Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Gary Court 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 381.0 MWh | Jun 2010 | Dec 2025 | Distillate Fuel Oil |
| GenConn Devon LLC | GenConn Devon LLC | Milford, CT | ISO New England (ISNE) | 15.1 GWh | May 2010 | Dec 2025 | Kerosene : 75.4% Natural Gas : 24.6% |
| GenConn Middletown LLC | GenConn Middletown LLC | Middletown, CT | ISO New England (ISNE) | 6.5 GWh | May 2011 | Dec 2025 | Kerosene : 77.4% Natural Gas : 22.6% |
| Generate Colchester Fuel Cells, LLC | Generate Colchester Fuel Cells, LLC | Colchester, CT | ISO New England (ISNE) | 72.4 GWh | Sep 2021 | Dec 2025 | Natural Gas |
| Glastonbury Solar One | NJR Clean Energy Ventures Corporation | Glastonbury, CT | ISO New England (ISNE) | 821.0 MWh | Aug 2025 | Dec 2025 | Solar |
| Goodwin Hydroelectric | Metropolitan Dist of Hartford | W. Hartland, CT | ISO New England (ISNE) | 7.8 GWh | Mar 1986 | Oct 2025 | Water |
| Gravel Pit Solar, LLC | Gravel Pit Solar, LLC | East Windsor, CT | ISO New England (ISNE) | 186.8 GWh | Jan 2025 | May 2026 | Solar |
Browse Power Plants By Connecticut Counties
Figures are based on May 2026 generation numbers.| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Capitol Planning Region, CT | # 7 | 61 | 853.4 GWh |
| Greater Bridgeport Planning Region, CT | # 2 | 10 | 6.7 TWh |
| Lower Connecticut River Valley Planning Region, CT | # 5 | 16 | 3.8 TWh |
| Naugatuck Valley Planning Region, CT | # 4 | 17 | 5.9 TWh |
| Northeastern Connecticut Planning Region, CT | # 3 | 17 | 6.2 TWh |
| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Northwest Hills Planning Region, CT | # 9 | 15 | 98.0 GWh |
| South Central Connecticut Planning Region, CT | # 6 | 23 | 3.6 TWh |
| Southeastern Connecticut Planning Region, CT | # 1 | 52 | 18.1 TWh |
| Western Connecticut Planning Region, CT | # 8 | 15 | 246.3 GWh |