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COG Viewer - Long Island Sound Water Quality
Selected: September 16, 2025
Parameter: Chlorophyll a
Chlorophyll a (mg m⁻³)
0 10 20
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Space-based retrievals of water quality conditions in Long Island Sound complement ongoing, long-term, comprehensive in-situ water quality monitoring surveys conducted year-round by the Connecticut Department of Energy & Environmental Protection (CTDEEP). Data from the surveys are used to quantify and identify annual trends and differences in water quality parameters relevant to hypoxia (low dissolved oxygen), especially nutrients, temperature, and chlorophyll. These data are also used to evaluate the effectiveness of the management program to reduce nitrogen concentrations.
Water Quality and Hypoxia Newsletters published by CT-DEEP integrate satellite observations in their water quality and hypoxia assessments across Long Island Sound.

Water Quality Newsletters

Spring 2024 Newsletter June 2024 Newsletter July 2024 Newsletter August 2024 Newsletter September 2024 Newsletter

Hypoxia Summaries

June 2024 Hypoxia Summary July 2024 Hypoxia Summary August 2024 Hypoxia Summary

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CDOM
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Impacts of Hydrology and Extreme Events on Dissolved Organic Carbon Dynamics in a Heavily Urbanized Estuary.
Chl a
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Chlorophyll dynamics from Sentinel-3 for enhanced ecological monitoring in urban waters.
SPM
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Calibration of a multisensor algorithm for mapping suspended matter in turbid waters.
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