Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Park Solar | Ecos Energy LLC | Woodbridge, CT | ISO New England (ISNE) | 866.0 MWh | Nov 2023 | Dec 2024 | Solar |
| Plainfield Solar 1 | Ecos Energy LLC | Plainfield, CT | ISO New England (ISNE) | 1.5 GWh | Dec 2019 | Dec 2024 | Solar |
| Plainfield Solar 2 | Ecos Energy LLC | Plainfield, CT | ISO New England (ISNE) | 1.5 GWh | Mar 2020 | Dec 2024 | Solar |
| Platt Hill | LSE Pictor LLC | Winchester, CT | ISO New England (ISNE) | 2.4 GWh | Dec 2021 | Dec 2024 | Solar |
| Powder Hill | LSE Delphinus LLC | Enfield, CT | ISO New England (ISNE) | 3.3 GWh | Nov 2020 | Dec 2023 | Solar |
| Pepperidge Farm Bloomfield | Pepperidge Farm, Inc.- Bloomfield | Bloomfield, CT | ISO New England (ISNE) | 15.5 GWh | Jul 2008 | Dec 2024 | Natural Gas |
| Pfizer Groton Fuel Cell | Groton Fuel Cell 1 LLC | Groton, CT | ISO New England (ISNE) | 30.1 GWh | Sep 2016 | Dec 2024 | Natural Gas |
| Pfizer Groton Plant | Pfizer Inc | Groton, CT | ISO New England (ISNE) | 80.4 GWh | Dec 1947 | Apr 2025 | Natural Gas : 94.4% Distillate Fuel Oil : 5.6% |
| Pratt & Whitney | United Technologies | East Hartford, CT | ISO New England (ISNE) | 104.1 GWh | Dec 1991 | Apr 2025 | Natural Gas |
| Plainfield Renewable Energy LLC | Plainfield Renewable Energy, LLC | Plainfield, CT | ISO New England (ISNE) | 247.0 GWh | Nov 2013 | Oct 2024 | Wood/Wood Waste Solids : 99.5% |
Browse Power Plants By Connecticut Counties
Figures are based on March 2025 generation numbers.| County | State Rank | Active Plants | Mar 2025 Generation |
|---|---|---|---|
| Northwest Hills Planning Region, CT | # 9 | 15 | 66.6 GWh |
| Western Connecticut Planning Region, CT | # 8 | 15 | 178.3 GWh |
| Capitol Planning Region, CT | # 7 | 54 | 682.7 GWh |
| Lower Connecticut River Valley Planning Region, CT | # 6 | 16 | 3.5 TWh |
| South Central Connecticut Planning Region, CT | # 5 | 23 | 3.9 TWh |
| County | State Rank | Active Plants | Mar 2025 Generation |
|---|---|---|---|
| Naugatuck Valley Planning Region, CT | # 4 | 15 | 5.7 TWh |
| Northeastern Connecticut Planning Region, CT | # 3 | 17 | 6.2 TWh |
| Greater Bridgeport Planning Region, CT | # 2 | 10 | 7.2 TWh |
| Southeastern Connecticut Planning Region, CT | # 1 | 50 | 17.3 TWh |