On March 14, 2023 the U.S. Environmental Protection Agency (EPA) announced the proposed National Primary Drinking Water Regulation for per- and polyfluoroalkyl substances (PFAS). These chemicals have been in use since the 1940s in a variety of industry and consumer products such as nonstick cookware, waterproof clothing and firefighting foam. EPA is accepting public comments for the proposed regulations and, based on those comments, will finalize the regulations. Water utilities, such as the Baltimore City Department of Public Works (DPW), will have 3 years to comply with the regulations.