Unknown to most Americans, a surprising number of U.S. cities have drinking water with unhealthy levels of chemicals and contaminants. In fact, some organizations and state environmental agencies that collect and analyze water data say the level of chemicals in some Americans' drinking water not only exceeds recommended health guideline but the pollutants even exceed the limits set by the U.S. Environmental Protection Agency (EPA), the national legal authority in these matters.

10 American Cities With the Worst Drinking Water - DailyFinance