In 1986, California voters approved an initiative to address their growing concerns about exposure to certain chemicals or naturally occurring substances. That initiative became the Safe Drinking Water and Toxic Enforcement Act of 1986, better known by its original name of Proposition 65. Proposition 65 requires the State to publish a list of substances known to the State of California to cause cancer or birth defects or other reproductive harm. This list, which must be updated at least once a year, has grown to include approximately 800 chemicals, and naturally occurring substances since it was first published in 1987.
Proposition 65 also requires businesses to notify Californians about any of these substances being present in the products they purchase, in their homes or workplaces, or that are released into the environment, even if these are naturally occurring. By providing this information, Proposition 65 enables Californians to make informed decisions about protecting themselves from exposure to these chemicals or other substances.