ࡱ> ac`5@ bjbj22 mVXX$nnnn#3ZZZZZZZZ2222222$3R+62H(ZZH(H(2ZZ2)))H(ZZ2)H(2)$))6x-z*/ ZN 0ڱn(../20#3/6()X686/66/Z f v)!,#@ZZZ22$*D)*2007 WATER QUALITY REPORT FOR CLARENCE WATER SUPPLY This report contains important information regarding the water quality in our water system. The source of our water is groundwater. Our groundwater is drawn from the Silurian aquifer. Our water quality testing shows the following results: CONTAMINANTMCLGMCLDETECTED LEVELDATE SAMPLEDRANGE OF DETECTIONVIOLATIONSOURCETotal Coliform Bacteria0Presence of coliform bacteria in >5% of monthly samples28/1/06 8/31/06 N/A YESNaturally present in the environmentCombined radium (pCi/L)052.23/2/02 N/A NOErosion of natural depositsAlpha emitters (pCi/L)01553/2/02N/ANOErosion of natural depositsBarium (ppm)22.44 4/15/03N/ANODischarge of drilling wastes; Discharge from metal refineries; Erosion of natural depositsFluoride (ppm)44.961/1/06- 12-31/06.82 - 1.07NOWater additive which promotes strong teeth; Erosion of natural deposits; Discharge from fertilizer and aluminum factoriesLead (ppb)0AL=1546/1/04 9/30/06N/ANOCorrosion of household plumbing systems; erosion of natural deposits Copper (ppm) 1.3 AL=1.3.226/1/04 9/30/06.08 - .27 NO Corrosion of household plumbing systems; Erosion of natural depositsSodium (ppm)N/AN/A94/3/06 N/ANO Erosion of natural deposits; Added to water during treatment process Chlorine (ppm) MRDLG =4.0 MRDL=4.01.063/01/05 - 12/31/06.32-1.78 NO Water additive used to control microbesNote: Contaminants with dates indicate results from the most recent testing done in accordance with regulations. DEFINITIONS 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. 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. ppb -- parts per billion. ppm -- parts per million. N/A Not applicable ND -- Not detected Action Level (AL) The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow. 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. 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. GENERAL INFORMATION 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 posed a health risk. More information about contaminants or potential health effects can be obtained by calling the Environmental Protection Agencys Safe Drinking Water Hotline (800-426-4791). 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 Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (800-426-4791). CONTAMINANT VIOLATIONS Total Coliform. Coliforms are bacteria which are naturally present in the environment and are used as an indicator that other, potentially-harmful bacteria may be present. Coliforms were found in more samples than allowed and this was a warning of potential problems. Repeat sampling showed no coliform bacteria present in six repeat samples. The original two test sites were retested and sites upstream and downstream from both places. Our samples showed that no bacteria were present. SOURCE WATER ASSESSMENT INFORMATION The Clarence water supply obtains its water from the Silurian aquifer. The Silurian aquifer was determined to be slightly susceptible to contamination because the characteristics of the aquifer and overlying materials limit the rate at which contaminants can move through the aquifer. The wells will be somewhat susceptible to activities such as dry cleaners, gas stations, industrial sites, and municipal wastewater dischargers. A detailed evaluation of your source water was completed by the IDNR, and is available from the Clarence water supply at 563-452-3625. CONTACT INFORMATION For questions regarding this information, please contact Paul Hoffner at 563-452-3625 during the following hours: 8:00 AM 4:00 PM. Decisions regarding the water system are made at the Clarence Council meetings held on 2nd Monday at 7:00 PM at Clarence City Hall and are open to the public. 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