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Annual Drinking Water Quality Report January 2016 - December 2016 CITY OF CODY WATER SUPPLY Public Information Available If you share a meter, manage an apartment complex, or own properties where bills are not sent to the resident, we ask that you share this report with the water customers who are not being billed. The purpose of this report is to inform you about the quality of water and services we deliver to you every day. Our goal is to provide you with a constant supply of safe and dependable drinking water. For questions about this report or your water utility, phone Mr. James Kennan at the City Shop, 587-2958, or visit with him at the City Shop between 8:00 am and 3:30 pm. The City Shop is located at 120 19th Street, Cody, Wyoming. It is important that our customers be informed about their water utility. We encourage you to learn more by attending the regularly scheduled City Council meetings at 7:00 pm on the first and third Tuesday of each month. The City Council acts as the Water Board for the City of Cody. The City obtains its water from the Shoshone Municipal Pipeline Water Treatment Plant. The Shoshone Municipal Pipeline Board meetings are held on the second Monday of each month at 10:00 AM at their Water Treatment Plant. Water Quality of Higher Quality than Standards During 2016, water supplied to City of Cody residents has met or been of higher quality than is required by the Safe Drinking Water Standards in 2016. The City of Cody and the Shoshone Municipal Pipeline routinely monitor for contaminants in your drinking water according to Federal and State laws. Water sampling and monitoring results for the period of January 1st to December 31st, 2016 may be reviewed at the City of Cody Web site www.cityofcody-wy.gov and also at the SMP Web Site www.shoshonemunicipalpipeline.org. All 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 the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency’s (EPA) Safe Drinking Water Hotline ([PHONE REDACTED]). Water Supply The City’s water source is the Shoshone Municipal Pipeline Water Treatment Plant located at the base of Cedar Mountain just west of Cody. The Shoshone Water Treatment Plant is a state-of-the-art plant using conventional treatment processes of coagulation, flocculation, sedimentation, filtration and disinfection. The water that the Shoshone Water Treatment Plant treats is from the Buffalo Bill Reservoir. Water from the N. Fork and the S. Fork of the Shoshone River discharges into the reservoir and travels through the Bureau of Reclamation's Spirit Mountain Energy Dissipation Structure pipe system to the treatment plant. After treatment, the water is delivered to the City of Cody via Shoshone Municipal’s Pipeline and thence to your faucet through the City of Cody's water distribution system. Primary sources of drinking water include rivers, lakes, streams, ponds, reservoirs, springs and wells. As water travels over the surface of the land or through the ground, it can dissolve naturally-occurring minerals and, in some cases, radioactive materials. The water can also pick up substances such as: Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural operations and wildlife Inorganic contaminants, such as salts and metals, which can be naturally-occurring or result from urban runoff, industrial or domestic wastewater discharges, oil and gas production, mining or farming Pesticides and herbicides, which may come from agricultural, urban storm water runoff, and residential uses Organic chemical contaminants, which can come from industrial processes, gas stations, urban storm water runoff and septic systems Radioactive contaminants, which can be naturally-occurring or the result of oil and gas production and mining activities. In order to ensure that tap water is safe to drink, EPA establishes regulations which limit the amount of certain contaminants in water provided by public water systems. The Food and Drug Administration establishes limits for contaminants in bottled water which must provide the same protection for public health. 