County ID: CC
AQS ID: 04-013-4008
Address: 37019 N Lava Lane, Phoenix
Coordinates: 33.82169N – 112.01739W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

84

Ozone
Continuous
N/A
No
N/A
26
4
Yes
Submitted July 2013
Bi-Weekly
N/A
API M400 (087)
07/20/2001
SLAMS
FEM
Max Ozone Concentration
Urban
Jan-Dec
Yes
N/A
4.8 meters
360º
Teflon
10.2 sec
N/A
N/A
N/A
20 meters, E
32nd Street
240 meters, NE
1,000
Paved

Maricopa County Air Quality Department

CENTRAL PHOENIX

County ID: CP
AQS ID: 04-013-3002
Address: 1645 E Roosevelt, Phoenix
Coordinates: 33.45793N - 112.04601W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move
Monitor?
Is site suitable for comparison to
PM2.5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed
Annually
# Accuracy Checks Performed
Annually
All Precision/Accuracy Reports
Submitted to AQS?
Annual Data Certification
Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate
Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number
of Monitors Required?
-Appendix E Requirements
Distance between collocated
samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

Ozone
Continuous
N/A
No

CO
Continuous
N/A
No

NO2
Continuous
N/A
No

SO2
Continuous
N/A
No

PM10
Continuous
N/A
No

N/A

N/A

N/A

N/A

N/A

27

26

25

25

23

5

4

5

2

2

Yes

Yes

Yes

Yes

Yes

Submitted
July 2013
Bi-Weekly
N/A

Submitted July
2013
Bi-Weekly
N/A

Submitted July
2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted July
2013
N/A
Bi-Weekly

API M400
(087)

API M300
(093)

API M200
(099)

API M100
(100)

Thermo TEOM
1400AB (079)

06/01/1967
SLAMS
FEM

10/01/1966
SLAMS
FRM

01/01/1967
SLAMS
FRM

01/01/1965
SLAMS
FEM

04/01/1985
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Highest
Concentration
Neighborhood
Jan-Dec
Yes

Highest
Concentration
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A

N/A

N/A

N/A

N/A

11.3 meters
360
Teflon
9.0 sec
N/A
N/A
N/A
N/A
16th Street
88 meters, W
24,000
Roosevelt St.
75 meters, N
Unknown
Paved

11.3 meters
360
Teflon
N/A
N/A
N/A
N/A
N/A
16th Street
88 meters, W
24,000
Roosevelt St.
75 meters, N
Unknown
Paved

11.3 meters
360
Teflon
9.0 sec
N/A
N/A
N/A
N/A
16th Street
88 meters, W
24,000
Roosevelt St.
75 meters, N
Unknown
Paved

11.3 meters
360
Teflon
10.0 sec
N/A
N/A
N/A
N/A
16th Street
88 meters, W
24,000
Roosevelt St.
75 meters, N
Unknown
Paved

11.3 meters
360
N/A
N/A
N/A
N/A
N/A
N/A
16th Street
91 meters, W
24,000
Roosevelt St.
75 meters, N
Unknown
Paved

2012 Air Monitoring Network Review

85

Maricopa County Air Quality Department

DEER VALLEY

County ID: DV
AQS ID: 04-013-4018
Address: 1030 West Deer Valley Road, Phoenix
Coordinates: 33.684627N -112.08635W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

86

Lead
1 in 6 day
Filters sent out to independent
laboratory for weighing
No
N/A
25 (collocated)
1
Yes
Submitted July 2013
N/A
Semi-Annual
Hi-Q TSP Sampler (109)
07/01/2010
SLAMS
FRM
Source Oriented
Middle Scale
Jan-Dec
Yes
2.7 meters
4.1 meters
360º
N/A
N/A
N/A
N/A
N/A
N/A
Deer Valley
300 meters, S
6,452
Paved

Maricopa County Air Quality Department

DURANGO COMPLEX

County ID: DC
AQS ID: 04-013-9812
Address: 2702 RC Esterbrooks Blvd, Phoenix
Coordinates: 33.42650N -112.11814W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule

PM10
Continuous

PM2.5
Continuous

SO2
Continuous

Analysis Method (filters only)

N/A

N/A

N/A

Any Proposal to Remove or Move Monitor?

No

No

No

Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?

N/A

Yes

N/A

# Precision Checks Performed Annually
# Accuracy Checks Performed Annually

24
3

25
3

26
3

All Precision/Accuracy Reports Submitted to AQS?

Yes

Yes

Yes

Annual Data Certification Submitted?

