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Page 2 <br />Inorganic Chemicals <br />California U.S. EPA <br />MCL MCL Effective <br />Date DLR PHG PHG <br />Date MCL MCL Effective <br />Date MCLG <br />Barium 1,000 1977 100 2,000 2003 2,000 <br />1,000 <br />1992-07-30 <br />1977-06-24 <br />2000 <br />Beryllium 4 1994-09-08 1 1 2003 4 1994-01-17 4 <br />Cadmium 5 <br />10 <br />1994-09-08 <br />1977 <br />1 0.04 2006 5 <br />10 <br />1992-07-30 <br />1977-06-24 <br />5 <br />Chromium, Hexavalent 10 2024-10-01 0.1 0.02 2011 ------ <br />Chromium, Total 50 1977 10 none2 --100 <br />50 <br />1992-07-30 <br />1997-06-24 <br />100 <br />Cyanide 150 <br />200 <br />2003-06-12 <br />1994-09-08 <br />100 150 1997 200 1994-01-17 200 <br />Fluoride 2,000 1998-04 100 1,000 1997 4,000 1987-10-02 4000 <br />Mercury (inorganic) 2 1977 1 1.2 1999 2 1977-06-24 2 <br />Nickel 100 1994-09-08 10 12 2001 --Remanded -- <br />Nitrate (as nitrogen, N)10,000 as <br />N <br />1977 400 10,000 <br />as N3 <br />2018 10,000 1977-06-24 10 <br />mg/L <br />Nitrite (as N) 1,000 as <br />N <br />1994-09-08 400 1,000 as <br />N <br />2018 1,000 1992-07-30 1 mg/L <br />Nitrate + Nitrite (as N)10,000 as <br />N <br />1994-09-08 --10,000 <br />as N <br />2018 10,000 1992-07-30 10,000 <br />Perchlorate 6 2007-10-18 1 1 2015 ------ <br />Selenium 50 <br />10 <br />1994-09-08 <br />1977 <br />5 30 2010 50 <br />10 <br />1992-07-30 <br />1977-06-24 <br />50 <br />Thallium 2 1994-09-08 1 0.1 1999 2 1994-01-17 0.5 <br />2 In November 2001, OEHHA withdrew the 0.0025 mg/L PHG adopted in 1999. <br />3 The PHG for nitrate can also be expressed as 45 mg/L as NO3. <br />9.B. - Page 18 of 27 <br />207