"The problem of contaminated drinking water extends far beyond Flint, Mich.

A study found tens of millions of Americans could be exposed to unsafe drinking water in any given year, consuming a wide spectrum of contaminants, including fecal coliform, lead and arsenic.

In 2015, nearly 21 million people relied on community water systems that violated health-based quality standards, according to the study, published Monday in the Proceedings of the National Academy of Sciences. "

Doyle Rice reports for USA TODAY February 12, 2018. [2]