Environmentalists Scrutinizing Less-Stringent PFBS Water Health Advisory

Environmentalists are scrutinizing EPA’s new health advisory level (HAL) for drinking water for the per- and polyfluoroalkyl substance (PFAS) known as perfluorobutane sulfonic acid (PFBS) after the agency set a much less stringent level for the chemical than other health advisories and some states’ levels. While EPA set stringent, interim HALs for the two most studied PFAS -- perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) -- at near-zero levels, and set a final HAL for the GenX cluster of chemicals...