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10 <br />Drinking Water Report <br />Continued from Page 9 <br />Contaminant <br />(units) <br />Alpha Emitters <br />(pCi/l) <br />(11/05/2002) <br />Arsenic (ppb) <br />Barium (ppm) <br />Combined <br />Radium (pCi /l) <br />(11/05/2002) <br />Fluoride (ppm) <br />Haloacetic Acids <br />(HAAS) (ppb) <br />(07/14/2003) <br />TTHM (Total <br />trihalomethanes) <br />(ppb)(07/ 14/2003; <br />MCLG <br />0 <br />0 <br />2 <br />0 <br />4 <br />0 <br />0 <br />MCL <br />15.4 <br />50 <br />2 <br />5.4 <br />4 <br />60.0 <br />80 <br />Level Found <br />Range <br />(2002) <br />N/A <br />nd- <br />1.11 <br />nd- <br />.063 <br />N/A <br />0.78 -1 <br />N/A <br />N/A <br />Average <br />/Result* <br />2.1 <br />.06 <br />0.28 <br />1 <br />4.4 <br />9.3 <br />Typical Source of <br />Contaminant <br />Erosion of natural <br />deposits <br />Erosion of natural deposits; <br />Runoff from orchards; Runoff <br />from glass and electronic pro- <br />duction wastes. <br />Discharge of drilling wastes; <br />Discharge from metal refineries; <br />Erosion of natural deposits. <br />Erosion of natural deposits. <br />State of Minnesota requires all <br />municipal water systems to <br />add fluoride to the drinking <br />water to promote strong teeth; <br />Erosion of natural deposits; <br />Discharge from fertilizer and <br />aluminum factories. <br />By- product of drinking water <br />disinfection. <br />By- product of drinking water <br />disinfection. <br />Contaminant <br />(units) <br />Radon (pCi /l) <br />(04 -16 -2003) <br />Level Found <br />Range <br />(2004) <br />N/A <br />Average/ <br />Results* <br />276 <br />Typical Source of Contaminant <br />Erosion of natural deposits. <br />* This is the value used to determine compliance with federal standards. It sometimes is the highest value detected and <br />sometimes is an average of all the detected values. If it is an average, it may contain sampling results from the previous <br />year. <br />Radon is a radioactive gas which is naturally occurring in some groundwater. It poses a lung cancer risk when gas <br />15 released from water into air (as occurs during showering, bathing, or washing dishes or clothes) and a stomach cancer <br />risk when it is ingested. Because radon in indoor air poses a much greater health risk than radon in drinking water, an <br />Alternative Maximum Contaminant Level (AMCL) of 4,000 picoCuries per liter may apply in states that have adopted an <br />Indoor Air Program, which compels citizens, homeowners, schools, and communities to reduce the radon threat from <br />indoor air. For states without such a program, the Maximum Contaminant Level (MCL) of 300 pCi /1 may apply. Minnesota <br />plans to adopt an Indoor Air Program once the Radon Rule is finalized. <br />Contaminant <br />(units) <br />Copper (ppm) <br />MRDLG <br />4 <br />MRDL <br />4 <br />* * ** <br />.2 -.9 <br />* * * ** <br />.5 <br />Typical Source of Contaminant <br />Water additive used to control <br />microbes.. <br />****Highest and Lowest Monthly Average. <br />*****Highest Quartly Average <br />Continued on Page 11 <br />When all is said and done, more is said than done. — Anonymous <br />