I know a little bit about the subject. (I worked at NU's environmental clinic when they were looking at SDWA violations, though I didn't work on that project.) Although tons of municipalities are out of compliance with regulations, the regulations are very conservative and the water can be out of spec without being something you need to "fear."
You edited your comment and removed the part about third world countries, which was probably smart, but your original point seemed to be that it's fine that millions of Americans are exposed to potentially harmful chemicals/compounds/substances because it's not as bad as third world countries. I don't know about you, but I don't want to drink water that doesn't meet regulatory standards but is maybe technically "safe". If that's the case, why even have standards/regulations at all? Just because you won't immediately die of dysentery doesn't mean there won't be long term negative effects.
