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 law 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 the list of chemicals subject to the law’s requirements.

Questions about Proposition 65? Visit our Proposition 65 Warnings website.

Proposition 65 Resources

About Proposition 65

The Safe Drinking Water and Toxic Enforcement Act

The Proposition 65 List

The current Proposition 65 list is dated January 03, 2025

Meetings, Hearings and Workshops

Upcoming and past meetings, hearings and workshops

Notices

All Proposition 65 Notices

Laws and Regulations

Links and downloads related to Proposition 65 statute and regulations

Warnings

Visit this website to learn about warnings for exposures to chemicals on the Proposition 65 List

How chemicals are added to the Proposition 65 list

Learn how chemicals are added to the list

Safe Use Determinations

A Safe Use Determination (SUD) is a written statement issued by OEHHA, interpreting and applying Proposition 65 regulations to specific facts in response to a request by a business or trade group

Interpretive Guidelines for Proposition 65

An Interpretive Guideline interprets Proposition 65 regulations as applied to specific facts

Information Letters

Letters about Proposition 65's application from OEHHA to interested parties

Warning Regulations

Clear and reasonable warnings

Searchable Proposition 65 Chemical Database

Search the Proposition 65 Chemical Database

Safe harbor levels

Proposition 65 No Significant Risk Levels (NSRLs) and Maximum Allowable Dose Levels (MADLs)

Reports, Notices, Documents

November 2, 2007: Public Workshop: Request for Public Participation in a Proposition 65 Regulatory Update Project

As part of an ongoing project to clarify and update these regulatory provisions, OEHHA has established a limited-term position for a regulatory attorney. OEHHA is seeking input from stakeholders in the enforcement and business communities, as well as other members of the public concerning the direction this effort should take.

October 31, 2007: Extension of Public Comment Period on Eight Chemicals Submitted to the Developmental and Reproductive Toxicant Identification Committee for Consultation

Extension of public comment period on eight chemicals submitted to the Developmental and Reproductive Toxicant Identification Committee for consultation.

October 19, 2007: Request for Public Participation in a Proposition 65 Regulatory Update Project

Request for public participation on updates that could be taken to clarify existing regulatory provisions, add new provisions dealing with emerging issues, or delete provisions that may no longer be necessary.

September 28, 2007: Chemical Listed Effective September 28, 2007 as Known to the State of California to Cause Cancer: Anthraquinone (CAS No. 84-65-1)

Chemical listed effective September 28, 2007 as known to the State to cause cancer via the Authoritative Bodies mechanism: anthraquinone.

September 27, 2007: Notice of Adoption to Text of Regulations Title 22, Amendment to Section 12805 Maximum Allowable Dose Levels (MADLs) for Ethylene Glycol Monoethyl Ether (EGEE), Ethylene Glycol Monoethyl Ether Acetate (EGEEA), and Potassium Dimethyldithiocarbamate

Notice of Adoption of Maximum Allowable Dose Levels (MADLs) for ethylene glycol monoethyl ether (EGEE), ethylene glycol monoethyl ether acetate (EGEEA), and potassium dimethyldithiocarbamate.