Yesterday, the U.S. Environmental Protection Agency (EPA) issued two actions addressing per- and polyfluoroalkyl substances (PFAS) in drinking water.  The measures focus on the long-lasting “forever chemicals” that can enter drinking water supplies and impact communities. 1.  Monitoring for data collection EPA is reproposing the Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) to collect new data on PFAS in drinking water. The proposed UCMR 5 would provide new data that is needed to improve the agency’s understanding of the frequency PFAS are found in the nation’s drinking water systems and at what levels. EPA will accept public comment on the proposed UCMR 5 for 60 days, following publication in the Federal Register. The agency also will hold a virtual stakeholder meeting twice during the public comment period. 2.  Adding two additional PFAS Chemicals EPA also is reissuing final regulatory determinations for perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) under the Safe Drinking Water Act.  The agency will make these two PFAS variants subject to the national primary drinking water regulation development process.  Their press release states that the development process for these two will help them determine the best way to add more new PFAS chemicals in the future. Cornerstone’s water regulation experts are available to answer any questions about how these regulations may impact your business.  Contact us at info@corner-enviro.com.  For more information, also visit www.epa.gov/safewater.