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The City of Cody is pleased to provide the annual Drinking Water Quality Report. This report provides detailed information on the quality of drinking water distributed to City of Cody customers. We encourage you to contact the City Water Department at 587-2958 with questions about the report or the water distribution system. We appreciate your interest in the report and are happy to answer any questions you may have. Annual Drinking Water Quality Report January 2010 - December 2010 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. Keith Viles 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 Exceeds Standards During 2010, water supplied to City of Cody residents has met or been of higher quality than is required by the Safe Drinking Water Standards in 2010. The City of Cody reports there were no violations of the drinking water requirements. The City of Cody and the Shoshone Municipal Pipeline routinely monitor for contaminants in your drinking water according to Federal and State laws. The attached table shows the results of our monitoring for the period of January 1st to December 31st, 2010. 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 North Fork and the South 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. 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 Zero Total Coliform Positive Results. No more than 1 positive for systems that collect less than 40 samples/month Naturally present in the environment Turbidity NTU 0.03-0.09 0.09 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* ppm 90th percentile for the 2010 testing was 0.001 ppm. No sampling sites exceeded the AL. 0.015 AL Corrosion of household plumbing Copper * ppm 90th percentile for the 2010 testing was 0.11 ppm. No sampling sites exceeded the AL. 1.3 AL Corrosion of household plumbing Nitrate ppm 0.09 0.09 10 10 Corrosion of household plumbing Sodium ppm 16 16 Total Trihalomethanes ppb 18.0-21.0 20 By-product of drinking water disinfectant. Total Haloacetic Acids (HAA5) ppb 16.0-21.0 19 By-product of drinking water disinfectant. Hexachlorocyclopentadiene** ppb 0.09 0.09 50 By-product of Agricultural useage Secondary Standard Sulfate ppm 13 13 6.5-8.5 pH pH 7.79-8.54 8.19 Average 15 (Color Unit) Chlorine ppm 0.50-1.50 1.19 500 mg/L Total Dissolved Solids ppm 71-103 90 Average Calcium ppm 28-46 38 Average Hardness ppm 38-62 51 Average Iron ppm 0.001-0.032 0.009 Average Total alkalinity as CaCO3 ppm 46-70 59 Average Giardia #/100L 0 0 Crytosporidium #/100L 0 0 Definitions: Max Risidual Disinfectant Level Goal 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 complaince with the Stage II Disinfectant By-Products Rule and these results are provided within the report. Microbiological Contaminants 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. was tested for in 2009. ***RAA -Running Annual Average SDWA - Safe Drinking Water Act. * = For Lead and Copper, the testing was completed in 2010. Some of our data in the tables are more than one year old since cetain chemical contaminants are monitored less than once a year. Our sampling frequency complies with EPA drinking water regulations. mg/L - Milligrams per Liter. g/L - Micrograms per Liter