If you live in California you likely have an enormous amount of chloroform in your water (I tested my water, was horrified, and bought a whole-house water filter; apparently this is just generally true in the Bay Area, and I suspect SoCal as well since we pipe our water down there).
Yeah, I had a bit of a brain fart, the E in EPA made me think Europe, despite me actually knowing what it stands for. I luckily have nothing like that in my water.