How did PFAS chemicals once used in popular stain-resistantcarpets end up in the water and environment in parts ofGeorgia, Alabama and South Carolina? FRONTLINE, TheAssociated Press, The Atlanta Journal-Constitution, The Postand Courier and AL.com investigate what happened with theseforever chemicals and the ongoing health impacts.The jointinvestigation draws on thousands of pages of documents andcourt depositions and interviews with former regulators andindustry insiders, as well as doctors, scientists and peoplewho have the kinds of illnesses that researchers have linked toPFAS contamination.