Long Island Sound Partnership Nitrogen Reduction Infrastructure Grant
Long Island Sound Partnership Nitrogen Reduction Infrastructure Grant supports Massachusetts municipalities' wastewater plant assessments and upgrades to reduce nitrogen entering Long Island Sound.
This grant was recently updated
MassDEP added a video link for the Long Island Sound Nitrogen Reduction Grant pre-application meeting held October 7, 2026.
Funder: Executive Office of Energy and Environmental Affairs
Due Dates: November 3, 2026, at 5:00 p.m. EST (Q&A and amendments) | December 21, 2026, at 5:00 p.m. (Application) | September 30, 2031 (Funded work completed)
Funding Amounts: Up to $7.2 million total; Track One: $500,000–$6.5 million per application; Track Two: $50,000–$250,000 per facility
Summary: Supports Massachusetts wastewater treatment plant assessments and upgrades that reduce nitrogen entering the Long Island Sound watershed.
Key Information: Open to eligible publicly owned treatment works and regional planning agencies acting on their behalf; collection systems and outfalls are ineligible.
Description
The Massachusetts Department of Environmental Protection (MassDEP), under the Executive Office of Energy and Environmental Affairs, administers this program with U.S. Environmental Protection Agency funding through the Infrastructure Investment and Jobs Act and Long Island Sound Partnership. It supports nitrogen-reduction work at Massachusetts wastewater treatment plants in the Connecticut, Housatonic, and Thames River watersheds.
The program funds facility assessments and optimization upgrades, including personnel, planning, design, equipment, installation, and construction. Its goal is to reduce nitrogen discharges into Long Island Sound while defraying treatment-plant upgrade costs for municipalities and sewer authorities. Priority goes to shovel-ready projects, including projects under construction, and those in advanced design and permitting. Projects located in or directly benefiting Disadvantaged Communities also receive preference.
