MassDEP has made the latest round of Stormwater MS4 Municipal Assistance Grants available for application. The program enables groups of Massachusetts municipalities to expand their efforts to meet requirements for the 2016 Small Municipal Separate Storm Sewer System (MS4) General Permits, and to reduce stormwater pollution through coordinated partnerships that emphasize resource sharing.

Pre-application meeting for interested applicants: September 10, 2025 (registration instructions on MassDEP’s website)

Application deadline: October 3, 2025

Eligible applicants: entities representing two or more municipalities that are subject to the 2016 Small MS4 General Permit, including municipalities, regional planning agencies, MA stormwater coalitions, and non-profit organizations
Awards: May range from $50,000 - $75,000 per application

More information on these grants can be found on MassDEP’s website: https://www.mass.gov/info-details/grants-financial-assistance-watersheds-water-quality#stormwater-ms4-municipal-assistance-grant-program