Climate Change
Addressing climate change presents residents, businesses, nonprofits, and municipalities a chance to create, evolve, and maintain a sustainable environment, a robust economy, and a higher quality of life today and tomorrow.
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Long Island Sound is Connecticut’s largest and most important natural resource.
General Pretreatment Permit for Non-SIU User -11/12/25
Notice of General Permit Reissuance for the General Pretreatment Permit for Non-Significant Industrial User Discharges to Publicly Owned Treatment Works.
General Pretreatment Permit for SIU, Dewatering and Remediation Discharges-11/12/2025
Notice of General Permit Reissuance for the General Pretreatment Permit for Significant Industrial User, Dewatering, and Remediation Discharges.
Riffle Bioassessment by Volunteers (RBV) Program
The Riffle Bioassessment by Volunteers program (RBV) is a statewide volunteer water quality monitoring program coordinated by the CT DEEP Bureau of Water Protection & Land Reuse. Each fall RBV volunteers participate in a ‘treasure hunt’ to find Connecticut’s healthiest streams. To accomplish this, RBV volunteers are trained to collect ‘macroinvertebrates,’ or ‘river bugs' from their local rivers and streams. Depending on the types of macroinvertebrates that volunteers find in a stream, the CT DEEP can assess it as a healthy stream.
The Municipal Primer – Your Guide to Creating a “Green and Growing” Community (also called “The Municipal Primer”) provides basic information and guidance to municipal officials on a wide variety of topics related to environmental protection so that local decision-makers are informed about key environmental topics.
Conservation Action Tracker and Opportunity Areas
Learn about Connecticut's Wildlife Conservation Action Tracker and Conservation Opportunity Areas
Connecticut's Energy Efficiency Initiatives