Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Quinebaug Solar | Quinebaug Solar, LLC | Canterbury, CT | ISO New England (ISNE) | 74.1 GWh | Nov 2021 | Feb 2026 | Solar |
| Quinebaug Lower Project | Quinebaug Associates LLC | Brooklyn, CT | ISO New England (ISNE) | 6.4 GWh | Mar 1990 | Dec 2024 | Water |
Browse Power Plants By Connecticut Counties
Figures are based on February 2026 generation numbers.| County | State Rank | Active Plants | Feb 2026 Generation |
|---|---|---|---|
| Northwest Hills Planning Region, CT | # 9 | 15 | 73.2 GWh |
| Western Connecticut Planning Region, CT | # 8 | 15 | 179.6 GWh |
| Capitol Planning Region, CT | # 7 | 56 | 793.7 GWh |
| South Central Connecticut Planning Region, CT | # 6 | 23 | 3.6 TWh |
| Lower Connecticut River Valley Planning Region, CT | # 5 | 16 | 3.6 TWh |
| County | State Rank | Active Plants | Feb 2026 Generation |
|---|---|---|---|
| Naugatuck Valley Planning Region, CT | # 4 | 17 | 5.3 TWh |
| Northeastern Connecticut Planning Region, CT | # 3 | 17 | 6.2 TWh |
| Greater Bridgeport Planning Region, CT | # 2 | 10 | 6.7 TWh |
| Southeastern Connecticut Planning Region, CT | # 1 | 51 | 17.5 TWh |