Submitted
July 2013

Submitted
July 2013

Submitted
July 2013

Frequency of One-Point QC Check

N/A

N/A

Bi-Weekly

Frequency of Flow Rate Verification

Bi-Weekly

Bi-Weekly

N/A

Sampler Make & Model

Thermo TEOM
1400AB (079)

API M100 (100)

Date Established

07/01/1999

Thermo FDMSTEOM 1400AB
(181)
07/01/2005

Classification

SLAMS

SLAMS

SLAMS

Method (FRM, FEM, ARM)

FEM

FEM

FRM

Highest
Concentration

Highest
Concentration

Highest
Concentration

Monitoring Scale

Middle

Middle

Middle

Sampling Season

Jan-Dec

Jan-Dec

Jan-Dec

Network Meets Minimum Number of Monitors Required?

Yes

Yes

Yes

-Appendix E Requirements
Distance between collocated samplers

N/A

N/A

N/A

Probe Inlet Height

3.9 meters

4.8 meters

3.9 meters

Airflow Arc

360º

360º

360º

Probe Sample Line Material

N/A

N/A

Teflon

Pollutant Sample Residence Time

N/A

N/A

10.0 sec

Distance from Supporting Structure
Distance from Obstructions

N/A
N/A

N/A
N/A

N/A
N/A

Distance to Furnace Flue

N/A

N/A

N/A

Spacing from Trees

14 meters, S

14 meters, S

14 meters, S

-Appendix A Requirements

-Appendix C Requirements

-Appendix D Requirements
Monitoring Type

th

Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

87

th

01/01/2011

27 Ave

27 Ave

27th Ave

78 meters, E

76 meters, E

76 meters, E

16,000
Paved

16,000
Paved

16,000
Paved

Maricopa County Air Quality Department

DYSART

County ID: DY
AQS ID: 04-013-4010
Address: 16825 N Dysart Rd, Surprise
Coordinates: 33.63713N – 112.34184W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS
per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to
AQS?
Annual Data Certification Submitted?

Ozone
Continuous
N/A
No
N/A

CO
Continuous
N/A
No
N/A

PM10
Continuous
N/A
No
N/A

26
5
Yes

15
2
Yes

24
2
Yes

Submitted
July 2013

Submitted
July 2013

Submitted
July 2013

Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model

Bi-Weekly
N/A

Bi-Weekly
N/A

N/A
Monthly

API M400 (087)

API M300 (093)

Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type

7/21/2003
SLAMS
FEM

09/01/2003
SLAMS
FRM

Thermo TEOM
1400AB (079)
07/14/2003
SLAMS
FRM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Sep-Mar
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A
3.3 meters
360º
Teflon
4.8 sec
N/A
N/A
N/A
N/A
Dysart
17 meters, W
12,000
Bell Rd
495 meters, N
43,000
Paved/Gravel

N/A
3.3 meters
360º
Teflon
N/A
N/A
N/A
N/A
N/A
Dysart
17 meters, W
12,000
Bell Rd
495 meters, N
43,000
Paved/Gravel

N/A
2.6 meters
360º
N/A
N/A
N/A
N/A
N/A
N/A
Dysart
12 meters, W
12,000
Bell Rd
460 meters, N
43,000
Paved/Gravel

Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

88

Maricopa County Air Quality Department

FALCON FIELD

County ID: FF
AQS ID: 04-013-1010
Address: 4530 E McKellips Rd, Mesa
Coordinates: 33.45223N – 111.73331W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

89

Ozone
Continuous
N/A
No
N/A
26
4
Yes
Submitted July 2013
Bi-Weekly
N/A
API M400 (087)
06/01/1989
SLAMS
FEM
Population Exposure
Neighborhood
Jan-Dec
Yes
N/A
9.3 meters
360º
Teflon
16.4 sec
N/A
N/A
N/A
N/A
McKellips
58 meters, S
29,000
Paved

Maricopa County Air Quality Department

FOUNTAIN HILLS

County ID: FH
AQS ID: 04-013-9704
Address: 16426 E Palisades Blvd, Fountain Hills
Coordinates: 33.61103N – 111.72529W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part
58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

90

Ozone
Continuous
N/A
No
N/A

27
5
Yes
Submitted July 2013
Bi-Weekly
N/A
API M400 (087)
04/01/1996
SLAMS
FEM
Max Ozone Concentration
Neighborhood
Jan-Dec
Yes
N/A
4.3 meters
360º
Teflon
4.8 sec
N/A
Canopy 1 meter higher than probe,
located 9 meters to the south
N/A
15 meters, W
Palisades Blvd
70 meters, SW
8,000
Paved

