On March 2 and March 5, 2026, EPA Region 3 issued Unilateral Administrative Orders (UAOs) to 17 community water systems in Pennsylvania that failed to comply with the requirements of the Safe Drinking Water Act's ( SDWA ) Lead and Copper Rule Revisions ( LCRR ). Pursuant to 40 C.F.R. 141.84, community water systems ( CWS ) and non-transient non-community water systems ( NTNCWS ) were required to submit an initial service line inventory to the State by October 16, 2024. The EPA issued UAOs to those CWSs in Pennsylvania who failed to comply with these requirements. The EPA directly implements LCRR but has notified the Pennsylvania Department of Environmental Protection ( PADEP ) of the action against these facilities. This action aligns with the Administrator's Pillar #1 of the Powering the Great American Comeback : Clean Air, Land, and Water for Every American.