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 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