Main System 10-112

2009 Annual Water Quality Report

City of Tucson Water Quality Management & Operations Division
This Annual Water
Quality Report
provides information
on your drinking water.
The United States
Environmental Protection
Agency (USEPA) requires
that all drinking water
suppliers provide a
water quality report to
their customers on an
annual basis. This report
also contains important
information on the
quality of your water and
contact information you
may wish to use.
Where does my water
come from?

Tucson Water serves about
734,000 people in the Tucson
area. The water supply
comes from approximately
200 groundwater wells
located in and around the
Tucson metropolitan area
(see map). Most of the wells
(also known as Entry Points
to the Distribution System or
EPDS) serve the neighborhood
in which they are located,
with excess supply routed to
reservoirs for use elsewhere
in the system. Tucson Water’s
system contains 28 water
service areas that are located
in and around the Tucson
metropolitan area, 4,500 miles
of pipes, and 145 booster
stations that are dedicated to
pumping drinking water.

For accommodations; materials in accessible formats; foreign language interpreters;
and/or materials in a language other than English, please contact Tucson Water
at (520) 791-4331 or (520) 791-2639 for TDD.
at least 5 business days in advance of this scheduled event.
1

Why are there contaminants in my
drinking water?

All drinking water, including bottled water, may
reasonably be expected to contain at least small
amounts of some contaminants.
Tucson’s groundwater contains dissolved minerals
and organic compounds, which have been leached
from the rock, sediments, and plant materials
through which the water travels. One would expect
to find beneficial minerals such as calcium and
magnesium, harmless minerals such as chloride,
bicarbonate, and sulfate, and metals such as iron,
copper, arsenic, and lead, which may be either
beneficial or harmless at low concentrations, but
harmful at high concentrations. In addition to these
naturally occurring contaminants, our groundwater
may contain contaminants resulting from industrial
or domestic activities. For this reason, water utilities
must currently monitor for approximately 90
regulated and 25 unregulated contaminants.
The following language is required by the USEPA
to appear in this report, some of which may not be
applicable to deep groundwater wells, the primary
source of the Tucson Water supply:
Contaminants that may be present in source water
can include:
• Microbial contaminants, such as viruses and
bacteria, which may come from sewage, septic
systems, agricultural livestock, and wildlife.
• Inorganic contaminants, such as salts and metals,
which can be naturally-occurring or result from
urban stormwater runoff, industrial or domestic
wastewater discharges, oil and gas production,
mining, or farming.
• Pesticides and herbicides, which may come from
a variety of sources such as agriculture, urban
stormwater runoff, and residential uses.
• Organic chemical contaminants, including
synthetic and volatile organic chemicals, which
are byproducts of industrial processes and
petroleum production, and can also come from
gas stations, urban stormwater runoff, and septic
systems.
• Radioactive contaminants, which can be
naturally occurring or be the result of oil and gas
production and mining activities.

Were there any contaminants detected
in my drinking water?

Tucson Water regularly monitors the drinking water
that is delivered to you to comply with drinking
water regulations set by the USEPA. In addition to
this required monitoring, Tucson Water performs
a great deal of discretionary monitoring in order
to provide both Tucson Water staff and customers
with additional water quality information. We
are pleased to report that the results from the
monitoring conducted in 2009 met all standards for
safe drinking water.
In most cases, the minimum detection level of a
contaminant is well below the USEPA regulatory
limit for that contaminant. The table on page 2 lists
the contaminants that were detected in the required
drinking water monitoring. To compare the detected
amount with the maximum amount allowed by the
USEPA, refer to the Maximum Contaminant Level
(MCL) column in the table. The vast majority of
regulated contaminants were not detected in the
drinking water delivered by Tucson Water and
those non-detected results were not included in
the table. For a complete list of all USEPA
regulated contaminants, contact the USEPA at
1-800-426-4791 or visit the USEPA Webster at
www.epa.gov/safewater/mcl.html#mcls

In order to ensure that tap water is safe to drink,
USEPA regulations limit the amount of certain
contaminants in water provided by public water
systems. Food and Drug Administration regulations
establish limits for contaminants in bottled water
that must provide the same protection for public
health. Bottled water may come from either a
surface water source or groundwater source, and
may be treated minimally or extensively. For
information on the quality of your bottled water,
contact the water bottling company.
2

