Water Quality

DEEP headquarters at 79 Elm Street in Hartford has partially re-opened to staff and members of the public as of Tuesday, February 3. The DEEP records room has re-opened. The DEEP Central Permit Processing Unit (CPPU) will be open to the public starting on Wednesday, Feb. 4. For updates, click here

Water Quality

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Connecticut Water Quality Action Plans
The Housatonic River and Polychlorinated Biphenyls
Connecticut Water Quality Standards 2011 Revisions
Integrated Water Planning Management 2

Phase 2 of Integrated Water Resource Management (formerly known as Integrated Water Resource Management).
Phosphorus Reduction Strategy for Inland Non-tidal Waters

Phosphorus Reduction Strategy for Inland Non-tidal Waters
Water Quality
Water Quality Planner ListServ
Phosphorus PA12-155 Coordinating Committee and Workgroup Proceedings
Water Quality Planning ListServ
2019 Triennial Review of the Connecticut Water Quality Standards
Triennial Review Archive
Presentations, Comments and Summaries from two PA 12-155 Public Meetings
Archive Previous IWQR Cycles
Triennial Review of the Connecticut Water Quality Standards

Topics under Consideration for Revision within the WQS Regulations 2025
Water Quality Classification Maps

Water Quality Classification Maps by Town.

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Connecticut Department of Energy & Environmental Protection

Water Quality