Maricopa County Air Quality Department

GLENDALE

County ID: GL
AQS ID: 04-013-2001
Address: 6001 W Olive, Glendale
Coordinates: 33.56936N – 112.19153W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per
Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model

Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

Ozone
Continuous
N/A
No
N/A

CO
Continuous
N/A
No
N/A

PM10
Continuous
N/A
No
N/A

PM2.5
Continuous
N/A
No
Yes

26
4
Yes
Submitted
July 2013
Bi-Weekly
N/A

16
2
Yes
Submitted
July 2013
Bi-Weekly
N/A

24
2
Yes
Submitted
July 2013
N/A
Bi-Monthly

24
2
Yes
Submitted
July 2013
N/A
Bi-Monthly

API M400 (087)

API M300 (093)

Thermo TEOM
1400AB (079)

Thermo FDMSTEOM 1400AB
(181)

01/01/1974
SLAMS
FEM

01/01/1974
SLAMS
FRM

07/01/1987
SLAMS
FEM

6/1/2011
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Sep-Mar
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A
3.7 meters
360º
Teflon
4.5 sec
N/A
N/A
N/A
N/A
Olive Ave
225 meters, S
25,000
59th Ave
475 meters, E
30,500
Paved

N/A
3.7 meters
360º
Teflon
N/A
N/A
N/A
N/A
N/A
Olive Ave
225 meters, S
25,000
59th Ave
475 meters, E
30,500
Paved

N/A
3.4 meters
360º
N/A
N/A
N/A
N/A
N/A
N/A
Olive Ave
227 meters, S
25,000
59th Ave
430 meters, E
30,500
Paved

N/A
4.0 meters
360º
N/A
N/A
N/A
N/A
N/A
N/A
Olive Ave
227 meters, S
25,000
59th Ave
430 meters, E
30,500
Paved

91

Maricopa County Air Quality Department

GREENWOOD

County ID: GR
AQS ID: 04-013-3010
Address: 1128 N 27th Ave., Phoenix
Coordinates: 33.46093N – 112.11748W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per
Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

CO
Continuous
N/A
No
N/A

NO2
Continuous
N/A
No
N/A

PM10
Continuous
N/A
No
N/A

26
2
Yes
Submitted
July 2013
Bi-Weekly
N/A

27
4
Yes
Submitted
July 2013
Bi-Weekly
N/A

24
2
Yes
Submitted
July 2013
N/A
Bi-Weekly

API M300 (093)

API M200 (099)

11/01/1993
SLAMS
FRM

11/01/1993
SLAMS
FRM

Thermo TEOM
1400AB (079)
11/01/1993
SLAMS
FEM

Population
Exposure
Middle
Jan-Dec
Yes

Population
Exposure
Middle
Jan-Dec
Yes

Population
Exposure
Middle
Jan-Dec
Yes

N/A
4.2 meters
360º
Teflon
N/A
N/A
N/A
N/A
20 meters, NW
27th Ave
10 meters, E
18,500
I-10
85 meters, N
229,000
Paved

N/A
4.2 meters
360º
Teflon
4.3 sec
N/A
N/A
N/A
20 meters, NW
27th Ave
10 meters, E
18,500
I-10
85 meters, N
229,000
Paved

N/A
4.4 meters
360º
N/A
N/A
N/A
N/A
N/A
20 meters, NW
27th Ave
10 meters, E
18,500
I-10
85 meters, N
229,000
Paved

92

Maricopa County Air Quality Department

HIGLEY

County ID: HI
AQS ID: 04-013-4006
Address: 15400 South Higley Road, Gilbert
Coordinates: 33.31074N – 111.72255W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

93

PM10
Continuous
N/A
No
N/A
26
2
Yes
Submitted July 2013
N/A
Bi-Weekly
Thermo TEOM 1400AB
(079)
07/01/2000
SLAMS
FEM
Population Exposure
Neighborhood
Jan-Dec
Yes
N/A
2.9 meters
360º
N/A

N/A
N/A
N/A
N/A
N/A
Higley Rd
117 meters, E
11,500
Williams Field Rd
410 meters, S
11,500
Paved

Maricopa County Air Quality Department

HUMBOLDT MOUNTAIN

County ID: HM
AQS ID: 04-013-9508
Address: Seven Springs Rd-FAA Radar Station, Tonto National Forest
Coordinates: 33.98280N – 111.79870W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway

Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

94

Ozone
Continuous
N/A
No
N/A
26
4
Yes
Submitted July 2013
Bi-Weekly
N/A
API M400 (087)
01/01/1993
SLAMS
FEM
Max Ozone Concentration
Regional
Jan-Dec
Yes
N/A
4.5 meters
360º
Teflon
6.2 sec
N/A
N/A
N/A
N/A
N/A (Remote mountaintop
site, only reachable by small
access road)
N/A
N/A
Dirt/Vegetated

Maricopa County Air Quality Department

MESA

County ID: ME
AQS ID: 04-013-1003
Address: 310 S Brooks, Mesa
Coordinates: 33.41045N – 111.86507W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per
Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

Ozone
Continuous
N/A
No
N/A

CO
Continuous
N/A
No
N/A

PM2.5
Continuous
N/A
No
Yes

PM10
Continuous
N/A
No
N/A

4
1
Yes
Submitted
July 2013
Bi-Weekly
N/A

6
4
Yes
Submitted
July 2013
Bi-Weekly
N/A

4
1
Yes
Submitted
July 2013
N/A
Bi-Weekly

4
1
Yes
Submitted
July 2013
N/A
Bi-Weekly

API M400
(087)

API M300
(093)

Thermo FDMSTEOM 1405-DF
(182)

Thermo TEOM
1400AB (079)

11/1/2012
SLAMS
FEM

01/01/1978
SLAMS
FEM

11/1/2012
SLAMS
FEM

11/1/2012
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Sep-Mar
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A
7 meters
360º
Teflon
N/A
N/A
N/A
N/A
N/A
Broadway Rd.
305 meters, S
33,000
Paved/Gravel

N/A
7 meters
360º
Teflon
N/A
N/A
N/A
N/A
N/A
Broadway Rd.
305 meters, S
33,000
Paved/Gravel

N/A
6.9 meters
360º
N/A
N/A
N/A
N/A
N/A
N/A
Broadway Rd.
305 meters, S
33,000
Paved/Gravel

N/A
6.2 meters
360º
N/A
N/A
N/A
N/A
N/A
N/A
Broadway Rd.
305 meters, S
33,000
Paved/Gravel

95

Maricopa County Air Quality Department

NORTH PHOENIX

County ID: NP
AQS ID: 04-013-1004
Address: 601 E Butler Dr., Phoenix
Coordinates: 33.56033N – 112.06626W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5
NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to
AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of
Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

Ozone
Continuous
N/A
No
N/A

CO
Continuous
N/A
No
N/A

PM10
Continuous
N/A
No
Yes

PM2.5
Continuous
N/A
No
N/A

26
5
Yes

15
2
Yes

25
2
Yes

25
2
Yes

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
N/A
Bi-Weekly

Submitted
July 2013
N/A
Bi-Weekly

API M400
(087)
01/01/1975
SLAMS
FEM

API M300
(093)
01/01/1974
SLAMS
FRM

BAM 1020
(122)
9/1/2011
SLAMS
FEM

BAM 1020
(122)
9/1/2011
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Sep-Mar
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A
4.6 meters
360º
Teflon
5.0 sec
N/A
N/A
N/A
N/A
7th Street
75 meters, E
32,000
Gravel

N/A
4.6 meters
360º
Teflon
N/A
N/A
N/A
N/A
N/A
7th Street
75 meters, E
32,000
Gravel

N/A
4.5 meters
360º
N/A
N/A
N/A
N/A
N/A
N/A
7th Street
75 meters, E
32,000
Gravel

N/A
4.5 meters
360º
N/A
N/A
N/A
N/A
N/A
N/A
7th Street
75 meters, E
32,000
Gravel

96

Maricopa County Air Quality Department

PINNACLE PEAK

County ID: PP
AQS ID: 04-013-2005
Address: 25000 N Windy Walk, Scottsdale
Coordinates: 33.71231N – 111.85272W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

97

Ozone
Continuous
N/A
No
N/A
14
2
Yes
Submitted July 2013
Bi-Weekly
N/A
API M400 (087)
02/01/1988
SLAMS
FEM
Max Ozone Concentration
Urban
Jan-Dec
Yes
N/A
5.9 meters
360º
Teflon
6.2 sec
N/A
N/A
N/A
N/A
Happy Valley Rd.
61 meters, S
16,000
Paved/Grass

Maricopa County Air Quality Department

RIO VERDE

County ID: RV
AQS ID: 04-013-9706
Address: 25608 N Forest Rd., Rio Verde
Coordinates: 33.71881N – 111.67183W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