Detected Contaminants Table
Contaminant

sample
year

Maximum
Result

09
09
09
09

1.4 ppb
2.1 ppb
3.5 ppb
< 2 ppb

<1 - 1.4 ppb
<1 – 2.1 ppb
<2 – 3.5 ppb

Trihalomethanes (THM)
Bromodichloromethane
09
Bromoform
09
Chloroform
09
Chlorodibromomethane
09
Total Trihalomethanes
09
Running Annual Average for TTHMS 09

2.3 ppb
5.8 ppb
1.5 ppb
5.6 ppb
14.5 ppb
6.6 ppb

<0.5 – 2.3 ppb
<0.5 – 5.8 ppb
<0.5 – 1.5 ppb
<0.5 – 5.6 ppb
<0.5 – 14.5 ppb

Disinfection By-Products
Haloacetic acids (HAA)
Dichloroacetic Acid
Dibromoacetic Acid
Total Haloacetic Acids (5)
Running Annual Average for HAA5

Range

MCL

MCLG

None
None
None

60 ppb

None
None
None
None
None

80 ppb

Inorganics
Arsenic
07-09
9.1 ppb
<2.0 – 9.1 ppb
10 ppb
0 ppb
Barium
07-09
0.15 ppm
<0.02 – 0.15 ppm 2 ppm
2 ppm
Fluoride
09
1.0 ppm
<0.1 – 1.0 ppm
4 ppm
4 ppm
Nitrate (as N)
09
7.7 ppm
<0.25 – 7.7ppm 10 ppm 10 ppm
					
Sodium
07-09
101 ppm
16 – 101 ppm
None
None

Major Sources of Contaminant

By-product of chlorination
By-product of chlorination
By-product of chlorination

By-product of chlorination
By-product of chlorination
By-product of chlorination
By-product of chlorination
By-product of chlorination

Natural deposits
Natural deposits; Industrial Uses
Natural deposits
Natural deposits; septic tanks;
agriculture; sewage
Natural deposits

Volatile Organics
Total Xylenes		
09
0.0015 ppm 0.0015-0.0015 ppm 10 ppm 10 ppm
											
Synthetic Organics
Atrazine		
07-09
1.3 ppb
<0.05-1.3 ppb
3 ppb
3 ppb
Di (2-ethylhexyl) phthalate
07-09
0.7 ppb
<0.6-0.7 ppb
6 ppb
0 ppb
Simazine
07-09
0.05 ppb
<0.05-0.05 ppb
4 ppb
4 ppb

Runoff from herbicides used on raw crops
Discharge from rubber and chemical factories
Herbicide runoff

Radioactive Chemicals
Alpha Emitters
Uranium

Natural Deposits
Natural Deposits

Contaminant
Lead
Copper
Contaminant
Chlorine

09
09

2.2 pCi/L
4.7 ppb

year
No. of Samples Above
sampled the Action Level
08
one
08
none
year
sampled
09

Annual
Average
0.86 ppm

<1.0 – 2.2 pCi/L 15 pCi/L
<1.4 – 4.7 ppb
30 ppb
90th Percentile Action
Value
Level
2.0 ppb
15 ppb
0.12 ppm
1.3 ppm

Monthly Average
Range
0.79 – 0.93 ppm

Drinking Water Terms and Definitions:

