The EPA is proposing to regulate 6 PFAS at the federal level–PFOA and PFOS as individual contaminants at 4 parts per trillion (ppt), and PFHXS, PFNA, PFBS, and HFPO-DA (commonly referred to as GenX Chemicals) together at a Hazardous Index of 1.0 (unitless).

Today, the EPA announced that they are finally taking action to list two of the thousands of PFAS chemicals as Hazardous Substances under CERCLA, clearing the way for them to be included in Superfund clean up standards.