Proposition 65

Proposition 65, officially known as the Safe Drinking Water and Toxic Enforcement Act of 1986, was enacted as a ballot initiative in November 1986. The proposition protects the state's drinking water sources from being contaminated with chemicals known to cause cancer, birth defects or other reproductive harm, and requires businesses to inform Californians about exposures to such chemicals.

Proposition 65 requires the state to maintain and update a list of chemicals known to the state to cause cancer or reproductive toxicity.

Questions?

Questions about Proposition 65? Check our Frequently asked Questions page or contact the Proposition 65 office: (916) 445-6900 or email P65.Questions@oehha.ca.gov.

Reports, Notices, Documents

Oct 24, 1997: Chemicals Listed Effective October 24, 1997 as Known to the State to Cause Cancer: 2,4,5-Trimethylaniline and its strong acid salts, 5-Chloro-o-toluidine and its strong acid salts, and Quinoline and its strong acid salts
Chemicals listed effective October 24, 1997 as known to the State to cause cancer or reproductive toxicity by the State's Qualified Experts: 2,4,5-trimethylaniline and its strong acid salts, 5-chloro-o-toluidine and its strong acid salts, and quinoline and its strong acid salts.
Sep 25, 1997: Request for Information, Availability of Draft Data Summaries and Draft Priorities for Chemicals with Respect to Their Potential to Cause Cancer
Request for information and notice of availability of draft data summaries and draft priorities for chemicals with respect to their potential to cause cancer: acronycine, 2-aminofluorene, 2-amino-5-(5-nitro-2-furyl)-1,3,4-oxadiazole, 4-amino-2-nitrophenol, N-butyl-N-nitrosourea, bis(2-chloro-1-methylethyl)ether, 2,5-dimethoxy-4’-aminostilbene, estragole, N-ethyl-N-formylhydrazine, furfural, p-chloronitrobenzene, trichloroacetic acid, 2-biphenylamine (and strong acid salts), bromoethane, chlorthal-dimethyl, cyanazine, 2,4-dichlorophenoxyacetic acid and its salts and esters, dapsone, dimethyl hydrogen phosphite, malonaldehyde and its salts, b-thioguanine deoxyriboside, zearalenone, bis(tri-n-butyltin)oxide, dicofol, di(2-ethylhexyl)adipate, patulin pentachloronitrobenzene, piperonyl sulfoxide. [Postponed: salicylazosulfapyridine, C.I. solvent yellow 14 (Sudan 1)]
Sep 12, 1997: Availability of the Draft Data Summaries and Draft Priorities for Chemicals with Respect to Their Potential to Cause Birth Defects or Other Reproductive Harm
Notice of availability of the draft data summaries and draft priorities for chemicals with respect to their potential to cause birth defects or other reproductive harm. Request for information on: Chloroform, Manganese, Phenol, Progesterone, Carbamazepine, n-Hexane, Styrene, Xylenes, 1,1-Dichloroethylene, Folpet, Chromium (includes tri and hexavalent forms), Copper sulfate, Formamide, Methyl butyl ketone, Toxaphene, 1,2-Dichloropropane, Beryllium, Toluene-2,4-diisocyanate, Boric acid, Sodium tetraborate, Benzo-a-pyrene, Dichlorophenoxyacetic acid, 2,4 butyl ester, Endrin, Carbon dioxide (by inhalation)
Sep 12, 1997: Availability of Final Data Summaries and Priorities for Chemicals with Respect to Their Potential to Cause Birth Defects or Other Reproductive Harm
Notice of availability of final data summaries and priorities for chemicals with respect to their potential to cause birth defects or other reproductive harm via authoritative bodies and State's Qualified Experts mechanisms: Aldrin, 1,3-butadiene, Carbon tetrachloride, Chlordane, Ethylene dibromide, Formaldehyde, Heptachlor, Methylene chloride, 2,4,5-T butyl ester, Trichloroethylene, Vinyl chloride, Acrylamide, DDT, Carbamazepine, Progesterone
Aug 15, 1997: 16 Chemicals Listed Effective August 26, 1997 as Known to the State to Cause Cancer or Reproductive Toxicity
Chemicals listed effective August 26, 1997 as known to the State to cause cancer or reproductive toxicity by the Authoritative Bodies or "Formally Required" mechanisms: 16 Chemicals (1-Amino-2,4-dibromoanthraquinone, 3,7-Dinitrofluoranthene, 3,9-Dinitrofluoranthene, Nitrobenzene, Estropipate, Ganciclovir sodium, Amiodarone hydrochloride, Atenolol, Ethionamide, Goserelin acetate, Leuprolide acetate, Paclitaxel, Quazepam, Trimetrexate glucuronate, C.I. Direct Blue 15, C.I. Direct Blue 218).

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