Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Algonquin Windsor Locks | Ahlstrom Power Windsor Locks LLC | Windsor Locks, CT | ISO New England (ISNE) | 119.4 GWh | Dec 1989 | Aug 2025 | Natural Gas : 99.9% |
| Antares-GRE 314 East Lyme LLC | MN8 Energy LLC | East Lyme, CT | ISO New England (ISNE) | 3.7 GWh | May 2014 | Aug 2025 | Solar |
| Advance Stores Company, Inc | Tesla Inc. | Enfield, CT | ISO New England (ISNE) | 1.1 GWh | Oct 2014 | Dec 2024 | Solar |
| Adams Solar | Ecos Energy LLC | Lebanon, CT | ISO New England (ISNE) | 1.5 GWh | Feb 2018 | Dec 2024 | Solar |
| ALDI DC 2 | Powerflex | South Windsor, CT | ISO New England (ISNE) | 1.4 GWh | Jan 2018 | Dec 2024 | Solar |
| Amazon BDL3 Solar Project | Solar Star Prime 1 LLC | New Haven, CT | ISO New England (ISNE) | 1.6 GWh | Sep 2019 | Dec 2024 | Solar |
Browse Power Plants By Connecticut Counties
Figures are based on August 2025 generation numbers.| County | State Rank | Active Plants | Aug 2025 Generation |
|---|---|---|---|
| Southeastern Connecticut Planning Region, CT | # 1 | 51 | 16.7 TWh |
| Greater Bridgeport Planning Region, CT | # 2 | 10 | 7.0 TWh |
| Northeastern Connecticut Planning Region, CT | # 3 | 17 | 6.2 TWh |
| Naugatuck Valley Planning Region, CT | # 4 | 17 | 5.4 TWh |
| South Central Connecticut Planning Region, CT | # 5 | 23 | 4.0 TWh |
| County | State Rank | Active Plants | Aug 2025 Generation |
|---|---|---|---|
| Lower Connecticut River Valley Planning Region, CT | # 6 | 16 | 3.2 TWh |
| Capitol Planning Region, CT | # 7 | 56 | 734.0 GWh |
| Western Connecticut Planning Region, CT | # 8 | 15 | 178.7 GWh |
| Northwest Hills Planning Region, CT | # 9 | 15 | 73.6 GWh |