Long Island Sound Report Card

Using science to tell stories and inspire change

Download LIS Report Cards: 2020 – 20182016

The Long Island Sound Report Card tracks and publicizes the ecological health of Long Island Sound. Every other year, Save the Sound assembles water monitoring data and, using an assessment methodology designed for the Report Card, scores water quality in five regions of Long Island Sound. In 2020, we added 50 new grades for the bays on the margins of the Sound. We bring the results to elected officials, environmental agencies, and the general public as part of our ongoing work to catalyze improvements in ecosystem health and promote restoration projects and investments.

The latest Report Card was released on October 6, 2020. In addition to the biennial printed report, the SoundHealthExplorer website provides public access to all the data in the Report Cards, with tools to view trends over time and to take a deeper dive into each region and each water quality indicator.

Keeping Up the Momentum

The biggest overall problem impacting the health of Long Island Sound is high levels of nitrogen and other nutrients, which contribute to dead zones, algae blooms, and marsh damage. Progress has been made in reducing nitrogen, especially from wastewater treatment plants—but further reductions are needed! Learn more about our nitrogen effort.

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Connecticut Cleanups - The Connecticut Cleanup is part of the International Coastal Cleanup, which takes place each year within the months of September and October, and culminates this year on September 18. Find a cleanup near you!

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