As communities across the country continue to discover contamination from per-and polyfluoroalkyl substances (PFAS), the National PFAS Contamination Coalition criticized guidance released by the Agency for Toxic Substances and Disease Registry (ATSDR) for medical clinicians on PFAS exposure.

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).