98

Ozone
Continuous
N/A
No
N/A
27
4
Yes
Submitted July 2013
Bi-Weekly
N/A
API M400 (087)
01/01/1997
SLAMS
FEM
Max Ozone Concentration
Urban
Jan-Dec
Yes
N/A
6.2 meters
360º
Teflon
9.7 sec
N/A
N/A
N/A
16 meters, S
Forest Rd
43 meters, E
Unknown
Paved

Maricopa County Air Quality Department

SOUTH PHOENIX

County ID: SP
AQS ID: 04-013-4003
Address: 33 W Tamarisk, Phoenix
Coordinates: 33.40316N – 112.07533W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move
Monitor?
Is site suitable for comparison to PM2.5
NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted
to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model

Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of
Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

Ozone
Continuous
N/A

CO
Continuous
N/A

PM2.5
1 in 3 day
Filters Weighed
In-House

PM2.5
Continuous
N/A

PM10
Continuous
N/A

No

No

No

No

No

N/A

N/A

Yes

Yes

N/A

27
4
Yes

15
2
Yes

N/A
3
Yes

24
3
Yes

24
2
Yes

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
N/A
Every 6 Weeks

Submitted
July 2013
N/A

Submitted
July 2013
N/A
Bi-Monthly

API M400
(087)

API M300 (093)

Thermo 2025

Thermo TEOM
1400AB (079)

10/01/1999
SLAMS
FEM

10/01/1999
SLAMS
FRM

01/01/2005
SLAMS
FRM

Thermo FDMSTEOM 1405-DF
(182)
05/01/2010
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Sep-Mar
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A
4.9 meters
360
Teflon
6.9 sec
N/A
N/A
N/A
N/A
Central Ave
168 meters, E
24,000
Broadway Rd
385 meters, N
18,000
Paved

N/A
4.9 meters
360
Teflon
N/A
N/A
N/A
N/A
N/A
Central Ave
168 meters, E
24,000
Broadway Rd
385 meters, N
18,000
Paved

N/A
5.5 meters
360
N/A
N/A
N/A
N/A
N/A
N/A
Central Ave
168 meters, E
24,000
Broadway Rd
385 meters, N
18,000
Paved

N/A
5.5 meters
360
N/A
N/A
N/A
N/A
N/A
N/A
Central Ave
168 meters, E
24,000
Broadway Rd
385 meters, N
18,000
Paved

N/A
5.4 meters
360
N/A
N/A
N/A
N/A
N/A
N/A
Central Ave
165 meters, E
24,000
Broadway Rd
385 meters, N
13,000
Paved

2012 Air Monitoring Network Review

99

7/1/2007
SLAMS
FEM

Maricopa County Air Quality Department

SOUTH SCOTTSDALE

County ID: SS
AQS ID: 04-013-3003
Address: 2857 N Miller Rd., Scottsdale
Coordinates: 33.47968N – 111.91721W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5
NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to
AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of
Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

Ozone
Continuous
N/A
No
N/A

CO
Continuous
N/A
No
N/A

NO2
Continuous
N/A
No
N/A

SO2
Continuous
N/A
No
N/A

PM10
Continuous
N/A
No
N/A

26
5
Yes

15
2
Yes

13
2
Yes

26
5
Yes

24
2
Yes

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
N/A
Bi-Monthly

API M400
(087)
01/01/1974
SLAMS
FEM

API M300
(093)
01/01/1974
SLAMS
FRM

API M200
(099)
10/01/1975
SLAMS
FRM

API M100
(100)
01/01/1984
SLAMS
FEM

TEOM 1405
(079)
09/01/2012
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Sep-Mar
Yes

Population
Exposure
Urban
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A
5.8 meters
360
Teflon
7.3 sec
N/A
N/A
N/A
14 meters, S
Thomas
66 meters, N
33,000
Miller
32 meters, W
13,000
Paved

N/A
5.8 meters
360
Teflon
N/A
N/A
N/A
N/A
14 meters, S
Thomas
66 meters, N
33,000
Miller
32 meters, W
13,000
Paved

N/A
5.8 meters
360
Teflon
7.3 sec
N/A
N/A
N/A
14 meters, S
Thomas
66 meters, N
33,000
Miller
32 meters, W
13,000
Paved

N/A
5.8 meters
360
Teflon
12.1 sec
N/A
N/A
N/A
14 meters, S
Thomas
66 meters, N
33,000
Miller
32 meters, W
13,000
Paved

6.5 meters
6.1 meters
360
N/A
N/A
N/A
N/A
N/A
14 meters, S
Thomas
62 meters, N
33,000
Miller
35 meters, W
13,000
Paved

100

Maricopa County Air Quality Department

TEMPE

County ID: TE
AQS ID: 04-013-4005
Address: 1525 S College, Tempe
Coordinates: 33.4124N – 111.93473W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per
Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?

