Water

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• Guidelines for Soil Erosion and Sediment Control

• 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.

• LIS Hypoxia and Nitrogen Reduction Efforts

• State Owned Dams and Flood Control Systems

  DEEP Engineering Services for State Owned Dams

• Connecticut Lake Watch (Volunteer Lake Monitoring)

  Connecticut Lake Watch is a community-based science project of the DEEP Volunteer Water Monitoring Program. Volunteers are trained to monitor the water quality of local lakes and ponds across Connecticut.

• Water Quality Monitoring Program Overview

  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.

• Fish Tissue Contaminant Monitoring

  Monitoring of toxic contaminants in tissues of fish and invertebrates has been conducted by DEEP in partnership with the CT Department of Public Health (DPH) since the late 1970s. Efforts have historically included analysis of levels of mercury and polychlorinated biphenyls (PCBs). More recent work has sought to study new contaminants of emerging concern, such as per- and polyfluorinated alkyl substances (PFAS).

• 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.

• River and Stream Water Monitoring

  DEEP has monitored rivers and streams for water quality since the 1970s. Current annual monitoring efforts include the collection of water chemistry, water temperature, macroinvertebrate community, fish community, periphyton community, and indicator bacteria data from locations throughout the State. This data collected by the Monitoring Program are used to assess the health of individual waterbodies. In addition, the data are used to support a variety of other projects, including evaluation of trends in Connecticut’s water quality in the state, study of the potential impacts of climate change on our waterbodies, and supporting nutrient and temperature criteria development.

• Stormwater Quality Manual and Soil Erosion and Sediment Control Guidelines

• 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.

• Lakes and Ponds

• Surface Water Quality

• Stormwater and Water Quality

  Stormwater and its effects on water quality.

• National Flood Insurance Program (NFIP)

  Information about the National Flood Insurance Program