Water

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  • Water Quantity

    Understanding Water Quantity in Connecticut is important for assessing, managing and planning to improve the balance of water use for the benefit of people and the environment.

  • 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.

  • Water Conservation

    Water Conservation information

  • Water Quality (305b) Report to Congress

    The DEEP Water Monitoring Group conducts annual water quality monitoring to evaluate the physical, chemical and biological condition of the State’s waters. Group staff collect a wide variety and large quantity of information each year, including water chemistry data, water temperature data, bacteria data, biological community data (fish, macroinvertebrates, diatoms) and tissue contaminant data.

  • Total Maximum Daily Load

    CT DEEP TMDL Water Quality Action Plans

  • Inland Wetlands and Watercourse Status and Trends

    Inland Wetlands and Watercourses Status and Trends

  • Water Diversion Registrations and Permits

    The Registration of water diversions occurred in 1982 and 1983. It was required by the Water Diversion Policy Act, in section 22a-368 of the Connecticut General Statutes.

  • Aquatic Life Impacts of Phosphorus Research

    The CT DEEP Monitoring Group is engaged in several efforts to study the effects of phosphorus in water bodies. This webpage provides information on the monitoring efforts, results and analysis conducted by the Monitoring Program. These efforts include recommendations by the Connecticut Academy of Science and Engineering report ‘Methods to Measure Phosphorus and Make Future Projections’ developed as part of Public Act 12-155, An Act Concerning Phosphorus Reductions in State Waters.

  • Fact Sheet for the Water Quality Standards and Classifications

    The Connecticut Water Quality Standards form the foundation of water quality programs in CT. This fact sheet provides a summary of water quality classification definitions and provides general information.

  • Water

    Water has shaped Connecticut’s landscape, eroding the land and leaving behind the varied topography that is Connecticut today. Adequate supplies of clean water are critical to support human societies as well as to maintain healthy ecological communities.

  • Connecticut Stream Flow Standards

    DEEP is implementing Stream Flow Standards and Regulations in response to PA 05-142.

  • Lakes and Ponds

  • MIW Training - Video 1

    Connecticut's Inland Wetlands and Watercourses Act video series

  • Citizens Guide - Inland Wetlands Regulation

    Citizen's Guide To Participating in the Municipal Regulation Of Inland Wetlands and Watercourses

  • MIW Training - Video 3

    Municipal Inland Wetlands Agency Training Video Series 3