Ozone
Continuous
N/A
No
N/A

CO
Continuous
N/A
No
N/A

PM10
Continuous
N/A
No
N/A

PM2.5
Continuous
N/A
No
Yes

26
4
Yes
Submitted July 2013

15
2
Yes
Submitted July 2013

Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model

Bi-Weekly
N/A

Bi-Weekly
N/A

22
4
Yes
Submitted July
2013
N/A
Bi-Weekly

16
4
Yes
Submitted July
2013
N/A
Bi-Weekly

API M400 (087)

API M300 (093)

Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type

07/01/2000
SLAMS
FEM

07/01/2000
SLAMS
FRM

Thermo TEOM
1400 AB (079)
3/1/2012
SLAMS
FEM

Thermo 1405 DF
(182)
3/1/2012
SLAMS
FEM

Population Exposure

Population Exposure

Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)

Neighborhood
Jan-Dec
Yes

Neighborhood
Sep-Mar
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A
4.4 meters
360
Teflon
4.5 sec
N/A
N/A
N/A
N/A
College Ave
11 meters, W
Unknown (secondary
street)
Apache
370 meters, N
25000
Gravel

N/A
4.4 meters
360
Teflon
N/A
N/A
N/A
N/A
N/A
College Ave
11 meters, W
Unknown (secondary
street)
Apache
370 meters, N
25000
Gravel

N/A
2.7 meters
360
N/A
N/A
N/A
N/A
N/A
N/A
College Ave
11 meters, W
Unknown
(secondary street)
Apache
370 meters, N
25000
Gravel

N/A
3.7 meters
360
N/A
N/A
N/A
N/A
N/A
N/A
College Ave
11 meters, W
Unknown
(secondary street)
Apache
370 meters, N
25000
Gravel

Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

101

Maricopa County Air Quality Department

WEST CHANDLER

County ID: WC
AQS ID: 04-013-4004
Address: 275 S Ellis, Chandler
Coordinates: 33.29898N – 111.88431W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per
Part 58.30?
-Appendix A Requirements

Ozone
Continuous
N/A
No
N/A

CO
Continuous
N/A
No
N/A

PM10
Continuous
N/A
No
N/A

# Precision Checks Performed Annually

26

15

24

# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?

4
Yes
Submitted
July 2013
Bi-Weekly
N/A

2
Yes
Submitted
July 2013
Bi-Weekly
N/A

2
Yes
Submitted
July 2013
N/A
Monthly

API M400 (087)

API M300 (093)

Thermo TEOM
1400 AB (079)

07/01/2000
SLAMS
FEM

07/01/2000
SLAMS
FRM

07/01/2000
SLAMS
FRM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Sep-Mar
Yes

Population
Exposure
Middle
Jan-Dec
Yes

N/A
4.4 meters
360º
Teflon
4.6 sec
N/A
N/A
N/A
14 meters, E
Frye Rd
23 meters, S
Unknown
(secondary street)
Ellis St
73 meters, W
Unknown
(secondary street)
Paved/Gravel

N/A
4.4 meters
360º
Teflon
N/A
N/A
N/A
N/A
14 meters, E
Frye Rd
23 meters, S
Unknown
(secondary street)
Ellis St
73 meters, W
Unknown
(secondary street)
Paved/Gravel

N/A
4.4 meters
360º
N/A
N/A
N/A
N/A
N/A
14 meters, E
Frye Rd
25 meters, S
Unknown
(secondary street)
Ellis St
71 meters, W
Unknown
(secondary street)
Paved/Gravel

Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

102

Maricopa County Air Quality Department

WEST 43RD AVENUE

County ID: WF
AQS ID: 04-013-4009
Address: 3940 W Broadway, Phoenix
Coordinates: 33.40642N – 112.14434W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

103

PM10
Continuous
N/A
No
N/A
24
1
Yes
Submitted July 2013
N/A
Bi-Weekly
Thermo TEOM 1400AB (079)
04/01/2002
SLAMS
FEM
Highest Concentrations
Middle
Jan-Dec
Yes
N/A
5 meters
360º
N/A

N/A
N/A
N/A
N/A
N/A
Broadway Road
37 meters, SE
Unknown
Gravel

Maricopa County Air Quality Department

WEST PHOENIX

County ID: WP
AQS ID: 04-013-0019
Address: 3847 W Earll, Phoenix
Coordinates: 33.48385N – 112.14257W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)

