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
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Previous GHG Emissions Inventory Reports and Materials:
- CT GHG Emissions Inventory 1990-2021 with preliminary look at 2022 (updated June 18, 2024)
- CT GHG Emissions Inventory 1990-2021 and supporting data (released 2023)
- Proposed Methodology for Electricity-Sector GHG Accounting: Presentation | Video (October 26, 2021)
- CT GHG Emissions Inventory 2018 and supporting data (released 2021)
- CT GHG Emissions Inventory 2017 and supporting data (released 2020)
- CT GHG Emissions Inventory 2016 and supporting data (released 2018)
- CT GHG Emissions Inventory 2015 (released 2018)
- CT GHG Emissions Inventory 2014 (released 2017)
- CT GHG Emissions Inventory 2013 and supporting data
- CT GHG Emissions Inventory 2012 (released 2015)
- CT GHG Emissions Inventory 2011 (released 2014)
- Taking Action on Climate Change: 2014 Progress Report (released 2014)
- 2010 CT GHG Emissions Mitigation Options Overview (released 2010)
- 2009 CT GHG Inventory with Appendices (released 2010)
- 2007 Progress Report (released 2007)
- 2006 Progress Report (released 2007)
- CT GHG Inventory: 1990-2001 (released 2006)
- 2005 Progress Report (released 2006)
- CT GHG Inventory: 1990-2000 (released 2003)
National Greenhouse Gas Report:
Content last updated September 2025