75C - PH - RPT ON WATER QUALITY RELATIVE TO PUBLIC HEALTH GOALS

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MCLs, DLRs and PHGs for Regulated Drinking Water Contaminants Last Update: December 31, 2009 The following table includes: CDPH's maximum contaminant levels (MCLs) CDPH's detection limits for purposes of reporting (DLRs) Public health goals (PHGs) from the Office of Environmental Health Hazard Assessment (OEHHA) (Units are in milligrams per liter (mg/L), unless otherwise noted.) State DLR PHG or Date of MCL MCLG PHG Chemicals with MCLs in 22 CCR §64431-Inorganic Chemicals Aluminum 1 0.05 0.6 2001 Antimony 0.006 0.006 0.02a 1997 Arsenic 0.010 0.002 0.000004 2004 Asbestos (MFL =million fibers per liter; for 7 MFL 0.2 MFL 7 MFL 2003 fibers >10 microns Ion Barium 1 0.1 2 2003 Be Ilium 0.004 0.001 0.001 2003 Cadmium 0.005 0.001 0.00004 2006 Chromium, Total - OEHHA withdrew the 0.05 0.01 (0.1) 1999 0.0025-m /L PHG in 2001 Chromium-6 -MCL to be established - current/y regulated under the total chromium 0.001 0.00006 b MCL C snide 0.15 0.1 0.15 1997 Fluoride 2 0.1 1 1997 Mercury (inorganic) 0.002 0.001 0.0012 1999 rev2005 " Nickel 0.1 0.01 0.012 2001 Nitrate as NO3 45 2 45 1997 Nitrite as N 1 as N 0.4 1 as N 1997 Nitrate + Nitrite 10 as N 10 as N 1997 Perchlorate 0.006 0.004 0.006 2004 Selenium 0.05 0.005 0.05 Thallium 0.002 0.001 0.0001 1999 rev2004 Copper and Lead, 22 CCR 64672.3 Values referred to as MCLs for lead and copper are not actually MCLs; instead, they are called 'Action Levels" under the lead and copper rule Co r 1.3 0.05 0.3 2008 Lead 0.015 0.005 0.0002 2009 Radionuclides with MCLs in 22 CCR §64441 and §64443-Radioactivity [units are picocuries per liter (pCi/L), unless otherwise stated; n/a =not applicable] Gross alpha particle activity - OEHHA concluded in 2003 that a PHG was not 15 3 (zero) n/a ractical E~9