0 pCi/L
0 ppb

Solvent used in paint coatings,
adhesive, fuel

MCLG

Major Sources

0
1.3 ppm

Corrosion of household plumbing systems
Corrosion of household plumbing systems

MRDL

MCLG	

Source

4 ppm

4 ppm

Disinfection additive used to control microbes

Action level. The concentration of a contaminant which, if exceeded, triggers a treatment or other requirement
which a water system must follow.
Entry Point to the Distribution System (EPDS). All water sources are monitored at the entry point to the
distribution system before the first customer but after any required treatment.
Maximum Contaminant Level (MCL). The highest level of a contaminant that is allowed in drinking water.
MCLs are set as close to the MCLGs as feasible using the best available treatment technology. If a contaminant
is believed to cause health concerns in humans, then the MCL is set as close as practical to zero and at an
acceptable level of risk. Generally, the maximum acceptable risk of cancer is 1 in 10,000 with 70 years of
exposure.
Maximum Contaminant Level Goal (MCLG). The level of a contaminant in drinking water below which there
is no known or expected risk to health. MCLGs allow for a margin of safety.
Maximum Residual Disinfectant Level (MRDL). The highest level of a disinfectant allowed in drinking water.
There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Maximum Residual Disinfectant Level Goal (MRDLG). The level of a drinking water disinfectant below which
there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to
control microbial contaminants.
Parts Per Billion (ppb). Some constituents in water are measured in very small units. One ppb equals one
microgram per liter. For example, one part per billion equals: 2 drops of water in a 15,000 gallon backyard
swimming pool, one second of time in 31.7 years, or the first 16 inches of a trip to the moon.
Parts Per Million (ppm). One ppm equals one milligram per liter or 1000 times more than a ppb. One part per
million equals: 1/4 cup of water in a typical 15,000 gallon backyard swimming pool or one second of time in
11.6 days.
Picocurie Per Liter (pCi/l). The quantity of radioactive material in one liter which produces 2.22 nuclear
disintegrations per minute.
3

Explanation of the Data Presented in the Detected Contaminants Table:

Tucson Water routinely monitors for contaminants in your drinking water as specified in the national Primary
Drinking Water Standards and States laws. Monitoring results for the period of January 1 to December 31, 2009,
or from the most recent period, are included in the table. Certain contaminants are monitored less than once a
year because the concentrations of these contaminants are not expected to vary significantly from year to year,
or the system is not considered vulnerable to this type of contamination. If the risk is high, a waiver is denied.
If the risk is low, a waiver will be granted and the effect is a reduction in monitoring frequency. This reduction
in monitoring saves Public Water Systems money without affecting public safety. Therefore, some of the data,
though representative, may be more than one year old.

Detailed Information on Detected Contaminants
Haloacetic Acids (HAA5) are a group of chemicals
that are formed along with other disinfection
byproducts when chlorine or other disinfectants
used to control microbial contaminants in drinking
water react with naturally occurring organic
and inorganic matter in water. The regulated
haloacetic acid compounds, known as HAA5,
are monochloroacetic acid, dichloroacetic acid,
trichloroacetic acid, monobromoacetic acid, and
dibromoacetic acid. USEPA has established an MCL
of 60 parts per billion for HAA5. The annual HAA5
average for 2009, calculated from 19 locations, was
not detected at 2 ppb.
Total Trihalomethanes (TTHMs) are formed
when chlorine combines with naturally occurring
organic material in water. Since the level of organic
matter in our groundwater is extremely low, these
compounds are found at very low concentrations.
The compounds which make up the TTHMs
include bromodichloromethane, bromoform,
chlorodibromomethane, and chloroform. The
highest result for TTHM during 2009 was 14.5
ppb and the highest concentration for any of the
four compounds was 5.8 ppb for bromoform.
Compliance with the TTHM standard is based on
the running annual average concentration from 19
distribution monitoring points. The running annual
average for TTHMs in 2009 was 6.6 ppb (the MCL is
80 ppb).
Arsenic is a naturally occurring substance
commonly found in groundwater in the
southwestern United States. While your drinking
water meets USEPA’s standard for arsenic, it does
contain low levels of arsenic. USEPA’s standard
balances the current understanding of arsenic’s
possible health effects against the cost of removing
arsenic from drinking water. USEPA continues to
research the health effect of low levels of arsenic
which is a mineral known to cause cancer in
humans at high concentrations and is linked to other
health effects such as skin damage and circulatory
problems. The highest arsenic concentration
detected during 2007 - 2009 was 9.1 ppb (the MCL is
10 ppb).
Barium occurs naturally at very low concentrations
in our groundwater. The highest barium value from
2007 was 0.15 ppm (the MCL is 2 ppm).
4

