Contaminants in Water 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. The sources of drinking water (both tap water 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 can pick up substances resulting from the presence of animals or from human activity. Contaminants that may be present in source water before we treat it include: Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, 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 & herbicides, which may come from a variety of sources such as agriculture and residential use. Radioactive contaminants, which are naturally occurring. Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and also can come from gas stations, urban stormwater runoff, and septic systems. 2 0 1 7 WATER QUALITY REPORT Spanish (Español) Este informe contiene información muy importante sobre la calidad de su agua potable. Por favor lea este informe o comuniquese con alguien que pueda traducir la información. A R I Z O N A
Drinking Water Sources The Prescott Valley Water System serves a population of about 48,460 people in four different water systems and serves an average of 5.14 million gallons of fresh water to our customers every single day. Our water comes from aquifers below the ground and is chlorinated before it is put into our water system. We maintain a chlorine residual of 0.20 0.77 mg/l to keep the system free from bacteria. PV Water (Upper) System serves a population of more than 36,180, has approximately 15,075 service connections and pumps an average of 3.85 million gallons per day. PV Water (Lower) System serves a population of more than 6,278, has approximately 2,616 service connections and pumps an average of 642,400 gallons per day. Mingus West Water System was developed in 1999 and became a public water system in 2000. The system serves a population of more than 259, has approximately 108 service connections including the Yavapai County Fairgrounds and pumps an average of 80,000 gallons per day. Viewpoint Water System was developed in 1996 and became a public water system in January of 1997. The system serves a population of more than 5,743 and has approximately 2,393 service connections and pumps an average of 565,800 gallons per day. If you are unsure of which region you reside in; please call (928) 759-3070 or refer to the enclosed water service area map. Water Quality Monitoring To ensure that tap water is safe to drink, EPA prescribes regulations that limit the amount of certain contaminants in water provided by public water systems. We treat our water according to EPA s regulations. Food and Drug Administration regulations establish limits for contaminants in bottled water. Your Water Meets All State and Federal Regulations Your Water Meets All State and Federal Regulations Last year we conducted more than 3,000 tests for over 65 drinking water contaminants. This brochure is a snapshot of the quality of the water we provided in 2017. Included are details about where your water comes from, what it contains, and how it compares to Environmental Protection Agency (EPA) standards. We are committed to providing you with the information because we want you to be informed. For more information about your water, please call the Utilities Department at (928)759-3070. Special Population Advisory 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 about drinking water from their health care providers. EPA/Center For Disease Control guidelines on how to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline 800-426-4791. Lead Advisory 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. Prescott Valley Water System 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 the Safe Drinking Water Hotline or at http://www.epa.gov/safewater/lead.
Water Service Area Prescott Valley Water System
Water Quality Data Table Water Quality Data Table The table in this report lists all the drinking water contaminants we detected during the 2017 calendar year. The presence of these contaminants in the water does not necessarily indicate that the water poses a health risk. Unless otherwise noted, the data presented in this table are from testing done January 1 through December 31, 2017. The state requires us to monitor for certain contaminants less than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year. Some of the data, though representative of the water quality, are more than one year old. We are required to monitor your drinking water for specific contaminants on a regular basis. Prescott Valley Upper Water #13-048 Service Area Map (Area A) Contaminants Units MCL MCLG Our Water Range of Results Sample Month & Year Violation (Y or N) Typical Source of Contamination Stage 2 Disinfectants and Disinfection By-Products Chlorine Residual ppm MRDL=4 MRDLG=4 0.45 0.20 0.67 40 samples/month Jan 2017-Dec 2017 N Water additive used to control microbes TTHMs (Total Trihalomethanes) ppb 80 N/A 13.6 2.2 13.6 7/2017 N By-product of drinking water disinfection Arsenic ppb 10 0 5.6 4.7 5.6 2/2017, 4/2017, 7/2017, 10/2017 N Nitrate ppm 10 10 1.8 0.25-1.8 2/2017 N Barium ppm 2 2 0.09 0.011 0.09 2/2016 N Chromium ppb 100 100 28 4 28 2/2016 N Fluoride ppm 4 4 0.35 0.2 0.35 2/2016 N Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits. Discharges of drilling wastes; discharge of metal refineries; Erosion of natural deposits Discharge from steel and pulp mills; Erosion of natural deposits Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories Sodium ppm N/A N/A 42 20 42 2/2016 N Erosion of natural deposits: Leaching Radioactive Contaminants Alpha emitters (Gross Alpha) pci/l 15 0 1.5 0.7 1.5 2/2016 N Erosion of natural deposits Contaminants Units AL MCLG Our Water Range of Results # of Samples Exceeding AL Sample Month & Year Violation (Y or N) Typical Source of Contamination Lead action level at consumer taps ppb 15 0 Copper action level at consumer taps ppm 1.3 1.3 90 th percentile 0 ND 4.9 0 7/2016 N 90 th percentile 0.11 ND 0.12 0 7/2016 N Corrosion of household plumbing systems; Erosion of natural deposits Corrosion of household plumbing systems; Erosion of natural deposits; Leaching from wood preservatives
