Proposition 65 (officially: The Safe Drinking Water and Toxic Enforcement Act of 1986) is a California law whose goals are to protect drinking water sources from toxic substances and to reduce or eliminate exposures to those chemicals generally by requiring warning in advance of those exposures.

It is administered by Cal/EPA's California Office of Environmental Health Hazard Assessment (OEHHA) and it regulates listed substances in two ways: prohibiting businesses from knowingly discharging those substances into drinking water sources or into land where they can filter into drinking water sources.

All products sold in California must have labels that warn the consumer if they contain chemicals listed in Proposition 65 and the amount of exposure caused by the product is not within defined safety limits.

Proposition 65 Statement Walvoil.pdf