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 visit our Proposition 65 Warnings website
The Safe Drinking Water and Toxic Enforcement Act
The current Proposition 65 list is dated December 29, 2023
Upcoming and past meetings, hearings and workshops
All Proposition 65 Notices
Links and downloads related to Proposition 65 statute and regulations
Visit this website to learn about warnings for exposures to chemicals on the Proposition 65 List
Learn how chemicals are added to the list
A Safe Use Determination (SUD) is a written statement issued by OEHHA, which interprets and applies Proposition 65 and its implementing regulations to a specific set of facts in response to a request by a business or a trade group
An Interpretive Guideline interprets Proposition 65 and its implementing regulations, as applied to specific facts
Letters about Proposition 65's application from OEHHA to interested parties.
Clear and reasonable warnings
Search the Proposition 65 Chemical Database
Proposition 65 No Significant Risk Levels (NSRLs) and Maximum Allowable Dose Levels (MADLs)
