Long Island Sound Partnership Nitrogen Reduction Infrastructure Grant
The Long Island Sound Partnership Nitrogen Reduction Infrastructure Grant funds science-based nitrogen reduction projects at Massachusetts wastewater treatment plants to improve water quality in the Long Island Sound.
Funder: Executive Office of Energy and Environmental Affairs
Due Dates: April 6, 2026 (Info Session) | June 17, 2026 (RFR Release, anticipated)
Funding Amounts: ~$7.2 million total available; no specified minimum/maximum per project; all work must be completed by September 30, 2031.
Summary: Supports Massachusetts wastewater treatment plants with pre-development and construction for nitrogen reduction projects in the Long Island Sound watershed.
Key Information: Eligibility limited to publicly owned treatment works (POTWs) discharging into the Long Island Sound watershed in Massachusetts.
Description
This grant program, administered by the Massachusetts Department of Environmental Protection (MassDEP) under the Executive Office of Energy and Environmental Affairs, provides funding to support the development and construction of nitrogen reduction solutions at Massachusetts wastewater treatment plants that discharge into the Long Island Sound watershed. The goal is to reduce nitrogen pollution in the Connecticut, Housatonic, and Thames River Watersheds, thereby improving water quality in the Long Island Sound. Projects can include planning, design, equipment purchases, and construction activities, with priority for initiatives that are shovel-ready or in the final stages of design and permitting. Funding is provided through the Infrastructure Investment and Jobs Act (IIJA) and the United States Environmental Protection Agency (USEPA), in partnership with the Long Island Sound Partnership.