Prescott Valley Lower Water #13-063 Service Area Map (Area B) Contaminants Units MCL MCLG Our Water Range of Results Sample Month and Year Violation (Y or N) Typical Source of Contamination Stage 2 Disinfectant and Disinfection By-Products Chlorine Residual ppm MRDL=4 MRDLG=4 0.54 0.30 0.77 7 samples/month Jan 2017-Dec 2017 N Water additive used to control microbes Nitrate ppm 10 10 3.9 ND 3.9 4/2017 N Arsenic ppb 10 0 7.5 3.1 7.5 5/2016 N Barium ppm 2 2 0.11 0.02 0.11 5/2016 N Chromium ppb 100 100 14 2.8-14 5/2016 N Fluoride ppm 4 4 0.50 0.16 0.50 5/2016 N Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits Discharge from steel and pulp mills; Erosion of natural deposits Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories Sodium ppm N/A N/A 31 24-31 5/2016 N Erosion of natural deposits: Leaching Volatile Contaminates Dichloromethane ppb 5 0 1.2 ND 1.2 4/2017, 7/2017, 10/2017 N Discharge from pharmaceutical and chemical factories Radioactive Contaminants Alpha emitters (Gross Alpha) pci/l 15 0 3.4 2.0 3.4 5/2016 N Erosion of natural deposits Contaminants Units AL MCLG Our Water Range of Results # of Samples Exceeding AL Sample Month & Year Violation (Y or N) Typical Source of Contamination Lead action level at consumer taps ppb 15 0 90 th percentile ND ND 1.1 0 7/2016 N Corrosion of household plumbing systems; Erosion of natural deposits Copper action level at consumer taps ppm 1.3 1.3 90 th percentile 0.15 0.01-0.2 0 72016 N Corrosion of household plumbing systems; Erosion of natural deposits; Leaching from wood preservatives
Prescott Valley Mingus Water #13-247 Service Area Map (Area C) Substance Units MCL MCLG Our Water Range of Results Sample Month and Year Violation (Y or N) Typical Source of Contamination Stage 2 Disinfectants and Disinfection By-Products Chlorine Residual ppm MRDL=4 MRDLG=4 0.45 0.35 0.55 1 sample/month Jan 2017-Dec 2017 N Disinfection of water Total TTHM s (Total Trihalomethanes) ppb 80 N/A 6.5 6.5 9/2017 N By-product of drinking water disinfection Nitrate ppm 10 10 1.4 0.76 1.4 5/2017 N Arsenic ppb 10 0 4 1.2 4.0 10/2013 N Barium ppm 2 2 0.006 0.003 0.006 10/2013 N Chromium ppb 100 100 17 1.4 17 10/2013 N Fluoride ppm 4 4 0.23 0.16 0.23 10/2013 N Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits Discharge from steel and pulp mills; Erosion of natural deposits Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories Sodium ppm N/A N/A 17 14 17 10/2013 N Erosion of natural deposits: Leaching Contaminants Units AL MCLG Our Water Range of Results # of Samples Exceeding AL Sample Month and Year Violation (Y or N) Typical Source of Contamination Lead action level at consumer taps ppb 15 0 90 th Percentile 1.5 ND 2.1 0 6/2016 N Corrosion of household plumbing systems; Erosion of natural deposits Copper action level at consumer taps ppm 1.3 1.3 90 th Percentile 0.18 0.06 0.18 0 6/2016 N Corrosion of household plumbing systems; Erosion of natural deposits; Leaching from wood preservatives
Prescott Valley Viewpoint Water #13-314 Service Area Map (Area D) Contaminants Units MCL MCLG Our Water Range of Results Sample Month and Year Violation (Y or N) Typical Source of Contamination Stage 2 Disinfectant and Disinfection By-Products Chlorine Residual ppm MRDL=4 MRDLG=4 0.50 0.27 0.72 6 samples/month Jan 2017-Dec 2017 N Disinfection of water Nitrate ppm 10 10 0.39 0.24 0.39 2/2017 N Arsenic ppb 10 0 3.5 3.5 2/2017 N Barium ppm 2 2 0.028 0.028 2/2017 n Chromium ppb 100 100 13 13 2/2017 n Fluoride ppm 4 4 0.26 0.26 2/2017 n Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits Discharge from steel and pulp mills; Erosion of natural deposits Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories Sodium ppm N/A N/A 14 14 2/2017 N Erosion of natural deposits: Leaching Contaminants Units AL MCLG Our Water Range of Results Lead action level at consumer taps ppb 15 0 Copper action level at consumer taps ppm 1.3 1.3 90 th Percentile ND 90 th Percentile 0.12 # of Samples Exceeding AL Sample Month and Year ND 0 7/2017 N 0.02 0.15 0 7/2017 N Violation (Y or N) Typical Source of Contamination Corrosion of household plumbing systems; Erosion of natural deposits Corrosion of household plumbing systems; Erosion of natural deposits; Leaching from wood preservatives
Unit Descriptions Term ppm ppb NA ND Definition ppm: parts per million, or milligrams per liter (mg/l) ppb: parts per billion, or micrograms per liter (µg/l) NA: not applicable ND: not detected Important Drinking Water Definitions Term MCL MCLG MRDL MRDLG AL Definition 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. 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. 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. Maximum residual disinfection 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. Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.