07 - Monthly Water Wastewater Report

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Level Pound Average/ Typical Source of Containment Contaminant(units) Bernie Result' Radon(pCU1) NM 39 Erosion of natural deposits 'This is the value used to determine compliance with federal standards.tt sometime is the highest value detect- ed and sometimes Is an average of all the detected values If it Is an average,it may contain sampling results from the previous year which Is naturally occurring in some groundwater.It poses a lung cancer risk when Radon Is a radioactive gas gas cancer released from water into air d. occurs radnognsho showering, poses or a much greater ehealthriskkstha and m�in stom- ach Cngcwr risk when it is Ingested.Because drinking water,an Alternative Maximum Contaminant Level(AMCL)of 4,000 picoCuries per liter may apply In states that have adopted an Indoor Air Program,which compels citizens,homeowners s schools and c aid Level reduce the radon threat from indoor air.For states without such a program, (MCL)of 300 pCi/t may apply-Minnesota plans to adopt an Indoor Air Program once the Radon Rule is finalized. Contaminant 90% #sites (units) MCLG AL Level over AL Typical •. rce of contaminant Copper(ppm) N/A 1.3 .54 0 out Corrosion of household plumbing 10 'systems;Erosion of natural deposits. (06/12/2002) Sims contaminants do not have Maximum Contaminant Levels established for them.These"unregulated human contami nant9/eare assessed using state standards known as health risk limits to determine If they pose levels of an unregulated contaminant are found,the response is the same as if an MCL has been exceed- ed; water system must inform its customers and take other corrective actions.In the table that follows are the unreg- ulated contaminants that were detected: Contaminant(units) Level Found Range Average Typical Source of Contaminant • (2004) Result Sodium(ppm)(11/15/2002) N/A 3.1 Erosion of natural deposits Sulfate(ppm)(11/15/2002) N/A 6,3 Erosion of natural deposits Compliance with National Primary Drinking Water Regulations The sources of drinking water(both tap water and bottled water)include rivers,fakes,streams,ponds,reservoirs, springs 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. Contaminants that may be present in source water include: Microbial contaminants,such as viruses and bacteria,which may come from sewage treatment plants,septic sys- tems,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 and herbicides,which may come from a variety of sources such as agriculture,urban stormwater runoff, and residential uses. Organic chemical contaminants,including synthetic and volatile organic chemicals,which are by-products of indus- trial processes and petroleum production,and can also come from gas stations,urban stormwater runoff,and septic sys- tents. Radioactive contaminants,which can be naturally-occurring or be the result of oil and gas production and mining activities. In order to ensure that tap water is safe to drink,the U.S.Environmental Protection Agency(EPA)prescribes regu- lations which limit the amount of certain contaminants in water provided by public water systems. Food and Drug Administration 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 con- taminants.The presence of contaminants does not necessarily indicate that water poses a health risk.More information If about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency's Safe Drinking Water Hotline at 1-800-426-4791. pSome people persons more undergoing chemotherapy,the pay,persons who have undergone oorrggaatn transplants,people th HIV/AIDS or other immune system disorders,some elderly,and Infants can be particularly at risk from Infections.mans These les sit ple should seek advice abbot drinking water from their health care providers.EPA/CDC guidelines on appropriate risk of infection by Cryptosporidtum are available from the Safe Drinking Water Hotline at 1-800-426-4791. Lake Ccuntry Echo,June 16,2005