Nearly half of U.S. tap water turns up ‘forever chemicals’ — who’s most at risk?

At least 45% of the tap water in the U.S. is estimated to have at least one type of the “forever chemicals” that researchers have linked to cancer, low birth weight and thyroid disease, a new national study from the U.S. Geological Survey released this week shows.

The agency claims it’s the first comprehensive study of its kind to look at both unregulated private wells and government-monitored public water sources and can give consumers new information about the risks of perfluoroalkyl and polyfluoroalkyl substances, known…