ATTACHMENT NO. 1 2019 PHG Triennial Report: Calendar Years 2019-2020-2021 1 MCLs, DLRs, and PHGs for Regulated Drinking Water Contaminants (Units are in milligrams per liter (mg/L), unless otherwise noted.) Last Update: September 14, 2021 This table includes: California's maximum contaminant levels (MCLs) Detection limits for purposes of reporting (DLRs) Public health goals (PHGs) from the Office of Environmental Health Hazard Assessment (OEHHA) Also, the PHG for NDMA (which is not yet regulated) is included at the bottom of this table. Regulated Contaminant MCL DLR PHG Date of PHG Chemicals with MCLs in 22 CCR §64431—Inorganic Chemicals Aluminum 1 0.05 0.6 2001 Antimony 0.006 0.006 0.001 2016 Arsenic 0.010 0.002 0.000004 2004 Asbestos (MFL = million fibers per liter; for fibers >10 microns long) 7 MFL 0.2 MFL 7 MFL 2003 Barium 1 0.1 2 2003 Beryllium 0.004 0.001 0.001 2003 Cadmium 0.005 0.001 0.00004 2006 Chromium, Total - OEHHA withdrew the 0.0025-mg/L PHG 0.05 0.01 withdrawn Nov. 2001 1999 Chromium, Hexavalent - 0.01-mg/L MCL & 0.001-mg/L DLR repealed September 2017 -- -- 0.00002 2011 Cyanide 0.15 0.1 0.15 1997 Fluoride 2 0.1 1 1997 Mercury (inorganic) 0.002 0.001 0.0012 1999 (rev2005)* Nickel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 nitrogen, N) 10 as N 0.4 45 as NO3 (=10 as N) 2018 Nitrite (as N) 1 as N 0.4 1 as N 2018 Nitrate + Nitrite (as N) 10 as N -- 10 as N 2018 Perchlorate 0.006 0.004 0.001 2015 Selenium 0.05 0.005 0.03 2010 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 Copper 1.3 0.05 0.3 2008 ATTACHMENT NO. 1 2019 PHG Triennial Report: Calendar Years 2019-2020-2021 2 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 practical 15 3 none n/a Gross beta particle activity - OEHHA concluded in 2003 that a PHG was not practical 4 mrem/yr 4 none n/a Radium-226 -- 1 0.05 2006 Radium-228 -- 1 0.019 2006 Radium-226 + Radium-228 5 -- -- -- Strontium-90 8 2 0.35 2006 Tritium 20,000 1,000 400 2006 Uranium 20 1 0.43 2001 Chemicals with MCLs in 22 CCR §64444—Organic Chemicals (a) Volatile Organic Chemicals (VOCs) Benzene 0.001 0.0005 0.00015 2001 Carbon tetrachloride 0.0005 0.0005 0.0001 2000 1,2-Dichlorobenzene 0.6 0.0005 0.6 1997 (rev2009) 1,4-Dichlorobenzene (p-DCB) 0.005 0.0005 0.006 1997 1,1-Dichloroethane (1,1-DCA) 0.005 0.0005 0.003 2003 1,2-Dichloroethane (1,2-DCA) 0.0005 0.0005 0.0004 1999 (rev2005) 1,1-Dichloroethylene (1,1-DCE) 0.006 0.0005 0.01 1999 cis-1,2-Dichloroethylene 0.006 0.0005 0.013 2018 trans-1,2-Dichloroethylene 0.01 0.0005 0.05 2018 Dichloromethane (Methylene chloride) 0.005 0.0005 0.004 2000 1,2-Dichloropropane 0.005 0.0005 0.0005 1999 1,3-Dichloropropene 0.0005 0.0005 0.0002 1999 (rev2006) Ethylbenzene 0.3 0.0005 0.3 1997 Methyl tertiary butyl ether (MTBE) 0.013 0.003 0.013 1999 Monochlorobenzene 0.07 0.0005 0.07 2014 Styrene 0.1 0.0005 0.0005 2010 1,1,2,2-Tetrachloroethane 0.001 0.0005 0.0001 2003 Tetrachloroethylene (PCE) 0.005 0.0005 0.00006 2001 Toluene 0.15 