Water
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2019 Triennial Review of the Connecticut Water Quality Standards
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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).
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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.
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The CT DEEP Water Monitoring and Assessment Unit conducts weekly bathing water sampling at 22 state-owned and managed swimming areas.
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Bantam Lake Watershed Projects
Strategies for controlling nutrient inputs to reduce harmful algal blooms and cyanobacteria
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LIS Quality Assurance Project Plans
Long Island Sound Quality Assurance Project Plans (QAPPs)
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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.
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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.
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PFAS Surface Water and Fish Tissue Monitoring
Information on DEEP efforts to monitor PFAS in surface waters and fish tissue.