answer:I believe it has to do with Proposition 65, SAFE DRINKING WATER AND TOXIC ENFORCEMENT ACT OF 1986 You often see labeling that is required by the act on products that reads something like: WARNING: This product contains chemicals, including lead, known to the State of California to cause [cancer, and] birth defects or other reproductive harm. My mom and I used to joke about it all the time. Well, what does California know that my state doesn’t know? What’s my state not telling us? :-)