Connecticut Department of Energy & Environmental Protection

DEEP headquarters at 79 Elm Street in Hartford is currently closed due to recent water damage impacting multiple areas of the building. We are working to remediate the situation and get the building back open to staff and the public as soon as possible. While the building is closed, Staff continue to work either remotely or in alternate locations. We continue to be able to receive documents via U.S. Mail or courier service, and our electronic file submittal protocols remain unchanged. For updates, please click here

Connecticut Greenhouse Gas Reduction Progress Reports

The state of Connecticut has set several climate-related goals. DEEP tracks progress toward meeting these goals and has published a number of reports on the progress made in reducing statewide greenhouse gas (GHG) emissions over specific years. Below are Connecticut's published reports, starting with the most recent report.

New Draft for Public Comment Connecticut's Climate Progress Report - Issued January 2026.
Download the Connecticut's Climate Progress Report here
Download the Notice of Opportunity for Public Comment here

New 1990-2023 Greenhouse Gas Emissions Inventory - Updated September 2025.
Download the 1990-2023 GHG Inventory Report here
Download the Supporting Data here

Greenhouse Gas Inventory Dashboard

To view in full screen, click the Full screen icon button at the bottom right of the dashboard. If it is not appearing, try zooming in or out of the webpage by pressing CTRL - or CTRL +.



Previous GHG Emissions Inventory Reports and Materials:
National Greenhouse Gas Report:
 
Content last updated September 2025