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MCLs, DLRs and PHGs for Regulated Drinking Water Contaminants <br />Last Update: December 31, 2009 <br />The following table includes: <br />CDPH's maximum contaminant levels (MCLs) <br />CDPH's detection limits for purposes of reporting (DLRs) <br />Public health goals (PHGs) from the Office of Environmental Health Hazard Assessment <br />(OEHHA) <br />(Units are in milligrams per liter (mg /L), unless otherwise noted.) <br />75A -12 <br />State <br />MCL <br />DLR <br />PHG or <br />MCLG <br />Date of <br />PHG <br />Chemicals with MCLs in 22 CCR §64431— Inorganic Chemicals <br />Aluminum <br />1 <br />0.05 <br />0.6 <br />2001 <br />Antimony <br />0.006 <br />0.006 <br />0.02a <br />1997 <br />Arsenic <br />0.010 <br />0.002 <br />0.000004 <br />2004 <br />Asbestos (MFL = million fibers per liter; for <br />fibers >10 microns Ion <br />7 MFL <br />0.2 MFL <br />7 MFL <br />2003 <br />Barium <br />1 <br />0.1 <br />2 <br />2003 <br />Beryllium <br />0.004 <br />0.001 <br />0.001 <br />2003 <br />Cadmium <br />0.005 <br />0.001 <br />0.00004 <br />2006 <br />Chromium, Total - OEHHA withdrew the <br />0.0025 -m /L PHG in 2001 <br />0.05 <br />0.01 <br />(0.1) <br />1999 <br />Chromium -6 - MCL to be established - <br />currently regulated under the total chromium <br />MCL <br />-- <br />0.001 <br />0.00006b <br />Cyanide <br />0.15 <br />0.1 <br />0.15 <br />1997 <br />Fluoride <br />2 <br />0.1 <br />1 <br />1997 <br />Mercury (inorganic) <br />0.002 <br />0.001 <br />0.0012 <br />1999 <br />rev2005 " <br />Nickel <br />0.1 <br />0.01 <br />0.012 <br />2001 <br />Nitrate as NO3 <br />45 <br />2 <br />45 <br />1997 <br />Nitrite as N <br />1 as N <br />0.4 <br />1 as N <br />1997 <br />Nitrate + Nitrite <br />10 as N <br />-- <br />10 as N <br />1997 <br />Perchlorate <br />0.006 <br />0.004 <br />0.006 <br />2004 <br />Selenium <br />0.05 <br />0.005 <br />(0.05) <br />-- <br />Thallium <br />0.002 <br />0.001 <br />0.0001 <br />1999 <br />rev2004 <br />Copper and Lead, 22 CCR 64672.3 <br />Values referred to as MCLs for lead and copper are not actually MCLs; instead, they are <br />called 'Action Levels" under the lead and copper rule <br />Copper <br />1 1.3 <br />1 0.05 <br />1 0.3 <br />1 2008 <br />Lead <br />1 0.015 <br />1 0.005 <br />1 0.0002 <br />1 2009 <br />Radionuclides with MCLs in 22 CCR §64441 and §64443— Radioactivity <br />[units are picocuries per liter (pCi /L), unless otherwise stated; n/a = not applicable] <br />Gross alpha particle activity - OEHHA <br />concluded in 2003 that a PHG was not <br />practical <br />15 <br />3 <br />(zero) <br />n/a <br />75A -12 <br />