EPA Finalizes Fifth Unregulated Contaminant Monitoring Rule, Focusing on PFAS
On December 20, 2021, the U.S. Environmental Protection Agency finalized the Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) to establish nationwide monitoring for 29 per- and polyfluoroalkyl substances (PFAS) and lithium in drinking water. Distilled to its essence, the new rule requires certain public water systems to collect data for 29 PFAS, as well as …