Over the past few months, Gov. Tom Wolf's administration, the Pennsylvania Department of Environmental Protection (DEP), and other governmental stakeholders, have made strides toward better understanding and addressing contamination of state waters with perfluoroalkyl and polyfluoroalkyl substances (PFAS). Specifically, recent sampling efforts of certain public water systems (PWSs) and surface waters have resulted in new information about the prevalence of PFAS in state waters and have informed DEP actions toward regulating certain PFAS compounds.