Water

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  • Water Quality Standards and Classification

    The Connecticut Water Quality Standards establish the water quality goals of Connecticut's waterbodies and form the foundation of Connecticut's water management programs.

  • Volunteer Water Monitoring Program Overview

    CT DEEP encourages groups and individuals interested in helping to conserve and protect our water resources to become volunteer water monitors. The Volunteer Water Monitoring Program utilizes a three-tiered approach to volunteer water quality monitoring, which is also increasingly referred to as 'citizen science' or 'community science'. The three-tiered approach allows for participation by volunteers having a wide range of skills and interest levels.

  • Hypoxia maps - Summer 2019

  • Hypoxia Maps - Summer 2008

  • Hypoxia Maps - Summer 2012

  • Hypoxia Maps - Summer 2000

  • Connecticut Water Quality Standards 2011 Revisions

  • 2019 CT Volunteer Water Monitoring Conference

    The 2019 Volunteer Water Monitoring Conference was held on April 5, 2019 at Three Rivers Community College in Norwich, CT. The conference was organized by the CT DEEP in collaboration with partners, and marked the 20 year anniversary of the DEEP Volunteer Water Monitoring Program. The event featured five concurrent oral presentation sessions and workshops as well as a student poster session. More than 100 volunteer water monitoring groups from across Connecticut were represented.

  • 2024_Draft_BacteriaTMDLs

  • 2014 Volunteer Water Monitoring Conference

    The 2014 Volunteer Water Monitoring Conference was held on July 25, 2014 at Goodwin College in East Hartford, CT. The conference was the first such conference to be organized by the CT DEEP to celebrate volunteer water monitoring in Connecticut. More than 100 individuals attended representing individual volunteers (citizen scientists), watershed group leaders, municipal commissioners, college and university professors, state and federal scientists, students, and representatives from the environmental consulting industry. In total more than 40 volunteer monitoring groups were represented at the conference!

  • Tips for Conserving Water

    Tips for Conserving Water

  • Ambient Benthic Macroinvertebrate Monitoring

    The DEEP Water Monitoring Group has used benthic macroinvertebrate communities to help characterize stream and river water quality since the mid-1970s. Benthic macroinvertebrates are animals without backbones, who inhabit the bottom of rivers and streams, as well as many other waterbody types. These organisms are very well studied and have a long history of use as indicators of water quality. Certain types, including mayflies, stoneflies, and caddisflies, can survive only in the cleanest water quality conditions. Other major groups of macroinvertebrates are true flies, beetles, worms, crustaceans, and dragonflies.

  • National Flood Insurance Program (NFIP)

    Information about the National Flood Insurance Program

  • Lake Water Quality Monitoring

    The DEEP Water Monitoring Program conducts ambient monitoring and the related assessment of the State’s waters, including Connecticut's many lakes and ponds. In Connecticut, there are a total of 2,267 lakes and ponds greater than 10 acres in size. The Monitoring Program conducts annual monitoring on approximately 10-20 of these. The type and locations of monitoring during a given year is determined by a variety of factors including participation in regional and national studies as well as support requests from groups within DEEP.

  • Proposed Water Quality Standards

    Proposed amendments to Connecticut’s Water Quality Standards 2009.