As for the air, it is generally clean in the US. Sort this chart by "above or below world average": [2] Also note the line about the US being very well sampled, so if there's an error it's not there.
It isn't 1965 anymore.
[1]: http://en.wikipedia.org/wiki/Drinking_water_quality_standard...
[2]: http://www.guardian.co.uk/environment/datablog/2011/sep/26/g...
Even in Europe water quality varies between "great" and "I wouldn't drink that" on a country-by-country basis, and sometimes on a city-by-city basis. Remember that "Europe" isn't a country and there aren't any such things as "European standards". Even to the extent that there is an European Union which sets standards for a portion of the subcontinent, enforcement and adherence varies widely. In Germany the tap water will be above American standards everywhere. In Italy, for instance, ask a local before drinking.
Maybe in some very out of the way spots - but I've been to Italy a lot for work and pleasure and I've never heard that advice before. Some times tap water tastes vary because of local geology or water source, but that applies everywhere.
> Remember that Europe isn't a country
Is America a country?
Safe may be, but on many occasions with a strong chlorine smell, something that stops me each time from drinking from such taps, even if they're perfectly safe.
In other words, Europe is the only other jurisdiction that even has actual standards, as opposed to "guidelines".
"Pollution" http://www.youtube.com/watch?v=9mvYec6AnCU