• Clean Waters and
    Healthy Watersheds

    Improve water quality by reducing contaminant and nutrient loads
    from the land and the waters impacting Long Island Sound.

    Photo: The Lieutenant River where it empties into the mouth of the Connecticut River. Credit: Jerry Monkman/Ecophotography

    Learn More

  • Thriving Habitats
    and Abundant Wildlife

    Restore and protect the Sound’s ecological
    balance in a healthy, productive, and
    resilient state to benefit both people
    and the natural environment.

    Photo: An American oystercatcher with her young at Crane Island in Mamaroneck Harbor. Credit: Nadia Valla

    Learn More

  • Sustainable and
    Resilient Communities

    Support vibrant, informed, and engaged
    communities that use, appreciate, and
    help protect Long Island Sound.

    Photo: Volunteer project at Sheffield Island, part of the Norwalk Islands. Credit: Robert Burg

    Learn More

  • Sound Science and
    Inclusive Management

    Manage Long Island Sound using sound science
    and cross-jurisdictional governance that is inclusive,
    adaptive, innovative, and accountable.

    Photo: Students from the laboratory of UMass/Dartmouth Prof. Mark Altabet deploy a rosette sampler in the Western Sound. Credit: Mark Altabet

    Learn More

Stewardship Atlas


Explore the 33 Stewardship Areas along the coast of  Long Island Sound.
View Atlas »

Reducing Nitrogen


EPA is proposing to aggressively reduce nitrogen, a nutrient that in excess leads to poor water quality.
View Strategy »

Photo of the Month

Mamaroneck Town Supervisor Nancy Seligson describes the new environmentally friendly Town Center parking lot.
View Multimedia Gallery »

Ecosystem Targets

View health status and trends for LISS ecosystem targets and supporting indicators.
Learn more »


stratford2Learn more about the grant program  helping to restore and protect Long Island Sound, including restoring wetlands at Stratford Point. See Long Island Sound Futures Fund.


News Room


NY Sea Grant/LISS Sponsors 2 Mentor Teacher Workshops in October - New York Sea Grant and the Long Island Sound Study are sponsoring two mentor teacher workshops on water pollution issues in October on Long Island. Continue Reading


Celebrate National Estuary Day in Oyster Bay - On Saturday, September 14, 2019 the Long Island Sound Study (LISS), in partnership with The WaterFront Center, will host the 2nd annual Estuary Day in Oyster Bay, NY to kick-off National Estuary Week. Continue Reading


LIS Mentor Teacher Program to Offer 2 Workshops in September - The Long Island Sound Mentor Teacher Program is holding workshops in Greenwich and Stamford in September. Continue Reading


35 Volunteers Help Kick Off Campaign with Beach Cleanup - They collected 100 pounds of of litter – everything from deflated Mylar balloons and monofilament fishing line to plastic bottles, Styrofoam cups, straws, cigarette butts and lots of bottle caps. Continue Reading


Third year of #DontTrashLISound campaign brings in new partners to expand outreach - Beach cleanups in New Haven and Stamford help kickoff LISS;s #DontTrashLISound social media campaign. Continue Reading

Citizens Advisory Committee (3rd Quarter) -

When: September 12, 2019 all-day


Continue Reading

Habitat Restoration and Stewardship Workgroup (3rd Quarter) -

When: September 18, 2019 all-day
Where: Coogan Farm Nature & Heritage Center, 162 Greenmanville Ave, Mystic, CT 06355, USA


Continue Reading

Management Committee 2019 (4th Quarter) -

When: October 23, 2019 – October 24, 2019 all-day
Where: Danford's Hotel, Port Jefferson, NY 11777, USA

Agenda to come

Continue Reading


Year in Review 2018 - The latest issue of Sound Update focuses on Long Island Sound Study’s Year in Review of 2018. Continue Reading


Sound Bytes Spring 2019 - Read the Spring 2019 issue of Sound Bytes. Download the Spring 2019 issue as a PDF here. Continue Reading


Sound Bytes Winter 2019 - Read the Winter 2019 issue of Sound Bytes. Download the Winter 2019 issue as a PDF here. Continue Reading


Sound Bytes Fall 2018 - Read the Fall 2018 issue of Sound Bytes. Download the Fall 2018 issue as a PDF here. Continue Reading


Sound Bytes Summer 2018 - Read the Summer 2018 issue of Sound Bytes. Download the Summer 2018 issue as a PDF here. Continue Reading

Latest Tweets

About the StudyAbout the Study

The Long Island Sound Study (LISS) is a cooperative effort involving researchers, regulators, user groups and other concerned organizations and individuals. These people are working together to protect and improve the health of the Sound. Learn more