Lately, there's been a curiously increasing problem for people living in California. When they try to order certain products online, they're finding that some products aren't shipping to California, simply because of where they live. The cause boils down to legislation that dates back to a time before online retail, but is being more heavily enforced today.
It's called The Safe Drinking Water and Toxic Enforcement Act of 1986, or more succinctly put, California Proposition 65. Some confuse the law as a ban on products but that's not what it is at all. Simply put, it requires companies to list warnings on products that contain certain chemicals or substances that that state has determined to be cancer or birth defect-causing agents. It's been a contentious law, to say the least, and it's a long list, currently up to 22 pages. It's not that the these substances will cause these problems with certainty, especially not in the trace amounts that those products may contain, just they have the potential.