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2015 Water QuaLity TabLe <br /> Surface <br /> Primary Drinking Water Standards Groundwater Water <br /> Year MCL PHIS E�,,�sded <br /> Redi.1.9iFet Tested Unit RMCL) (MCLG) Standard? Range <br /> e Range Average Source of Substance <br /> Gross alpha partite 2007-2015 pCi/L 15 (g) No N0.12 5 4• NO NO Erosion of natural tleposits <br /> ac ty <br /> uranium 2007-2015 ACYL 20 0.43 No ND-105 37 NO NO Erosion of neutral deposits <br /> Year MCL RHO E..e.d.d <br /> clh.nri�a!S Tr�tcd Unit (SMCL) (MCLG) Standard' Range Average A,.,�,,) S..a. f S.b,tana. <br /> Aluminum 2013-2015 ppm 770.2) O6 No ND-0.07 001 0.1 Erosion of natural deposits;residue from some <br /> surface water treatment processes <br /> Arsenic' 2013-2015 ppb 10 0.004 No ND-6.9 3 ND Erosion of natural deposits;runaefrom <br /> orchard";glass and electronics production <br /> wastes <br /> Barium 2013-2015 ppm 1 2 No ND-0.3 01 0.04 Discharges of oil-drilling waste and from metal <br /> refineries;erosion of natural deposits <br /> Hexavalent chromium 2013-2015 ppb 10 0.02 No ND-7.01 1.2 NO Discharge from electroplating factories,leather <br /> tanneries,wood preservation,chemical <br /> synthesis,refractory production,and textile <br /> manufacturing facilities;erosion of natural <br /> deposits <br /> Chromium 2013-2015 ppb 50 (100) No ND-13.53 2.7 NO Discharge from steel and pulp mills and <br /> chrome plating;erosion of normal deposits <br /> 'Mile your drinking water meek Ne federal are state standards for arsenic,it does contain low levels of arsenic.The arsenic standards balance Ne waren understanding of arsenics passige health <br /> effects against the costs of removing arsenic from dunking water.The EPA continues to research the health seems of lav levels of arsenic,which is a mineral known 0 rause cancer in humans at high <br /> concentrations and is linked to odter health ehi such as skin damage and circulatory problems. <br /> 13 <br />