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<br />, l II I <br /> <br />I'WSID: 1O~()()36 <br /> <br />requirement which a water system mustl()lIow. <br /> <br />90th Percentile Level---111is is the value obtained aileI' disregarding 10 percent or the samples taken that had <br />the highest levels. (For example. in a situation in which 10 smnples were taken. the 90th percentile k'vel is <br />determined by disregarding the highest resull, which represents 10 percent or the samples.) ~ote: In <br />situations in which only 5 samples arc taken, the average or the two with the highest levels is taken to <br />determine the 90th percentile level. <br /> <br />pCill---PicoCuries p\.'r liter (a measure orradioactivityo). <br /> <br />ppb---Parls per billion, which can also be expressed as micrograms per liter (ugin. <br /> <br />ppm---Parts per million, which can also be expr\.'ssed as milligrams per liter (mgiO. <br /> <br />~/A---~ot Applicable (docs not apply). <br /> <br /> Level Found <br />:ontamimmt MCUi MCL Irypical Source or Contaminant <br />units) Range A wrage <br /> (2006) IResull* <br />Alpha Emitters ) 15.4 .'\/A 1.2 Erosion or natural deposits. <br />pCiln <br />07/17/20020) <br />Barium (ppm) , , ':\/A 0.03 Discharge or drilling wastes; <br />07/17/2002) Discharge from metal relineries: <br /> Erosion or natural deposits. <br />:admium (ppbO) 5 5 ':\/A I.R5 :orrosion of gal\ooan ized pipes: <br />07/17/20020) Erosion or natural deposits: <br /> Discharge from metal relineries: <br /> RunolT rrom waste batteries and <br /> paints. <br />:ombined Radium 0 5.4 I':\/A ~l. 09 Erosion or natural deposits. <br />pCiln <br />07/17/2002) <br />Fluoride (ppm ) ..to ~.O ).93- 1.1 1.03 State or Minnesota r\.'(.juircs all <br /> nunicipal water systems to add <br /> Iluoride to the drinking water to <br /> )romote strong teeth: Erosion or <br /> natural dCJ)osits: Disclmrge rrom <br /> ICrlilizer and aluminum Illctorks. <br />Ilaloacetic ^cids k> 50 t\/^ 0.6 By-product or drinking water <br />11^^5) (DDb) disinl~'Ction. <br /> <br />Page 201'4 <br /> <br />~--~--------- -~- --- - ----- ~ -------'----<--- - ---- <br />