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Kimball, Minnesota
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May 21, 2009     Tri-County News
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May 21, 2009
 

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Thursday, May 21, 2009 A copy of the water report will be available upon request at City Hall. Our supply contains high levels of iron and manganese, which do cause discoloration and / or sedimen- tation. Our water treatment plant removes the majority of the iron and manganese. The remainder is grad- ually deposited in the distribution system. We have developed a hydrant flushing plan to help remove any settled deposits. Please help by reporting water quality problems ~o the Public Works Office or by calling (320)398-8991. Your comments will help us target problem areas and provide the best quality water with the least amount of labor cost. Sincerely, Chad Johnson, City or Kimball Public Works The Cit~/of Kimball is issuing the results can view it on line at www.health.state. of monitoring done on its drinking water mn.us/divs/eh/water/swp/swa. for the period from January 1 to December Call Chad at (320~ 980-4904 if you have 31,2008. The purpose of this report is to ad- questions about the City of Kimball drink- vance consumers' understanding of drink- ing water or would like information about ing water and heighten awareness of the opportunities for public participation in need to protect precious water resources, decisions that may affect the quality of the Source of Water water. The City of Kimball provides drinking Results of Monitoring water to its residents from a groundwater No contaminants w~re detected at lev- source: two wells ranging from 48 to 59 feet els that violated federal drinking water deep, that drawwater from the Quaternary standards. However, some contaminants Water Table aquifer, were detected in trace amounts that were The water provided to customers may below legal limits. The table that follows meet drinking water standards, but the shows the contaminants that were detect- Minnesota Department of Health has also ed in trace amounts last year. (Some con- madeadeterminationastohowvulnerable taminants are sampled less frequently the source of water may be to future con- than once a year; as a result, not all con- tamination incidents. If you wish to obtain taminants were sampled for in 2008. If any the entire source water assessment regard- of these contaminants were detected the ing your drinking water, please call (651) last time theywere sampled for, they are in- 201-4700 or (800) 818-9318 (and press 5) cludedin the table alongwith the date that during normal business hours. Also, you the detection occurred.) KEY TO ABBREVIATIONS: MCLG-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. MCL-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. MRDL-Maximum Residual Disinfectant Level. MRDLG-Maximum Residual Disinfectant Level Goal. AL-Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirement which a water system must follow. 90th Percentile Level: This is the value obtained after disregarding 10 percent of the samples taken that had the highest levels. (For example, in a situation in which 10 samples were taken, the 90th percentile level is determined by disregarding the highest result, which represents 10 percent of the samples.) Note: In sitUations in which only 5 samples are taken, the average of the two with the highest levels is taken to determine-the 90th percentile level. pCi/1-PicoCuries per liter (a measure of radioactivity). ppb-Parts per billion, which can also be expressed as micrograms per liter (pg/l). ppm-Parts per million, which can also be expressed as milligrams per liter (mg/1). N/A-Not Applicable (does not apply). l,evel Found Contaminant MCLG MCL Range Average (units) " (2008) /Result* Barium (ppm) 2 2 N/A .17 (11/21/2006) Fluoride (ppm) 4 4 1 - 1.2 1.18 Haloacetic Acids (HAA5) (ppb) f09/1112007) Mercury (inorganic) (ppb) 11121/2006) Nitrate (as Nitrogen) (ppm) TTHM (Total trihalomethanes) (09/11/2007) (nob) 0 60 N/A 2 2 2 N/A .05 10 10 N/A .27 0 80 N/A 14 Typical Source of Contaminant Discharge of drilling wastes; Discharge from metal refineries; Erosion of natu ral denosits_ State of Minr~esota requires all municipal water systems to add fluoride to the drinking water to promote strong teeth; Erosion of natural deposits; Discharge from fertilizer and aluminum factories. By-product of drinking water disinfection. " Erosion of natural deposits; Discharge from refineries and factories; Runoff from landfills; Runoff(ram cronland. Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits. By-product of drinking water disinfection. ' Level Found Contaminant (units) Range Average/ (200R) Result* Radon (pCi/l) (11/03/2005) N/A 120 Typical Source of Contaminant Erosion of natural denosits. *This is the value used to determine compliance with federal standards. It sometimes is the highest value detected and sometimes is an average of all the detected values. If it is an average, it may contain sampling results from the previous year. Radon ~ a radioactive gas which is naturally occurring in some groundwater. It poses a lung cancer risk when gas is released from water into air (as ocurs during showering, bathing, or washing dishes or clothes) and a stomach cancer risk when it is ingested. Be- cause radon in indoor air poses a much greater health risk than radon in 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, home- owners, schools, and communities to reduce the radon threat from indoor air. For states without such a program, the Maximum Contaminant Level (MCL) of 300 pCi/1 may apply. Minnesota plans to adopt an Indoor Air Program once the Radon Rule is finalized. Contaminant MRDLG MRDL **** *****TypicalSource of (tmits/ Contaminant Chlorine 4 4 .i6 - .73 .47 Water additive used to control (ppm) microbes. ****Highest and Lowest MonthlyAverage. *****Highest QuartertyAverage. Contaminant 90% # sites over tunitsl MCLG AL Level AI, Copper (ppm) N/A 1.3 .55 0 out of 10 (08/14/2007) Lead (ppb) N/A 15 nd 0 out of 10 (08/!4/2007) Typical Source of Contaminant Corrosion of household plumbing systems; Erosion of natural denosits. Corrosion of household plumbing systems; Erosion of natural deposits. If present,' infants and children who drink water containing lead in excess of the action level could experience delays in their physical or mental development. Children could show slight defi- cits in attention span and learning abilities. Adults who drink this water over many years could de- velop kidney problems or high blood pressure. Lead in drinking water is primarily from materi- als and components associated with service lines and home plumbing. City of Kimball is respon- sible 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 wa- ter 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:H~vww.epa.gov/ safewater/lead. Some contaminants do not have Maximum Contaminant Levels established for them. These unregulated contaminants are assessed using state standards known as health risk limits to deter- mine if they pose a threat to human health. If unacceptable levels of an unregulated contaminant are found, the response is the same as if an MCL has been exceeded; the water system must inform its customers and take other corrective actions. In the table that follows are the unregulated con- taminants that were detected: l,ev~ I Fol]nd Contaminant (units) Range Average/ Typical Source of Contaminant Sodium (ppm) (2008/ Result N/A 6.5 Erosion of natural deposits. (11/21/2006) Sulfate (ppm) N/A 39.5 (11/2112006) Erosion of natural deposits. Compliance with National Primary Drinking Water Regulations 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, in some cas- es, radioactive material, and can pick up substances resulting from the presence of ani- mals or from human activity. Contaminants that may be present in source water inctude: Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife. Inorganic contamitzants, such as salts and metals, which can be naturally-occurring or result from urban storm water 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 agricul- ture, urban storm water runoff, and residential uses. Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, and septic systems. 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 l~rotection Agency (EPA) prescribes regulations which limit the amount of certain contaminants in water provided public water systems. Food and Drug Administration regulations estab- lish 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 a! least small amounts of some contaminants. The presence of contaminants does not nec- essarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency's Safe Drinking Water Hotline at (800) 426-4791. Some people may be more vulnerable to contaminants in drinking water than the gener- al population. Immuno-compromised persons such as persons with cancer undergoing che- motherapy, persons who have undergone organ transplants, people with HIVIAIDS or oth- er immune system disorders, some elderly, and infants can be particularly at risk from infec- tions. These people should seek advice about drinking water from their health care provid- ers. EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptospo- ridium are available from the Safe Drinking Water Hotline at (800) 426-4791. Published in the Tri- County News Thursday, May 21, 2009.