Proposition 65 is an initiative originally approved by CA voters to address their growing concerns about exposure to toxic chemicals. It became the Safe Drinking Water and Toxic Enforcement Act of 1986, better known by its original name of Proposition 65. Prop 65 requires the State of CA to publish a list of chemicals known to cause cancer or birth defects or other reproductive harm, etc. The chemicals include additives or ingredients in pesticides, common household products, food, drugs, dyes, or solvents. The program is administered by The Office of Environmental Health Hazard Assessment (OEHHA) which is part of the CA Environmental Protection Agency. Where required, warnings must be included with the product’s labeling.

Link: https://oehha.ca.gov/proposition-65