Fluoride is an important naturally occurring mineral
that helps to form healthy teeth and bones. A
concentration of 1 ppm is considered optimum. At
concentrations above 2 ppm, fluoride can cause mild
discoloration of teeth, and exposure at above the MCL
of 4 ppm can cause both severe discoloration of teeth
and over many years of exposure, bone disease. The
highest level of fluoride detected during 2009 was 1.0
ppm (the MCL is 4 ppm).
Nitrate is a form of nitrogen and an important plant
nutrient. Tucson Water performs more frequent
monitoring of wells high in nitrate for extra assurance
that action can be taken when approaching the MCL.
Nitrate in drinking water at levels above 10 ppm is a
health risk for infants of less than six months of age.
High nitrate levels in drinking water can cause blue
baby syndrome. Nitrate levels may rise quickly for
short periods of time because of rainfall or agricultural
activity. If you are caring for an infant you should ask
advice from your heath care provider. The highest
level for nitrate during 2009 was 7.7 ppm (the MCL is
10 ppm).
Sodium is the sixth most abundant element on Earth
and is widely distributed in soils, plants, water, and
food. A goal of 2300 mg/day dietary sodium has been
proposed by several government and health agencies.
Drinking water containing between 30 and 60 ppm
would contribute only 2.5 % to 5% of the dietary
goal if tap water consumption is 2 L/day. Currently,
there is no MCL for sodium in drinking water. The
recommended EPA guidance level for individuals on
a very low sodium diet (500 mg/day) is 20 ppm in
drinking water. The highest sodium value in Tucson
water during 2007 - 2009 was 101 ppm. Drinking water
does not play a significant role in sodium exposure for
most individuals. Those who are under treatment for
sodium-sensitive hypertension should consult with
their health care provider regarding sodium levels
in their drinking water supply and the advisability
of using an alternative water source or point-of-use
treatment to reduce the sodium.
Total Xylenes are residual volatile organic solvents,
typically associated with the coatings used to protect
new or refurbished water pressure tanks. These low
concentration releases from pressure tank coatings
rapidly decrease as the tank ages. The highest
concentration of total xylenes detected in 2009 was
0.0015 ppm (the MCL is 10 ppm).

Detailed Information on Detected Contaminants (continued)
Synthetic Organics are generally not mobile.
Atrazine, a herbicide and possible carcinogen at high
doses, was detected at concentration of 1.3 ppb in
2007 (the MCL is 3 ppb). Simazine, also a herbicide,
was detected at concentration of 0.05 ppb in 2007
(the MCL is 4 ppb). Another SOC, di(2-ethylhexyl)
phthalate or DEHP, is the most commonly used
group of related chemicals called phthalates or
phthalic acid esters. The greatest use of DEHP is
as a plasticizer for polyvinylchloride (PVC) and
other polymers including rubber, cellulose and
styrene. Because of its very broad use in plastic and
rubber products, DEHP is frequently a laboratory
contaminant. It was detected at concentration of 0.7
ppb during 2007 (the MCL is 6 ppb).
Alpha Emitters are measure of radioactivity due to
naturally occurring minerals in groundwater. This
excludes the radioactivity contributed by either
radon or uranium. In 2009, six representative EPDS
were sampled for alpha emitters. The highest level
for alpha emitters during 2009 was 2.2 picocuries per
liter or pCi/L (the MCL is 15 pCi/L).
Uranium is a metallic element, which is highly toxic
and radioactive. The highest level for uranium
during 2009 was 4.7 ppb (the MCL is 30 ppb).
Lead and Copper are naturally occurring metals,
which are generally found at very low levels in
source waters. If present, elevated levels of lead
can cause serious health problems, especially for
pregnant women and young children. Lead in
drinking water is primarily from materials and
components associated with service lines and
home plumbing. Tucson Water is responsible for
providing high quality drinking water, but can not
control the variety of materials used in plumbing
components. When your water has been sitting for
several hours, you can minimize the potential for
lead exposure by flushing your tap for 30 seconds
to 2 minutes before using water for drinking or
cooking. If you are concerned about lead in your
water, you may wish to have your water tested.
Information on lead in drinking water, testing
methods, and steps you can take to minimize
exposure is available from the Safe Drinking Water
Hotline at http://www.epa.gov/safewater/lead.
The required lead and copper monitoring was
performed during 2008. The 90th percentile value
was 2 ppb for lead (Action Level is 15 ppb) and
0.12 ppm for copper (Action Level is 1.3 ppm).
One sample was above the action level for lead. A
second confirmation sample was collected from
this residence using the proper procedure. No lead
was detected in the second sample. There were no
samples above the action level for copper.
Chlorine Residual Disinfection is maintained
throughout the distribution system. Approximately
1 ppm of chlorine is added to the drinking water

