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<br />4 '- .J I" <br /> <br /> .evd I <br /> r.' ound <br />:ontamimll1t MCUi MeL Typical Source or ContUln inant <br />unitsi Range Average <br /> (2006i IResult* <br />Mercury ., ., i:\/A ~1.02 ~rosion or natural deposits; Discharge <br />inorganic') (ppbi. rrom relineries and 11lclories; Runorr <br />07/17/2002) rrom landlills; RunoJl' Irom cropland. <br />t'\ it rate (as 10 10 .0,42-,45 0,45 RunoJl'lrom fertilizer use; Leaching <br />~itrogen) (ppm) Irom septic tanks, sewage; Erosion of <br /> natural deposits. <br />IrTIIM (Total ) 80 ,fA 3.3 By-product of drinking water <br />rihalomethanes i lisin fi:ction. <br />(ppb) {07/18f2005i <br /> <br />l'WSID: \()~1I11~6 <br /> <br />Contaminant {unitsi Ll.'vd Found <br /> Ran!.'.e {2006i A veraudResuh* Tvnical Source orContatninant <br />Radon (pCii1 i ':\/A 383 Erosion of natural deposits. <br />{10i19/2005i <br /> <br />*This is the value used to determine compliance with federal standards. II sometimes is the highest value <br />detected and sometimes is an average of all the detected values. I fit is an average, it may contain sampling <br />results 11"<)(11 the previous year. <br /> <br />Radon is a radioactive gas which is naturally occurring in some groundwater. II poses a lung cancer risk <br />when gas is rdeasl.'d Irom waleI' into air (as occurs during showering, bathing, or washing dishes or c10thesi <br />and a stomach cancer risk when it is ingested. Because radon in indoor air poses a much greater health risk <br />than radon in drinking water, an Alternative Maximum Contaminant Levd {AMCU or 4,000 picoCurics per <br />liter may apply in states tlmt have adopted an Indoor Air Program, which compds citizens, homl.'owners, <br />schools, and communities to reduce the radon threat Irom indoor air. For states without such a program, the <br />Maximum ContUlnimll1t Levd (MCU of 300 pCi/1 may apply. Minnesota plans to adopt an Ind(x)r Air <br />Program once the Radon Rule is Iinalized. <br /> <br />~ontam inant **** ***** Irypical Source or Contaminant <br />units) VlRDLG MRDL <br />:h lorine (ppm) 4 ,4-.7 59 Water additive used to control microbes. <br /> <br />****Ilighest and Lowest Monthly Avemge. <br />*****Ilighest Quarterly Average. <br /> <br />:ontaminant 90% #. sites Typical Source of Contaminant <br />unitsi MCLG AI. Level over AI. <br />:()pper (ppm) r\./A 1.3 .51 1 out 01'20 :orrosion or household plumbing systems; <br />06/15/2005') Erosion or natural <.Ic!}osits. <br /> <br />Page 301'4 <br /> <br />-- - ----------- - - ------ - - <br />