Proposition 65 is a California law passed by voter initiative in 1986. It is designed to provide public warnings about the risk of exposure to toxic chemicals and to eliminate toxins from drinking water sources. The law is formally titled "The Safe Drinking Water and Toxic Enforcement Act of 1986."
As a result of Proposition 65, California has some of the strongest environmental protections in the U.S. The law has helped in making California a model for other regions seeking to address environmental hazards. The law ensures that people are informed about exposure to chemicals known by the State of California to cause cancer, birth defects and/or other reproductive harm.