
Black and Hispanic communities in the United States are more often poor — and also more likely to have harmful levels of per- and polyfluoroalkyl substances (PFAS) in their drinking water, a new study reveals. Sources of PFAS pollution — including major manufacturers, airports, military bases, wastewater treatment plants and landfills — are disproportionately sited near watersheds that serve these poorer communities, Harvard researchers found. “Our work suggests that the sociodemographic groups that are often stressed by other factors — including marginalization, racism and poverty — are also more highly exposed to PFAS in drinking water,” said study co-author Jahred Liddie. He is a PhD student in population health sciences at Harvard T.H. Chan School of Public Health, in Boston. “Environmental justice is a major emphasis of the current administration, and this work shows it should be considered in the upcoming regulations for PFAS in drinking water,” Liddie said in a school news release. The U.S. Environmental Protection Agency (EPA) has proposed a first-ever national drinking water regulation for six PFAS, expected to be finalized by late 2023. That regulation would establish maximum contaminant levels of two PFAS compounds — PFOA and PFOS — at 4 parts per trillion (4 ng/L). It would also limit the other four. PFAS are widely used because they have stain-resistant and water-resistant properties. But they have extreme persistence in… read on > read on >