0.0005 0.15 1999 1,2,4-Trichlorobenzene 0.005 0.0005 0.005 1999 1,1,1-Trichloroethane (1,1,1-TCA) 0.2 0.0005 1 2006 1,1,2-Trichloroethane (1,1,2-TCA) 0.005 0.0005 0.0003 2006 Trichloroethylene (TCE) 0.005 0.0005 0.0017 2009 Trichlorofluoromethane (Freon 11) 0.15 0.005 1.3 2014 ATTACHMENT NO. 1 2019 PHG Triennial Report: Calendar Years 2019-2020-2021 3 1,1,2-Trichloro-1,2,2-Trifluoroethane (Freon 113) 1.2 0.01 4 1997 (rev2011) Vinyl chloride 0.0005 0.0005 0.00005 2000 Xylenes 1.75 0.0005 1.8 1997 (b) Non-Volatile Synthetic Organic Chemicals (SOCs) Alachlor 0.002 0.001 0.004 1997 Atrazine 0.001 0.0005 0.00015 1999 Bentazon 0.018 0.002 0.2 1999 (rev2009) Benzo(a)pyrene 0.0002 0.0001 0.000007 2010 Carbofuran 0.018 0.005 0.0007 2016 Chlordane 0.0001 0.0001 0.00003 1997 (rev2006) Dalapon 0.2 0.01 0.79 1997 (rev2009) 1,2-Dibromo-3-chloropropane (DBCP) 0.0002 0.00001 0.000003 2020 2,4-Dichlorophenoxyacetic acid (2,4-D) 0.07 0.01 0.02 2009 Di(2-ethylhexyl)adipate 0.4 0.005 0.2 2003 Di(2-ethylhexyl)phthalate (DEHP) 0.004 0.003 0.012 1997 Dinoseb 0.007 0.002 0.014 1997 (rev2010) Diquat 0.02 0.004 0.006 2016 Endothal 0.1 0.045 0.094 2014 Endrin 0.002 0.0001 0.0003 2016 Ethylene dibromide (EDB) 0.00005 0.00002 0.00001 2003 Glyphosate 0.7 0.025 0.9 2007 Heptachlor 0.00001 0.00001 0.000008 1999 Heptachlor epoxide 0.00001 0.00001 0.000006 1999 Hexachlorobenzene 0.001 0.0005 0.00003 2003 Hexachlorocyclopentadiene 0.05 0.001 0.002 2014 Lindane 0.0002 0.0002 0.000032 1999 (rev2005) Methoxychlor 0.03 0.01 0.00009 2010 Molinate 0.02 0.002 0.001 2008 Oxamyl 0.05 0.02 0.026 2009 Pentachlorophenol 0.001 0.0002 0.0003 2009 Picloram 0.5 0.001 0.166 2016 Polychlorinated biphenyls (PCBs) 0.0005 0.0005 0.00009 2007 Simazine 0.004 0.001 0.004 2001 Thiobencarb 0.07 0.001 0.042 2016 Toxaphene 0.003 0.001 0.00003 2003 1,2,3-Trichloropropane 0.000005 0.000005 0.0000007 2009 2,3,7,8-TCDD (dioxin) 3x10-8 5x10-9 5x10-11 2010 2,4,5-TP (Silvex) 0.05 0.001 0.003 2014 Chemicals with MCLs in 22 CCR §64533—Disinfection Byproducts Total Trihalomethanes 0.080 -- -- -- Bromodichloromethane -- 0.0010 0.00006 2020 ATTACHMENT NO. 1 2019 PHG Triennial Report: Calendar Years 2019-2020-2021
Bromoform -- 0.0010 0.0005 2020 Chloroform -- 0.0010 0.0004 2020 Dibromochloromethane -- 0.0010 0.0001 2020 Haloacetic Acids (five) (HAA5) 0.060 -- -- -- Monochloroacetic Acid -- 0.0020 -- -- Dichloroacetic Adic -- 0.0010 -- -- Trichloroacetic Acid -- 0.0010 -- -- Monobromoacetic Acid -- 0.0010 -- -- Dibromoacetic Acid -- 0.0010 -- -- Bromate 0.010 0.0050** 0.0001 2009 Chlorite 1.0 0.020 0.05 2009 Chemicals with PHGs established in response to DDW requests. These are not currently regulated drinking water contaminants. N-Nitrosodimethylamine (NDMA) -- -- 0.000003 2006 *OEHHA's review of this chemical during the year indicated (rev20XX) resulted in no change in the PHG. **The DLR for Bromate is 0.0010 mg/L for analysis performed using EPA Method 317.0 Revision 2.0, 321.8, or 326.0.