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. We 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 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. Special Information Available 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/CDC guidelines on appropriate means to lessen the risk of infection by and other microbiological contaminants are available from the Safe Drinking Water Hotline ([PHONE REDACTED]). Maximum Contaminant Levels (MCL’s) MCL’s are set at very stringent levels. A person would have to consume 2 liters of water every day of his/her lifetime at the MCL level to have a one-in-a-million chance of having the described health effect. The Cody Water Department works around the clock to provide top quality water to every tap. All customers are asked to help protect our water sources, which are the heart of our community, our way of life and our children’s future. ---PAGE BREAK--- Parameter Unit of Measurement Range of Detection Level Detected MCL MCLG Likely Source of Parameter Total Coliform Bacteria No positive detects. No more than 1 positive sample in a sample in a month for systems that collect less than 40 samples/month. 0 Naturally present in the environment. Filtering problem or cats rubbing on faucet areas. Turbidity NTU 0.03-0.08 0.08 single highest sample. 100% of samples were below the turbidity limit. MCL = No single sample above 1, 95% of samples must be below 0.3 ntu 0 Soil run off Lead* (Tested in 2016) ppm ND-0.002 90th percentile for the 2016 testing was 0.001 ppm. No sampling sites exceeded the AL. 0.015 AL Corrosion of household plumbing Copper * (Tested in 2016) ppm ND-0.071 90th percentile for the 2016 testing was 0.035 ppm. No sampling sites exceeded the AL. 1.3 AL Corrosion of household plumbing Nitrate ppm 0.05 0.05 10 10 Fertilizer Sodium ppm 16 16 (no MCL) Total Trihalomethanes*** - 208 Roberts Street ppb 32.0 32.0 80 By-product of drinking water disinfectant. Total Haloacetic Acids (HAA5)*** - 208 Roberts Street ppb 25.0 25 60 By-product of drinking water disinfectant. Total Trihalomethanes*** - 5537 Greybull Hwy ppb 31.0 31.0 80 By-product of drinking water disinfectant. Total Haloacetic Acids (HAA5)*** - 5537 Greybull Hwy ppb 24.0 24.0 60 By-product of drinking water disinfectant. Uranium ppb 0.25 0.25 30 Gross Alpha pCi/L 2.0 2.0 15 Combined Radium pCi/L 0.10 0.10 5 Sulfate ppm 26 26 Secondary Standard pH pH 7.71-8.43 8.08 Average 6.5-8.5 Chlorine ppm 0.5-1.5 1.209 Average Total Dissolved Solids ppm 93-115 105 Average 500 mg/L Calcium ppm 36-54 45 Average Hardness ppm 50-67 58 Average Total alkalinity as CaCO3 ppm 47-72 61 Average **Giardia #/100L 0 0 #/100L 0 0 Max Residual Disinfectant Level Goal Nephlometric Turbidity Units (NTU) - Measurement of turbidity in drinking water ND - Not Detected. (Ave.) - Average of test results Maximum Contaminant Level Goal (MCLG) - The level of a contaminant in drinking water below which there is no known or expected risk to health. ppm - Parts per Million. ppb - Parts per Billion. #/100 L - Number of organisms per 100 Liters of water. N/A - Not Applicable Shoshone Municipal Pipeline's and the City of Cody's sampling frequency complies with EPA drinking water regulations. ***RAA - Running Annual Average. The City is currently only required to sample once a year for disinfection by-products.The Shoshone Municipal Pipeline has a web site showing their water sampling results and they can be found at www.shoshonemunicipalpipeline.org. City of Cody also has a web site where our Consumer Confidence Report can be viewed www.cityofcody-wy.gov SDWA - Safe Drinking Water Act. * = For Lead and Copper, the testing was completed in 2016. Some of our data in the tables is more than one year old since certain contaminants are monintored less than once a year. Our sampling frequency complies with EPA drinking water regulations. Giardia and were sampled in 2015. mg/L - Milligrams per Liter. mg/L - Micrograms per Liter. pCi/l - Pico Curies per Liter CITY OF CODY - Treated Water Quality Secondary Standards and Unregulated Contaminants Maximum Contaminant Level (MCL) - The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the as feasible using the best available treatment technology. Inorganic Contaminants Disinfection By-products Action Level (AL) - The concentration of a contaminant that triggers treatment or other requirement that a water system must follow. Action Levels are reported at the 90th percentile for homes at greatest risk. Stage II Disinfectant By-Product Rule - The City of Cody completed samples in 2007 for compliance with the Stage II Disinfectant By-Products Rule and these results are provided within the report. Microbiological Contaminants Radionuclides (All Radionuclides were tested in 2013) Definitions: