On December 10, 2025, the Region issued Administrative Compliance Orders to the Town of Stow, MA for violations of the 2016 General Permit for Stormwater Discharges from Small Municipal Separate Storm Sewer Systems in Massachusetts (2016 MS4 Permit). The Order cites their failure to develop or modify, as appropriate, a post-construction stormwater management ordinance within three (3) years of the effective date of the Permit (i.e., by July 1, 2022). The Order requires Stow to enact its regulatory mechanism on or before August 3, 2026. The town must then notify EPA that their ordinance or regulatory mechanism has become effective within 7 days of their effective dates and provide the Agency with copies. The Order will facilitate the reduction of pollutants found in the permittees? stormwater through the retention or treatment of stormwater after construction on new or redeveloped sites. The Region coordinated with the Massachusetts Department of Environmental Protection (MassDEP) on this matter.