MCLs, DLRs, PHGs, for Regulated Drinking Water Contaminants

1 MCLs, DLRs, PHGs, for Regulated Drinking Water Contaminants (Units are in milligrams per liter (mg/L), unless otherwise noted.)Last Update: September 14, 2021 The following tables 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). For comparison, Federal MCLs and Maximum Contaminant Level Goals (MCLGs) (USEPA) are also displayed. Inorganic Chemicals Table, Chemicals with MCLs in 22 CCR 64431 State Regulated Inorganic Chemical ContaminantState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGA luminum (MFL = million fibers per liter; for fibers >10 microns long)7 MFL7 MFL20037 MFL7 , Total - OEHHA withdrew the Nov. Regulated Inorganic Chemical ContaminantState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGC hromium, Hexavalent - MCL & DLR repealed September (inorganic) (rev2005)* (as nitrogen, N)10 as as NO3 (=10 as N)20181010 Nitrite (as N) 1 as as N201811 Nitrate + Nitrite (as N)10 as N--10 as (rev2004) and Lead Table, 22 CCR referred to as MCLs for lead and copper are not actually MCLs; instead, they are called Action Levels under the lead and copper Regulated Copper and Lead ContaminantState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGC opper Table, Radionuclides with MCLs in 22 CCR 64441 and 64443[units are picocuries per liter (pCi/L), unless otherwise state.]

2 N/a = not applicable]State Regulated Radionuclides ContaminantState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGG ross alpha particle activity - OEHHA concluded in 2003 that a PHG was not practical 153nonen/a15zeroGross beta particle activity - OEHHA concluded in 2003 that a PHG was not practical4 mrem/yr4nonen/a4 + Radium-5------5zeroState Regulated Radionuclides ContaminantState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLG228 Strontium-90 "20,000""1,000"4002006----Uranium g/LzeroOrganic Chemicals Table, Chemicals with MCLs in 22 CCR 64444 Volatile Organic Chemicals (VOCs)State Regulated Volatile Organic ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGB enzene tetrachloride , (rev2009) ,4-Dichlorobenzene (p-DCB) ,1-Dichloroethane (1,1-DCA) ,2-Dichloroethane (1,2-DCA) (rev2005) Regulated Volatile Organic ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLG1,1-Dichloroethylene (1,1-DCE) , , (Methylene chloride) , , (rev2006) tertiary butyl ether ( mtbe ) ,1,2, (PCE) Regulated Volatile Organic ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal ,2, ,1,1-Trichloroethane (1,1,1-TCA) ,1,2-Trichloroethane (1,1,2-TCA) (TCE) (Freon 11) "1,1,2-Trichloro-1,2,2-Trifluoroethane (Freon 113)" (rev2011)----Vinyl chloride Synthetic Organic Chemicals (SOCs)State Regulated Non-Volatile Synthetic Organic ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGA lachlor Regulated Non-Volatile Synthetic Organic ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGA trazine (rev2009)----Benzo(a)pyrene (rev2006) (rev2009)

3 ,2-Dibromo-3-chloropropane (DBCP) ,4-Dichlorophenoxyacetic acid (2,4-D) (2-ethylhexyl)adipate (2-ethylhexyl)phthalate (DEHP) Regulated Non-Volatile Synthetic Organic ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLG(rev2010) dibromide (EDB) epoxide (rev2005) Regulated Non-Volatile Synthetic Organic ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGP entachlorophenol biphenyls (PCBs) ,2, ,3,7,8-TCDD (dioxin)3x10-85x10-95x10-1120103x10-8zer o2,4,5-TP (Silvex) Byproducts Table, Chemicals with MCLs in 22 CCR 64533 State Regulated Disinfection Byproducts ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGT otal Regulated Disinfection Byproducts ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal Acids (five) (HAA5) ** with PHGs established in response to DDW requests.

4 These are not currently Regulated Drinking Water Contaminants . State Regulated Disinfection Byproducts ContaminantsState MCLS tate DLRS tate PHGS tate Date of PHGF ederal MCLF ederal MCLGN-Nitrosodimethylamine (NDMA) *OEHHA's review of this chemical during the year indicated (rev20XX) resulted in no change in the PHG.**The DLR for Bromate is mg/L for analysis performed using EPA Method Revision , , or