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 about Proposition 65? Check our Frequently asked Questions page or contact the Proposition 65 office: (916) 445-6900 or email

Reports, Notices, Documents

Aug 12, 2016: Notice of Availability of Hazard Identification Materials to Support Reconsideration of Listing: Chloroform and Announcement of a Meeting of the Developmental and Reproductive Toxicant Identification Committee
Public comments available.  Public review of a hazard identification document to support the reconsideration of chloroform as a chemical listed in 2009 under Proposition 65 as known to cause reproductive toxicity.  OEHHA is bringing chloroform to the DARTIC because the federal regulations that affect the basis for the listing have changed.