Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Derby Hydro | McCallum Enterprises I LP | Shelton, CT | ISO New England (ISNE) | 22.7 GWh | Dec 1988 | Dec 2025 | Water |
| Danbury Hospital Cogen Plant | Danbury Hospital | Danbury, CT | ISO New England (ISNE) | 21.6 GWh | Oct 2011 | Dec 2025 | Natural Gas |
| Derby Fuel Cell | Derby Fuel Cell LLC | Derby, CT | ISO New England (ISNE) | 110.3 GWh | Dec 2023 | Dec 2025 | Natural Gas |
| DWW Solar ll | DWW Solar ll LLC | Simsbury, CT | ISO New England (ISNE) | 46.1 GWh | Nov 2019 | May 2026 | Solar |
| Dickinson Solar (CT) | Ecos Energy LLC | Hampton, CT | ISO New England (ISNE) | 1.5 GWh | May 2020 | Dec 2025 | Solar |
| Dynamic Energy CT STAG | Milford Pepes Farm Road Solar LLC | Milford, CT | ISO New England (ISNE) | 2.5 GWh | Jul 2023 | Dec 2024 | Solar |
Browse Power Plants By Connecticut Counties
Figures are based on May 2026 generation numbers.| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Southeastern Connecticut Planning Region, CT | # 1 | 52 | 18.1 TWh |
| Greater Bridgeport Planning Region, CT | # 2 | 10 | 6.7 TWh |
| Northeastern Connecticut Planning Region, CT | # 3 | 17 | 6.2 TWh |
| Naugatuck Valley Planning Region, CT | # 4 | 17 | 5.9 TWh |
| Lower Connecticut River Valley Planning Region, CT | # 5 | 16 | 3.8 TWh |
| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| South Central Connecticut Planning Region, CT | # 6 | 23 | 3.6 TWh |
| Capitol Planning Region, CT | # 7 | 61 | 853.4 GWh |
| Western Connecticut Planning Region, CT | # 8 | 15 | 246.3 GWh |
| Northwest Hills Planning Region, CT | # 9 | 15 | 98.0 GWh |