LIS Monitoring

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• Hypoxia Maps - Summer 1992

• Hypoxia Maps - Summer 2010

• Hypoxia Maps - Summer 1996

• Hypoxia maps - Summer 2016

• Hypoxia maps - Summer 2017

• LIS Hypoxia and Nitrogen Reduction Efforts

• Hypoxia-Maps---Summer-2022

• Long Island Sound Water Quality Monitoring FAQs

  Answers to commonly asked questions about the Long Island Sound Water Quality Monitoring Program.

• Long Island Sound Water Quality and Hypoxia Monitoring Program Overview

  The CT DEEP Water Monitoring Program, on behalf of the Long Island Sound Study estuary program, performs an intensive year-round water quality monitoring program on Long Island Sound. The data collected are used to understand the current conditions and changes in the water quality of the Sound.

• Hypoxia Maps - Summer 2025