2016 Water Quality Report 1 4 Bar screen removes smaller objects and dumps them in the trash Screen keeps large debris out of the system. 2 Peoria’s water comes from surface and groundwater sources. The surface water is treated using conventional treatment technologies, ozone and biologically-active filters. Check out the process… 3 Preliminary Sedimentation (Pre-Sed) Basin allows larger particles to settle and be removed. Coagulants are added to bind small particles together, allowing them to be removed. 5 Biologically Active Filters (BAF) remove the remaining organic material. The bound particles are rapidly mixed in multiple chambers before the water moves into two more sedimentation tanks where particles can settle out. 6 Ozone gas is added to eliminate odor, improve taste and disinfect the water. Clean drinking water is stored in giant tanks all over the City. All you have to do is turn on the tap! Enjoy! The dedicated employees of Peoria's Public Works-Utilities Department work hard day and night to make sure you have the best water when you want it! 2016 WATER QUALITY REPORT ANALYTE UNITS PEORIA WATER SYSTEM 04-07-096 RANGE QUINTERO WATER SYSTEM 04-07-513 VISTANCIA WATER SYSTEM 04-07-520 AVERAGE RANGE AVERAGE RANGE AVERAGE EPA LIMIT MCL EPA LIMIT MCLG Alkalinity mg/L 112 - 208 141 116 - 136 130 ~ ~ N/A N/A Arsenic µg/L 1.1 - 18.3 5.8 2.0 - 3.2 2.7 4.4 - 4.9 4.7 10 0 Barium mg/L 0.01 - 0.12 0.04 0.12 0.12 ~ ~ 2 2 Bromate* µg/L ND - 6.1 5.8 ~ ~ ~ ~ 10 0 Chromium µg/L ND - 37 13.4 ND ND ND ND 100 100 Fluoride mg/L 0.15 - 0.66 0.29 0.33 - 0.35 0.34 0.24 - 0.26 0.25 4 N/A Gross Alpha pCi/L 1.1 - 3.9 2.4 4.7*** 4.7*** ~ ~ 15 0 Hardness Gr/gal 4 - 17 10 16 - 17 16 14 - 16 15 N/A N/A Magnesium mg/L ~ ~ 26 26 ~ ~ N/A N/A Nitrate mg/L 0.43 - 10.8 4.25 0.17 - 0.36 0.26 1.18 - 1.38 1.28 10 10 pH Units 6.9 - 8.2 7.4 7.0 - 8.4 7.9 7.4*** 7.4*** N/A N/A Selenium µg/L ND - 5.4 2.8 ND - 2.9 3.3 ~ ~ 50 50 Sodium mg/L 28 - 165 52 93 - 103 97.3 ~ ~ N/A N/A pH Total Organic Carbon % Removal % 6.3 - 64.3% 29.8% 13.1 - 29.8% 21.8% ~ ~ TT N/A Total Haloacetic Acids* µg/L ND - 23.8 11.8 ND ND ND - 5.6 2.1 60* N/A Total Trihalomethanes* µg/L 1.7 - 78.6 42.4 ND - 1.5 0.6 15.6 - 35.1 25.4 80* N/A Xylenes µg/L ND - 1.5 1.35 ND ND ND ND 10 10 Turbidity NTU 0.087 N/A 0.057 N/A ~ ~ TT=1 NTU 0 100.00% N/A 100.00% N/A ~ ~ TT=%of samples <0.3 NTU Total Coliforms Present/ Absent Fecal coliform or E. coli bacteria Present/ Absent Chlorine Residual ANALYTE mg/L UNITS 0* 0.00% 0.2 - 1.92 90TH PERCENTILE REPORTED N/A N/A 0** 0** N/A N/A 0** 0** N/A N/A POSSIBLE SOURCES 5% of monthly samples are positive KEY TO TABLE AL Action Level - The concentration of a contaminant that, if exceeded, triggers treatment or other requirements that a water system must follow. MCL Maximum Contaminant Level - 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. MCLG Maximum Contaminant Level Goal - 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. MRL Minimum Reporting Level - The lowest accurately reportable concentration. MRDL Maximum Residual Disinfectant Level - 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. MRDLG Maximum Residual Disinfectant Level Goal - 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. N/A Not Applicable. ND Not Detected. Gr/Gal Grains per Gallon. NTU Nephelometric Turbidity Unit - Measure of how light is scattered by particulate matter in water. pCi/L pico-Curies per Liter - Measure of radioactivity. mg/L parts per million - Unit of measurement equal to milligrams per liter. ug/L parts per billion - Unit of measurement equal to micrograms per liter. ng/L parts per trillion - Unit of measurement equal to nanograms per liter. TT Treatment Technique - Required process intended to reduce the level of a contaminant in drinking water. Naturally present in the environment Erosion of natural deposits Soil runoff Runoff/Leaching from soil fumigant used on soybeans, cotton, pineapples and orchards 0 0 Runoff from orchards 0 Fertilizer runoff 0.94 0.2 - 1.45 0.65 0.54 - 2 1.03 4 4 NUMBER OF SITES ABOVE AL 90TH PERCENTILE REPORTED NUMBER OF SITES ABOVE AL 90TH PERCENTILE REPORTED NUMBER OF SITES ABOVE AL EPA ACTION LEVEL (AL) EPA LIMIT MCLG Copper mg/L 0.34 None 0.685 None 0.243 None 1.3 1.3 Lead µg/L <5 None 12.1 Two 5.4 None 15 0 POSSIBLE SOURCES By-product of drinking water chlorination By-product of drinking water ozonation Water additive used to control microbes Water additive used to promote strong teeth N/A Human or animal fecal waste Discharge from steel and pulp mills Discharge from metal refineries Discharge from petroleum factories Discharge from chemical factories Discharge from mines Corrosion of home plumbing systems * MCL is based on a running annual average. The average given is the highest average. ** If a system collecting fewer than 40 samples per month has two or more positive samples in one month, the system has a MCL violation. *** Only one sample collected. ~ Not required Cryptosporidium was tested for, but not found, at Pyramid Peak and Greenway Water Treatment Plants. Due to a well pump failure in November, Nitrate was detected at a concentration of 10.8 mg/L in a sample from our Entry Point to the Distribution System #038. This result exceeded the Maximum Contaminant Level of 10 mg/L. The system was returned to compliance the day the exceedance was detected. The required 24 hour public notice was achieved through a press release and was broadcast on all of the local news channels and published in the Arizona Republic. Source Water Assessment The Arizona Department of Environmental Quality (ADEQ) performed a source water assessment for 24 wells used by the City. The assessment reviewed the adjacent land uses that may pose a potential risk to the sources. One of Peoria’s wells was found to have one adjacent land use that posed a high risk of contamination. Please understand