EPN members Linda Birnbaum, former Director, National Institute of Environmental Health Sciences and former EPA scientist; Betsy Southerland, former Director, EPA Office of Science & Technology in the Office of Water; and Bob Sussman, former EPA Deputy Administrator and Senior Policy Counsel to the EPA Administrator, penned this op-ed urging EPA to use a class-based approach to regulate PFAS in order to more quickly address the growing risks of these chemicals to the American people.