supply at well sites,
reservoirs and other
facilities to provide
assurance that water
delivered to customers
will remain free
of microbiological
contamination. This
also ensures that the
water meets
microbiological
drinking water
standards from the time it is pumped from the
ground until it reaches the customer’s tap. Chlorine
Residual Disinfectant is measured from 247 sample
stations where the bacteriological samples are
collected monthly. The annual chlorine residual
disinfectant is calculated using the monthly chlorine
averages for the past 12 months. The annual
average for twelve months of 2009 was 0.86 ppm.
The maximum was 0.93 ppm (The Maximum
Residual Disinfectant Limit or MRDL is 4 ppm).
Unregulated Contaminant Monitoring Regulation
(UCMR) Data Availability Unregulated
contaminants are those for which USEPA has not
established drinking water standards. The purpose
of monitoring for these contaminants is to help
EPA decide whether the contaminants should
have a standard or whether a future regulation is
warranted. UCMR sampling was conducted by
Tucson Water during the second quarter of 2009,
results of which were non-detects. As a Tucson
Water customer, you have the right to know that this
data is available. If you are interested in examining
the results, please contact the Water Quality
Manaagement & Operations Division by calling
791-2544.
1,4-Dioxane was first detected in 2002. The
laboratory’s minimum reporting limit for this
chemical is 1 ppb, with the highest concentration
in 2009 at 1.3 ppb. 1,4 dioxane is used primarily
as a stabilizer in chlorinated solvents, particularly
1,1,1-trichloroethane (TCA). At this time, USEPA
has not established a drinking water standard for this
compound. Therefore, it is not listed on the Detected
Contaminant Table in page 2. However, the EPA
Office of Drinking Water has a Health Advisory Level
of 3 ppb to assist federal, state and local officials and
managers of public or community water systems in
protecting public health. Health advisories serve as
informal technical guidance and are not
legally enforceable Federal standards
and are subject to change as new
information becomes available.
The maximum value measured is
well below EPA’s health advisory.
5

Were there any monitoring failures
or violations?

Do I need to take special precautions?

At the end of each quarter, Tucson Water conducts
an internal audit of compliance monitoring records
to verify that all required monitoring has been
completed and reported to the State. There were no
monitoring failures or violations during 2009.

While the Safe Drinking Water Act regulations
are intended to protect consumers throughout
their lifetime, some people may be more
vulnerable to infections from drinking
water than the general population. These
“at-risk” populations include: immunocompromised persons such as persons with
cancer undergoing chemotherapy, people
who have undergone organ transplants,
people with HIV/AIDS or other immune
system disorders, and in some cases, elderly
people and infants. These people should seek
advice about drinking water from their health
care providers. USEPA/CDC guidelines on
appropriate means to lessen the risk of infection
by cryptosporidium and other microbial
contaminants are available from the USEPA’s

What about CAP water?

The City of Tucson has rights to approximately
144,000 acre-feet of Colorado River water per year,
delivered through the Central Arizona Project
(CAP). In 2009, the City of Tucson’s Colorado River
allocation was not used directly, but a portion of this
allocation was recharged into the aquifer. At the
end of 2009, Tucson Water was using approximately
71% of its available allocation. At the Clearwater
Renewable Resource Facility located in Avra Valley,
Tucson Water is recharging a portion of the City’s
available CAP supply by delivering the river
water to shallow basins and allowing the water
to percolate (or recharge) naturally through the
earth to reach and blend with the groundwater
below. Tucson Water began delivery of this blend of
recharged Colorado River water and groundwater in
2001. At the end of 2009, the blend was about 40%
native groundwater and 60% recharged Colorado
River water. Over time, it will contain an increasing
percentage of recharged Colorado River water.
Information on the quality of this blend is contained
in the detected contaminant table, and more
information is available on Tucson Water’s web site.

Source Water Assessment Program
(SWAP)

The Arizona Department of Environmental Quality
(ADEQ) has completed a source water assessment
for Tucson Water drinking water wells.
This assessment reviewed the adjacent land uses
that may pose a potential risk to the water sources.
These risks include, but are not limited to gas
stations, landfills, dry cleaning, agricultural fields,
wastewater treatment plants, and mining activities.
The assessment has classified approximately 1/3 of
our wells as high risks.

How is our drinking water treated?

The groundwater delivered by Tucson Water meets
all drinking water standards without treatment, with
the exception of the water supplied from the Tucson
Airport Area Remediation Project or TARP (See
below). However, approximately 1 ppm of chlorine
is added to the drinking water supply at well sites,
reservoirs and other facilities to provide assurance
that water delivered to customers will remain free
of microbiological contamination. This also ensures
that the water meets microbiological drinking water
standards from the time it is pumped from the
ground until it reaches the customer’s tap.

