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					TABLES FOR REVIEW OF MCLs IN RESPONSE TO PHGs - March 1, 2009 Table 1. Contaminants with MCL and PHG (date of PHG) [81 contaminants] alachlor (1997) aluminum (2001) antimony (1997) arsenic (2004) asbestos (2003) atrazine (1999) barium (2003) bentazon (1999) benzene (2001) benzo(a)pyrene (1997) beryllium (2003) cadmium (2006) carbofuran (2000) carbon tetrachloride (2000) chlordane (1997) copper (2008) cyanide (1997) dalapon (1997) 1,2-dibromo-3-chloropropane (DBCP) (1999) 1,2-dichlorobenzene (1997) 1,4-dichlorobenzene (1997) 1,2-dichloroethane (1999) 2,4-D (1997) 1,1-dichloroethane (2003) 1,1-dichloroethylene (1999) cis -1,2-dichloroethylene (2006) trans -1,2-dichloroethylene (2006) dichloromethane (2000) 1,2-dichloropropane (1999) 1,3-dichloropropene (1999) dinoseb (1997) diethylhexyladipate (2003) diethylhexylphthallate (1997) diquat (2000) endothal (1997) endrin (1999) ethylbenzene (1997) ethylene dibromide (2003) fluoride (1997) heptachlor (1999) heptachlor epoxide (1999) hexachlorobenzene (2003) hexachlorocyclopentadiene (1999) glyphosate (2007) lead (1999) lindane (1999) mercury (1999) methoxychlor (1999) MTBE (1999)

molinate (2008) monochlorobenzene (2003) nickel (2001) nitrate as NO3 (1997) nitrite as N (1997) nitrate plus nitrite (1997) oxamyl (1997) pentachlorophenol (1997) picloram (1997) perchlorate (2004) polychlorinated biphenyls (2007) radium-226 (2006) radium-228 (2006) simazine (2001) strontium-90 (2006) 1,1,2,2-tetrachloroethane (2003) tetrachloroethylene (PCE) (2001) thallium (2004) thiobencarb (2000) toluene (1999) 1,2,4-trichlorobenzene (1999) 1,1,1-trichloroethane (1,1,1-TCA) (2006) 1,1,2-trichloroethane (1,1,2-TCA) (2006) trichloroethylene (TCE) (1999) trichlorofluoromethane (Freon 11) (1997) 1,1,2-trichloro-1,2,2-trifluoroethane (Freon 113) (1997) 2,4,5-TP (Silvex) (2003) toxaphene (2003) tritium (2006) uranium (2001) vinyl chloride (2000) xylenes (1997)

TABLES FOR REVIEW OF MCLs IN RESPONSE TO PHGs - March 1, 2009 Table 2. Contaminants with an MCL greater than the PHG (date of PHG) [37 contaminants]

NOTE: Chemicals with PHGs greater or equal to their MCLs were not considered for further review, since their MCLs provide t more protection to the drinking water consumer as their PHGs. For this step in the process, chemicals in Table 1 with an MCL PHG were considered to have an MCL equivalent to the PHG: i.e., diquat, 1,2-dichloroethane, dichloromethane, and heptachlo lead and copper were not considered further, since they do not have MCLs (they are covered by a different regulatory approach like "action levels" (22 CCR §64678) are 7.5 and 4.3 times their PHGs, respectively. Finally, aluminum and fluoride were not co further, since they may also be added in drinking water treatment to provide a public health benefit and are not necessarily alwa "contaminants." Their MCLs are 1.7 and 2 times their PHGs, respectively. arsenic (2004)* atrazine (1999) benzene (2001)* benzo(a)pyrene (1997)* beryllium (2003) cadmium (2006)* carbofuran (2000)* carbon tetrachloride (2000)* chlordane (1997)* DBCP (1999)* 1,1-dichloroethane (2003) 1,2-dichloropropane (1999) 1,3-dichloropropene (1999)* diethylhexyladipate (2003) endrin (1999)* EDB (2003)* heptachlor epoxide (1999)* hexachlorobenzene (2003)* lindane (1999)* mercury (1999) molinate (2008) nickel (2001) pentachlorophenol (1997) polychlorinated biphenyls (2007)* radium-226 (2006)* radium-228 (2006)* strontium-90 (2006)* 1,1,2,2-tetrachloroethane (2003)* PCE (2001)* thallium (2004)* 2,4,5-TP (Silvex) (2003)* toxaphene (2003)* 1,1,2-TCA (2006)* TCE (1999) tritium (2006)* uranium (2001)* vinyl chloride (2000)*

*Indicates PHG is below the detection limit for purposes of reporting (DLR). The DLR is the level at which CDPH is confident about the quantity of contaminant being reported by analytical laboratories.

ts]

eview, since their MCLs provide the same or hemicals in Table 1 with an MCL 1.3 times the , dichloromethane, and heptachlor. In addition, by a different regulatory approach). Their MCLuminum and fluoride were not considered nefit and are not necessarily always

TABLES FOR REVIEW OF MCLs IN RESPONSE TO PHGs - March 1, 2009 Table 3. Contaminants with MCLs greater than PHGs with reported detections (2005-2008) (20 arsenic (2004)* benzene (2001)* beryllium (2003) cadmium (2006)* carbon tetrachloride (2000)* DBCP (1999)* 1,1-dichloroethane (2003) 1,2-dichloropropane (1999)* 1,3-dichlopropene (2006) EDB (2003)* mercury (1999) nickel (2001) PCE (2001)* radium-226 (2006)* radium-228 (2006)* thallium (2004)* 1,1,2-TCA (2006)* TCE (1999)* uranium (2001)* vinyl chloride (2000)* *Indicates PHG is below the DLR

ns (2005-2008) (20


				
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