Proposition 65, known as the Safe Drinking Water and Toxic Enforcement Act of 1986, was enacted as a ballot initiative in November 1986. The proposition protects California'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.
On December 2, 2020, the Office of Administrative Law approved the amendment of Title 27, California Code of Regulations, section 25705. In this amendment, a proposition 65 No Significant Risk Level (NSRL) of 23 micrograms per day for the chemical p-chloro-α,α,α-trifluorotoluene (PCBTF) (CAS 98-56-6) was adopted. The regulation will be effective on April 1, 2021.