Chemical in Starbucks Really Causing Cancer?

This whole story is not just strange but also horribly confusing and even though I think I have it figured out, it doesn't make it any less scary.

A California judge ruled this week that Starbucks (and other businesses that sell a coffee bean) will have to include a warning that they contain cancer-causing ingredients, according to Business Insider.

When coffee is roasted, there is a byproduct called acrylamide released. Scientists in Sweden have found out that this byproduct is "possibly carcinogenic" by the International Agency for Research on Cancer, and is known to cause cancer.

The debate now is whether or not there's enough in the coffee to actually be harmful. Since that's still unknown, California Starbucks will have to post warnings on their labels for this potential cancer-causing product. My question, though, if it's a danger in California, why is it not a danger in New York? If something has enough potential to cause cancer that the California government has ruled cups in need of a warning, why don't we?