that this one well’s high risk rating does not imply poor water quality, only its potential to becoming contaminated. The assessment report is available for review at ADEQ, 1110 W. Washington Street, Phoenix, AZ 85007 between the hours of 8 am – 5 pm. Electronic copies are available from ADEQ at dml@azdeq.gov. To learn more about water quality... Peoria: www.peoriaaz.gov/envresources or 623-773-7561 USEPA: http://water.epa.gov/drink ADEQ: www.azdeq.gov Maricopa County: www.maricopa.gov/envsvc Tap Into Quality: www.tapintoquality.com Water Use It Wisely: www.wateruseitwisely.com A Message from the Environmental Protection Agency To ensure that tap water is safe to drink, the Environmental Protection Agency (EPA) prescribes regulations that limit the amount of certain contaminants in water provided by public water systems. The Food and Drug Administration (FDA) regulations establish limits for contaminants in bottled water which must provide the same protection for public health. Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the EPA’s Safe Drinking Water Hotline (1-800-426-4791). The sources of drinking water (both tap and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and, in some cases, radioactive material and can pick up substances resulting from the presence of animals or from human activity. Following are contaminants that may be present in source water: • Microbial contaminants, such as viruses and bacteria that may be from sewage treatment plants, septic systems, agricultural livestock operations, or wildlife; • Inorganic contaminants, such as salts and metals, that can be naturally occurring or result from urban storm water runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming; • Pesticides and herbicides that may come from a variety of sources such as agriculture, urban storm water runoff and residential uses; • Organic chemical contaminants, including synthetic and volatile organic chemicals that are by-products of industrial processes and petroleum production and can also come from gas stations, urban storm water runoff and septic systems; and • Radioactive contaminants that can be naturally-occurring or can be the result of oil and gas production and mining activities. SPECIAL HEALTH INFORMATION Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly and infants can be particularly at risk from infections. These people should seek advice from their health care providers. EPA/CDC (Centers for Disease Control) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants along with more information about contaminants and potential health effects are available from the Safe Drinking Water Hotline (1-800-426-4791). Nitrate, Arsenic, Lead & Copper, Turbidity and Trihalomethanes Nitrate at levels above 10 mg/L 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 health care provider. While your drinking water meets EPA’s standard for Arsenic, it does contain low levels. EPA’s standard balances the current understanding of arsenic’s possible health effects against the costs of removing arsenic from drinking water. EPA continues to research the health effects 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. Some people who drink water containing arsenic in excess of the MCL over many years could experience skin damage or problems with their circulatory system and may have an increased risk of getting cancer. 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. The City of Peoria is responsible for providing high quality drinking water, but cannot 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 drinking 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 EPA’s Safe Drinking Water Hotline, 1-800-426-4791, or at www.epa.gov/lead. Turbidity has no health effects. However, turbidity can interfere with disinfection and provide a medium for microbial growth. Turbidity may indicate the presence of disease-causing organisms. These organisms include bacteria, viruses and parasites that can cause symptoms such as nausea, cramps, diarrhea and associated headaches. Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous systems and may have an increased risk of getting cancer. In the desert southwest, water resource management and planning are important to ensure that current and future generations have an adequate water supply. Every drop of Peoria’s drinking water is treated using modern, state-of-the-art treatment technology. Hundreds of tests are performed each day to be certain that your drinking water meets all federal, state and local water quality standards. Peoria’s conservative fiscal practices coupled with state-of-the-art technology ensure excellent value per gallon. Peoria has continuous access to its secure, diverse water sources. Quintero 100% Vistancia 100% Peoria All Other Areas Served by the City 31% Vistancia 34% 100% 35% Dedicated, certified operations and engineering personnel treat, test and deliver safe water, conveniently on demand. Water conservation is a necessary way of life in the desert southwest. Remember, Peoria has enough water to use, but never enough to waste.™ Colorado River via the Central Arizona Project Recovered (well) water Salt and Verde Rivers via the Salt River Project Este informe contiene información importante sobre su agua potable. Si usted tiene preguntas sobre este informe, por favor llame al 623-773-7561. The information and data contained in this report apply only to those who receive their water from the City of Peoria. There are several private water companies that serve residents in certain areas of the City. If you receive your water from the Sunrise, Rose Valley or EPCOR water companies, you should contact your water supplier directly for water data that affects you: Sunrise: EPCOR: 623-972-6133 Rose Valley: 623-889-2275; info@rosevalleywaterco.com Published June 2017 800-383-0834 (Agua Fria District)