Tucson Water ensures the safety of its drinking water
by conducting regular monitoring of all sources. If
any contamination approaches the drinking water
MCL, the source is removed from service.
Residents can help protect our water sources by
practicing good septic system maintenance, limiting
pesticide and fertilizer use, and by taking hazardous
household chemicals to the Household Hazardous
Waste Program (visit http://www.deq.pima.gov/
waste/householdhaz.html or call 791-4502).
Source Water Assessments on file with the ADEQ are
available for public review. You may obtain a copy
by contacting the Arizona Source Water Coordinator
at (602) 771-4661.

Additionally, to elevate the pH in the Clearwater
blend, approximately 1.8 ppm of sodium hydroxide,
also known as “caustic soda”, is added to the blend
prior to delivery to customers to achieve a target pH
of 8.1. This ensures that the delivered water is not
corrosive. Corrosive
water can damage
metallic plumbing and
leach metals such as
copper and lead from
certain plumbing
fixtures (see Lead and
Copper information).

Monitoring Waivers

The Arizona Department of Environmental Quality,
the regulatory agency for all public water suppliers
in Arizona, grants waivers for certain monitoring
requirements. Waivers are granted for specific
contaminants if previous monitoring results, and/or
the land uses within a half-mile radius of the well,
allow ADEQ to conclude that the risk of
contamination by a specific substance is very low.
6

Tucson Water

PRSRT STD
US POSTAGE

P.O.Box 27210
Tucson, AZ 85726-7210

PAID

TUCSON, AZ
PERMIT NO. 426

More about TARP

Whom do I contact for more information?

The Tucson Airport Area
Remediation Project
(TARP) was developed
in order to clean and
make beneficial use of
water contaminated
with the industrial
solvent trichloroethylene
(TCE). Tucson Water
operates TARP
under an agreement
with the USEPA and
other industrial and
governmental agencies.
All costs associated with operating and maintaining
the TARP facility are fully reimbursed to Tucson
Water.

For more information on this Tucson Water report,
contact Mohsen Belyani with the Water Quality
Management and Operations Division.
Call 791-2544 or e-mail your questions to:
mohsen.belyani@tucsonaz.gov.

Tucson’s Mayor and Council set policy and direction
for Tucson Water, including those policies that may
impact water quality. Mayor and Council meetings
are normally held each Tuesday and are open to
the public. Mayor and Council meeting agendas
and other opportunities for public comment are
published at www.tucsonaz.gov/mcc. Customers of
Tucson Water may leave a recorded message on the
Mayor and Council Comment Line at (520) 791-4700.
Tucson Water in collaboration with ten community
partners and the USEPA has established the
Environmental Monitoring for Public Access and
Community Tracking Program (EMPACT) which
is designed to provide the community with more
information about your drinking water. For more
information please call 791-2666 or visit our web site
at www.tucsonaz.gov/water/

Nine wells extract the contaminated water and
deliver it through a pipeline to a treatment plant
that removes the TCE from the water. The TARP
treatment plant uses an “air stripping” process
which forces volatile contaminants such as TCE
to evaporate from the water into air. The air is
then passed through activated carbon filters,
which removes the airborne TCE. The TARP plant
is designed to treat approximately 8.4 million
gallons of water per day (or 5,800 gallon per
minute). During 2009, this plant treated a total of
approximately 2.325 billion gallons of water. The
treatment system removed 303 pounds of combined
VOCs from the groundwater.

Telephone Numbers:

Tucson Water Public Information Office
791-4331
Tucson Water Quality Management
& Operations Division 		
791-2544
Tucson Water Customer Service/Billing
791-3242
Tucson Water 24 hour Emergency
791-4133
United States Environmental Protection
Agency Safe Drinking
Water Hotline:
1-800-426-4791
USEPA Website:
www.epa.gov/safewater/

Para nuestros clients de habla español:
Éste informe contiene información muy
importante sobre la calidad de su agua
beber. Traduscalo o hable con alguien que lo
entienda bien. Para obtener una copia de este
reporte en Español, llame al (520) 791-4331.

7

Si usted desea este documento
escrito en español, por favor, llame al

791-4331

City of Tucson TDD#: 		

791-2639