The draft National Pollutant Discharge Elimination System (NPDES) general permit for New Hampshire’s medium wastewater treatment plants, which Region 1 released Nov. 13, requires covered facilities to conduct quarterly influent, effluent and sludge sampling for per- and polyfluoroalkyl substances (PFAS) and annual sampling of certain industrial users. “In EPA’s judgment, PFAS monitoring of influent, effluent and sludge is necessary to better understand the fate and transport of PFAS throughout the treatment process,” a fact sheet accompanying the permit says. “Additionally,...