The document discusses potential sources of lead contamination in drinking water and the health risks posed, using examples from Flint, Michigan, Washington D.C., and Sebring, Ohio where unsafe lead levels were found. It notes that hundreds of schools and daycares across the U.S. failed lead tests between 2012-2015, and that lead exposure can cause permanent developmental and behavioral issues in young children. The full risks and impacts of lead contamination are still emerging.