Yesterday, EPA proposed to regulate certain PFAS under the Safe Drinking Water Act. EPA proposed Maximum Contaminant Level Goals for PFOA and PFOS of zero. It proposed Maximum Contaminant Levels for PFOA and PFOS of 4.0 parts per trillion. 
EPA also proposed MCLGs and MCLs for PFNA, PFHxS, PFBS, and HFPO-DA (“GenX Chemicals”) based on a novel hazard index approach to these compounds as a group. … More