PM2.5
Continuous
N/A

PM10
Continuous
N/A

No

PM2.5
1 in 3 days
Filters
Weighed InHouse
No

No

No

N/A

N/A

Yes

Yes

N/A

26

26

25

23

24

4

3

4

26
(Collocated)
2

4

2

Yes

Yes

Yes

Yes

Yes

Yes

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
Bi-Weekly
N/A

Submitted
July 2013
N/A
Every 6 weeks

Submitted July
2013
N/A
Bi-Weekly

Submitted
July 2013
N/A
Bi-Weekly

API M400
(087)

API M300
(093)

API M200
(099)

Thermo 2025

BAM 1020
(170)

BAM 1020
(122)

01/01/84
SLAMS
FEM

01/01/84
SLAMS
FRM

05/24/90
SLAMS
FRM

06/13/00
SLAMS
FRM

09/01/05
SLAMS
FEM

02/01/88
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

Highest
Concentration
Neighborhood
Jan-Dec
Yes

Highest
Concentration
Neighborhood
Jan-Dec
Yes

Population
Exposure
Neighborhood
Jan-Dec
Yes

N/A

N/A

N/A

2.3 meters

N/A

N/A

4.3 meters
360

4.3 meters
360

4.3 meters
360

Probe Sample Line Material
Pollutant Sample Residence
Time

Teflon

Teflon

Teflon

2.8 meter
360
N/A

3.6 meter
360
N/A

2.7 meters
360
N/A

4.4 sec

N/A

4.4 sec

N/A

N/A

N/A

Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

N/A
N/A
N/A
N/A
Thomas
360 meters, S
29,000
Gravel

N/A
N/A
N/A
N/A
Thomas
360 meters, S
29,000
Gravel

N/A
N/A
N/A
N/A
Thomas
360 meters, S
29,000
Gravel

N/A
N/A
N/A
N/A
Thomas
360 meters, S
29,000
Gravel

N/A
N/A
N/A
N/A
Thomas
360 meters, S
29,000
Gravel

N/A
N/A
N/A
N/A
Thomas
360 meters, S
29,000
Gravel

Any Proposal to Remove or Move
Monitor?
Is site suitable for comparison to

PM2 5 NAAQS per Part 58.30?

-Appendix A Requirements
# Precision Checks Performed
Annually
# Accuracy Checks Performed
Annually
All Precision/Accuracy Reports
Submitted to AQS?
Annual Data Certification
Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate
Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number
of Monitors Required?
-Appendix E Requirements
Distance between collocated
samplers
Probe Inlet Height
Airflow Arc

Ozone
Continuous
N/A

CO
Continuous
N/A

NO2
Continuous
N/A

No

No

N/A

2012 Air Monitoring Network Review

104

Maricopa County Air Quality Department

ZUNI HILLS

County ID: ZH
AQS ID: 04-013-4016
Address: 10851 West Williams Rd., Sun City, AZ
Coordinates: 33.68674N, -112.29417W
Metropolitan Sampling Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2 5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Checks Performed Annually
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

2012 Air Monitoring Network Review

105

PM10
Continuous
N/A
No
N/A
24
2
Yes
Submitted July 2013
N/A
Bi-Weekly
Thermo TEOM 1400AB (079)
12/01/09
SPM
FEM
Population Exposure
Neighborhood Scale
Jan-Dec
Yes
N/A
2.3 meters
360º
N/A
N/A

N/A
N/A
N/A
N/A
Williams Rd
200 meters, N
Unknown (residential street)
Lawn/Dirt

Maricopa County Air Quality Department

APPENDIX III - PUBLIC NOTICE AND COMMENT INFORMATION
Public Notice Period
To fulfill the requirements of 40CFR58 §58.10, the Maricopa County Air Quality Department
posted a draft copy of this Network Review on its website on August 30, 2012. In an effort to
notify the public of its network review, the department published information on a Network
Review Public Workshop through the following outlets:
•

News item on department website.

•

Electronic feed to subscribers.

•

Public Notice posted in the Arizona Republic, a newspaper of general circulation in
Maricopa County.

News Release
The following is a copy of the news release that was advertised in the Arizona Republic:
Public Notice
The Maricopa County Air Quality Department will hold a public meeting to discuss its 2012 Air
Monitoring Network Review on October 23, 2013 at 1:00 p.m. The meeting will be held at the
Air Monitoring Division’s offices at 2145 S. 11th Ave. suite 170, Phoenix, AZ 85007.
A copy of the draft network review is currently available on the department’s website at the
following website address: http://www.maricopa.gov/aq/divisions/monitoring/network.aspx
Hard copies of the document may be requested from the department’s Records Management
Coordinator at (602) 506-6201 or at the department's address: 1001 North Central Avenue,
Phoenix, Arizona 85004. Arrangements may be made to view the information every Monday
through Friday (excluding major holidays) between 8:00 a.m. and 4:30 p.m. There is a small fee
for copying available documents.
The 2012 Air Monitoring Network Review covers ambient air monitoring activity captured by
the department’s 24 air monitoring sites throughout 2012. The Air Monitoring Network Review
also provides a summary of the pollutants measured by Maricopa County, a look at the air
monitoring network design and monitoring site details and statistics from the past year among
other information. Additional information on the draft Air Monitoring Network Review may be
obtained by contacting Ben Davis at 2145 S 11th Avenue #170, Phoenix, AZ 85007 or (602)
258-5155 x221.
The purpose of the October 23, 2013 public meeting is to receive comments from the public on
the draft Network Review. Members of the public may comment in person or through written
statements to the department.

2012 Air Monitoring Network Review

106

Maricopa County Air Quality Department

Written comments shall state the name and mailing address of the person making comment and
be signed by that person or authorized agent or attorney. Written comments on the draft
document are due to the department by October 23, 2013 at 5:00 p.m.
A sign language and/or Spanish interpreter will be made available upon request with 72 hour
notice. Additional reasonable accommodations will be made available to the extent possible
within the time frame of the request.

2012 Air Monitoring Network Review

107

Maricopa County Air Quality Department

Public Meeting Announcement:

NEWS

for immediate release
MARICOPA CO UNTY
Air Quality
1001 North Central Avenue
Phoenix, p.z. 85004
Ph 602-506-6713
www ma.-icopa.gov

2012 Air Monitoring Network Review
The Maricopa County Air Quality Department will hold a public meeting to discuss its 2012 Air Monitoring
Network Review on October 23, 2013 at 1:00 p.m. The meeting will be held at the Air Monitoring Division's
offices at 2145 S. 11th Ave., Suite 170, Phoenix, AZ 85007.
A copy of the draft netv.•ork review is cwTently available on the department's website at the following website
address: http://www.maricopa.gov/aq/ divisions /monitoring/network.aspx.
Hard copies of the document may be requested from the department's Records Management Coordinator at (602)
506-6201 or at the department's address: 1001 North Central Avenue, Phoenix, Arizona 85004. Alrnngements may
be made to view the infonnation every Monday through Friday (excluding major holidays) between 8:00 am. and
4:30 p.m. There is a small fee for copying available documents.
The 2012 Air Monitoring Network Review covers ambient air monitoring activity captmed by the depa1tment's 24
air monitoring sites throughout 2012. The Air Monitoring Network Review also provides a summary of the
pollutants measmed by Maricopa County, a look at the air monitoring netv.•ork design and monitoring site details
and statistics from the past year among other infonnation.
The purpose of the October 23, 2013 public meeting is to receive comments from the public on the draft Netv.•ork
Review. Members of the public may comment in person or through written statements to the department.
Written comments shall state the name and mailing address of the person making comment and be signed by that
person or authorized agent or attomey. Written comments on the draft document are due to the deprutment by
October 23, 2013 at 5:00 p.m.
A sign language and/or Spanish interpreter will be made available dming the public meeting upon request. The
department asks for 72 homs' notice in order to make necessa1y a1rnngements. Additional reasonable
accommodations will be made available to the extent possible within the time frame of the request.
Additional information on the Air Monitoring Network Review may be obtained by contacting Ben Davis at 2145 S
11th Ave., Suite 170, Phoenix, AZ 85007 or (602) 258-5155 x221.
About M aricopa County Ail' Quality Department

The Maricopa County Air Quality Deprutment is a regulat01y agency whose goal is to ensme federal clean air
standards are achieved and maintained for the residents and visitors of Maricopa County. The deprutment is
govemed by the Maricopa County Board of Supervisors and follows air quality standards set fo1th by the federal
Clean Air Act.
The department offers air quality infonnation and resomces on its Clean Air Make More website. Visit
www.CleanAirMakeMore.com to lerun more.
Follow us on Twitter: http://twitter.com/cleanainnakemor
Friend us on Facebook: www.facebook.com/CleanAirMakeMore

2012 Air Monitoring Network Review

108

Maricopa County Air Quality Department

Attendees List:

2012 Air Monitoring Network Review

109

Maricopa County Air Quality Department