It's perfectly safe to drink the water out of virtually any tap in America. If you do much traveling, you'll find this is very untrue of the rest of the world (not just India).
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.
