Proposition 65 is a California law passed by direct voter initiative in 1986 by a 63%–37% vote. Its goals are to protect drinking water sources from toxic substances that cause cancer or birth defects and to reduce or eliminate exposures to those chemicals generally, such as in consumer products, by requiring warnings in advance of those exposures, with the intended goal being that companies choose to reformulate their products without the substances rather than simply providing notice of such substances in their product.
