Water Quality

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• Triennial Review of the Connecticut Water Quality Standards

  Topics under Consideration for Revision within the WQS Regulations 2025

• 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.

• Triennial Review Process for Water Quality Standards

  Explanation of the Triennial Review Process for the Connecticut Water Quality Standards.

• Water Quality Classification Maps

  Water Quality Classification Maps by Town.

• Water Quality Reclassification

  Information regarding a request to change the surface or ground water quality classification of a property or area

• 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.

• Proposed Water Quality Standards

  Proposed amendments to Connecticut’s Water Quality Standards 2009.

• 2013 Proposed Water Quality Standards Regulations

  Previous (2013) proposed changes to the Connecticut Water Quality Standards.

• Archive of Water Quality Standards Documents

  This archive contains copies of Water Quality Standards which were previously adopted in Connecticut.

• Clean Water Act Accomplishments

  A chronology of the Clean Water Act in Connecticut.

• 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.