Why is there a lead warning on beer faucets?

Draft beer faucets are oftentimes made of a brass body with a polished chrome-plated finish. Brass is an alloy made primarily of copper and zinc with trace amounts of lead.  

The “California Safe Drinking Water and Toxic Enforcement Act of 1986”  (more commonly referred to as ‘Proposition 65’) was enacted to ensure that customers be properly warned when a product contains a substance known to cause cancer or reproductive harm.  The law requires the State of California to publish and maintain (annually) a list of substances to be available to the general public.  The list contains a wide range of naturally occurring and synthetic chemicals that are known to cause cancer or birth defects or other reproductive harm.  Lead has been identified and added to that list.  

Additionally, the law requires that businesses properly notify residents of the State of California about the presence of these substances in the products they purchase, or that may be present in their homes, workplaces, or that otherwise may be released into the environment.

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Information about State of California Proposition 65