All Data Provided by EWG
Contra Costa County, California
Serves: 198,000
Data available: 2013-2019*
Source: Surface water
* 2013 testing is for chemicals in EPA’s Third Unregulated Contaminant Monitoring Rule (UCMR-3) only.
This Utility 5.67 ppb
EWG Health Guideline 0.06 ppb
No Legal Limit
Chemicals tested for but not detected from 2014 to 2019:
1,1,1-Trichloroethane , 1,1,2-Trichloroethane , 1,1-Dichloroethane , 1,1-Dichloroethylene , 1,2,3-Trichloropropane , 1,2,4-Trichlorobenzene , 1,2-Dibromo-3-chloropropane (DBCP) , 1,2-Dichloroethane , 1,2-Dichloropropane , 1,3-Butadiene , 1,4-Dioxane , 17-beta-Estradiol , 2,4,5-TP (Silvex) , 2,4-D , 2-methoxyethanol , 2-propen-1-ol , 4-Androstene-3,17-dione , Alachlor (Lasso) , Aldicarb , Aldicarb sulfone , Aldicarb sulfoxide , Alpha-hexachlorocyclohexane , Arsenic , Atrazine , Benzene , Benzo[a]pyrene , Beryllium , Bromate , Bromochloromethane , Bromoform , Bromomethane , Butylated hydroxyanisole , Cadmium , Carbofuran , Carbon tetrachloride , Chlordane , Chlorodifluoromethane , Chloromethane , Chlorpyriphos , cis-1,2-Dichloroethylene , Cobalt , Dalapon , Di(2-ethylhexyl) adipate , Dibromoacetic acid , Dichloromethane (methylene chloride) , Dimethipin , Dinoseb , Diquat , Endothall , Endrin , Equilin , Estriol , Estrone , Ethinyl estradiol , Ethoprop , Ethylene dibromide , Germanium , Heptachlor , Heptachlor epoxide , Hexachlorobenzene (HCB) , Lindane , Mercury (inorganic) , Methoxychlor , Monobromoacetic acid , Monochlorobenzene (chlorobenzene) , Nitrite , o-Dichlorobenzene , o-toluidine , Oxamyl (Vydate) , Oxyflurofen , p-Dichlorobenzene , Pentachlorophenol , Perfluorobutane sulfonate (PFBS) , Perfluoroheptanoic acid (PFHPA) , Perfluorohexane sulfonate (PFHXS) , Perfluorononanoic acid (PFNA) , Perfluorooctane sulfonate (PFOS) , Perfluorooctanoic acid (PFOA) , Permethrin , Polychlorinated biphenyls (PCBs) , Profenofos , Quinoline , Simazine , Styrene , Tebuconazole , Testosterone , Tetrachloroethylene (perchloroethylene) , Thallium , Toluene , Toxaphene , trans-1,2-Dichloroethylene , Tribufos , Trichloroethylene , Vinyl chloride
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From April 2019 to March 2021, Contra Costa Water District complied with health-based drinking water standards.
Information in this section on Contra Costa Water District comes from the U.S. EPA Enforcement and Compliance History Online database (ECHO).
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