Water Quality
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Triennial Review Process for Water Quality Standards
Explanation of the Triennial Review Process for the Connecticut Water Quality Standards.
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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.
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Clean Water Act Accomplishments
A chronology of the Clean Water Act in Connecticut.
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Integrated Water Resource Management
Connecticut is using a new approach called Integrated Water Resource Management as the basis to address the existing goals of protecting and restoring Connecticut's waters.
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2019 Triennial Review of the Connecticut Water Quality Standards
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Integrated Water Planning Management 2
Phase 2 of Integrated Water Resource Management (formerly known as Integrated Water Resource Management).
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Triennial Review of the Connecticut Water Quality Standards
Topics under Consideration for Revision within the WQS Regulations 2025
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Water Quality Reclassification
Information regarding a request to change the surface or ground water quality classification of a property or area
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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.