Flint, Michigan is not alone in its drinking water crisis. A USA TODAY Network investigation identified almost 2,000 water systems across the country that showed excessive levels of lead contamination over the past four years.

These systems reported lead levels that exceed Environmental Protection Agency standards. About 350 of the systems provide drinking water to schools or daycares, and, collectively, the systems supply water to 6 million people. The investigation also found that at least 180 of the systems did not notify consumers about the high levels of lead, which is a federal requirement.

Water systems across the country contain high levels of lead