For the first time, the federal government is on the cusp of regulating a class of deadly, so-called "forever chemicals" out of America's drinking water. The EPA's proposal applies to six of those chemicals, known as PFAS compounds, and would require water utilities to clean any detectable level out of their systems. Annie Snider from Politico joined Amna Nawaz to discuss the new limits. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders