https://www.scientificamerican.com/article/forever-chemicals-are-widespread-in-u-s-drinking-water/

Many Americans fill up a glass of water from their faucet without worrying whether it might be dangerous. But the crisis of lead-tainted water in Flint, Mich., showed that safe, potable tap water is not a given in this country. Now a study from the Environmental Working Group (EWG), a nonprofit advocacy organization, reveals a widespread problem: the drinking water of a majority of Americans likely contains “forever chemicals.” These compounds may take hundreds, or even thousands, of years to break down in the environment. They can also persist in the human body, potentially causing health problems.

A handful of states have set about trying to address these contaminants, which are scientifically known as perfluoroalkyl and polyfluoroalkyl substances (PFASs). But no federal limits have been set on the concentration of the chemicals in water, as they have for other pollutants such as benzene, uranium and arsenic. With a new presidential administration coming into office this week, experts say the federal government finally needs to remedy that oversight. “The PFAS pollution crisis is a public health emergency,” wrote Scott Faber, EWG’s senior vice president for government affairs, in a recent public statement.