Clean Waters and
Healthy Watersheds

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

Learn More

Photo Credit Button Icon

A woman kayaks in the Black Hall River near the mouth of the Connecticut River in Old Lyme, Connecticut. Credit: Jerry Monkman/Ecophotography

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.

Learn More

Photo Credit Button Icon

Harp seal resting on beach in Madison, CT, waving flipper to warm itself in winter.

Sustainable and
Resilient Communities

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

Learn More

Photo Credit Button Icon

The mouth of the Saugatuck River in Westport, CT.

Sound Science and
Inclusive Management

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

Learn More

Photo Credit Button Icon

UConn Professor Beth Lawrence collects data on surface water salinity with student Madeline Kollegger at a Barn Island tidal marsh. Photo by Emily Couture (CAHNR)/UConn.

The Long Island Sound Study is revising its Comprehensive Conservation and Management Plan.
Learn more about the plan here.

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

Newsroom

image for Flora on the Sound
image for Can Kelp Help Plants Grow?
image for Long Island Sound Records Third Smallest ‘Dead Zone’ Since Monitoring Began in 1987
image for Stormwater Management Guidance Manual for use in Multi-Unit Residential Areas
image for Long Island Sound Study Signs Agreement With U.S. Fish and Wildlife Service to Establish A Salt Marsh Monitoring Network
image for Long Island Sound Study Invites Input for Drafted Update of Conservation Plan
image for Draft CCMP Public Information Session Flyer
image for Register for Virtual CCMP Public Information Sessions
image for 2024 Work Plan
image for A New Approach to Beach Monitoring Could Improve Public Health in Connecticut
image for Habitat Restoration and Stewardship Work Group Meeting
image for Citizens Advisory Committee
image for Sound Matters Summer 2024 Issue
image for Year in Review 2023
image for Sound Matters Spring 2024 Issue
image for Sound Matters Winter 2024 Issue
image for Sound Matters Fall 2023 Issue
image for Sound Matters Spring 2023 Issue
image for Year in Review 2022
image for Sound Matters Winter 2023 Issue
image for Sound Matters Spring 2022 Issue
image for Year in Review 2021
image for Stuck Between a Rock and a Hard Place
image for Out on the water measuring the health of the Sound’s bays and harbors
image for Coastal Marsh Birds Live Life on the Edge, but Now Face Threat of Sea Level Rise
image for From Canoeing to Communications: A College Intern Tests the Waters in the Environmental Field
image for Recognizing Environmental Anniversaries and Accomplishments
image for A Chilly Day On the Sound
image for Remembering the Great Hurricane of 1938
Sound Spotlight

Multi-Year Pilot Study on Long Island Explores Use of Sugar Kelp as a Fertilizer Amendment

Researchers and agriculture specialists are setting out to determine if sugar kelp, farmed for bioextraction, can be used as a fertilizer amendment for use by agricultural growers

Learn More

Long Island Sound
By The Numbers

1,320
Square Miles

Area of the Long Island Sound

63
Feet

Average Depth

18 trillion
Gallons

Water Volume

600
Miles

Length of Coastline

23M+
People

Population Living Within 50 miles

$9.4B
Dollars (2015)

Estimated Value to the Local Economy Per Year

120+
Finfish

No. of Finfish Species Found in the Sound

Stay Connected

Sound Fact
Instagram
Videos
Featured Video thumbnail
Eelgrass Mapping and Monitoring

Our Partners

United States Environmental Protection Agency seal
Connecticut Energy Environment seal
Department of Environmental Conservation seal
NEIWPCC logo
Sea Grant CT logo
Sea Grant NY logo
MassDEP logo

Please complete your newsletter signup.


Subscribe to receive our e-newsletter, Sound Bytes by providing your email address. Interested in a free copy of our print newsletter, Sound Update? Then also provide your home/company/school address.