Awash in Worry: Tap Water in America

At the Democratic debate in Flint, Michigan last Sunday, presidential candidates Bernie Sanders and Hillary Clinton called for Michigan Governor Rick Snyder to resign over the lead contamination of Flint’s water supply. The water crisis in Flint is an extreme case. But it has people across the country, parents especially, worried about the safety of the tap water in their own communities. How well-founded are their concerns?