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MAXIMUM CONTAMINANT LEVELS AND REGULATORY DATES <br /> FOR DRINKING WATER. <br /> U.S. EPA VS CALIFORNIA <br /> SEPTEMBER 2007 <br /> Contaminant <br /> U.S. EPA California <br /> 11 MCL(mg/L) Date MGL (mg/L) Effective [late <br /> Ivor anics <br /> 0.05 to 2 1191 1 2125/89 <br /> Aluminum 0.2b 918!94 <br /> Antimony0,006 7/92 0.006 918194 <br /> 0,05 eff: 6124177 0.05 77 <br /> Arsenic 0.010 eff: 1123106 <br /> Asbestos 7 MFL' 1191 7 MFL` 918194 <br /> 1 eff: 6124/77 1 77 <br /> Barium 2 1191 <br /> Beryllium 0.004 7192 0.004 9!8194 <br /> 0.010 eff: 6124177 0.010112 <br /> Cadmium 0.005 1191 0.005 <br /> 0.05 eff: 6/24177 0.05 <br /> Chromium 01 1191 <br /> 1.3 6191 1 <br /> Copper 1.3" <br /> 0.2 7/92 0.2Cyanide 0154 4186 2 <br /> Fluoride 2b 4/86 <br /> 0.05e eff: 6/24177 0.050 77 <br /> Lead 0.015d 6191 0.015d 12/11/95 <br /> Mercury 0.002 eff: 6/24./77 0.002 77 <br /> Nickel Remanded 0.1 9/8/94 <br /> Nitrate as N 10 eff: 6/24/77 as NO3 45 77 <br /> Nitrite as N 1 1/91 1 918/94 <br /> Total Nitrate/Nitrite as N) 10 1191 10 918194 <br /> Perchlorate - - 0.006 10/18/07 <br /> 0.01 eff: 6124/77 0.01 77 <br /> Selenium 0.05-- 1/91 0.05 9/8/94 <br /> Thallium 0.002 7/92 0.002 918194 <br /> Radionuclides <br /> 30 uglL 1217/00 20 pCi1L 111189 <br /> Uranium 20 Ci/L 6111/06 <br /> 5 pCi/L eff: 6124177 5 pCi/L 77 <br /> Combined Radium -226+228 5 Ci1L 6/11106 <br /> Gross Alpha particle activity 15 pCilL eff: 6124177 15 pCi1L 77 <br /> excludingradon & uranium 15 Ci1L 6111!06 <br /> 4 millirem yr eff: 6/24/77 50 pCi1L 77 <br /> Gross Beta particle activity 4 millirem/yr 6111106 <br /> 8 pCi/L eff: 6124177 8 pCi/L 77 <br /> Strontium-90 now covered by 8 pCill- 6111106 <br /> Gross Beta <br /> 20,000 pCi/L eff: 6124/77 20,000 pCi1L 77 <br /> Tritium now covered by 20,000 pCi1Lf 6/11106 <br /> Gross Beta <br /> Federal and State MCLS—Updated 09120107 Page 1 rf 4 <br />