A new government study estimates that at least 45% of the nation's tap water could be contaminated with one or more forms of PFAS. Here's what to do if you're worried about what's in your faucet.

Over the past few years, water safety crises have cropped up in several cities, including Baltimore, Flint, Mich., Jackson, Miss., and Newark, N.J., where lead or bacteria have leached into tap ...

For reference: Only about 2.9 million people (~4.5 percent of those connected to public water supplies) in the U.S. receive municipal tap water with fluoride levels at or above 1.5 mL/L, according ...