Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Kimberly Clark-Unit 1,2,3 | Kimberly-Clark Corporation | New Milford, CT | ISO New England (ISNE) | 233.3 GWh | Mar 2008 | Dec 2025 | Natural Gas |
| Kleen Energy Systems | Kleen Energy Systems, LLC | Middletown, CT | ISO New England (ISNE) | 3.9 TWh | Jun 2011 | Aug 2026 | Natural Gas : 98.0% Distillate Fuel Oil : 2.0% |
Browse Power Plants By Connecticut Counties
Figures are based on August 2026 generation numbers.| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Capitol Planning Region, CT | # 7 | 61 | 882.7 GWh |
| Greater Bridgeport Planning Region, CT | # 2 | 10 | 6.8 TWh |
| Lower Connecticut River Valley Planning Region, CT | # 5 | 16 | 4.1 TWh |
| Naugatuck Valley Planning Region, CT | # 4 | 17 | 6.0 TWh |
| Northeastern Connecticut Planning Region, CT | # 3 | 17 | 6.2 TWh |
| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Northwest Hills Planning Region, CT | # 9 | 15 | 101.2 GWh |
| South Central Connecticut Planning Region, CT | # 6 | 23 | 3.6 TWh |
| Southeastern Connecticut Planning Region, CT | # 1 | 53 | 17.9 TWh |
| Western Connecticut Planning Region, CT | # 8 | 15 | 248.1 GWh |