Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Hartford Landfill Solar EGF | Materials Innovation Recycling Authority | Hartford, CT | ISO New England (ISNE) | 1.2 GWh | May 2014 | Dec 2024 | Solar |
| Derby Hydro | McCallum Enterprises I LP | Shelton, CT | ISO New England (ISNE) | 23.9 GWh | Dec 1988 | Dec 2024 | Water |
| Goodwin Hydroelectric | Metropolitan Dist of Hartford | W. Hartland, CT | ISO New England (ISNE) | 8.9 GWh | Mar 1986 | Dec 2024 | Water |
| Middletown | Middletown Power LLC | Middletown, CT | ISO New England (ISNE) | 33.0 GWh | Sep 1958 | Dec 2024 | Residual Fuel Oil : 60.6% Natural Gas : 39.3% |
| Dynamic Energy CT STAG | Milford Pepes Farm Road Solar LLC | Milford, CT | ISO New England (ISNE) | 2.5 GWh | Jul 2023 | Dec 2024 | Solar |
| Milford Power Project | Milford Power Co LLC | Milford, CT | ISO New England (ISNE) | 3.6 TWh | Jan 2004 | Sep 2025 | Natural Gas |
| Antares-GRE 314 East Lyme LLC | MN8 Energy LLC | East Lyme, CT | ISO New England (ISNE) | 3.8 GWh | May 2014 | Sep 2025 | Solar |
| Montville Station | Montville Power LLC | Uncasville, CT | ISO New England (ISNE) | 27.8 GWh | Dec 1953 | Dec 2024 | Natural Gas : 52.4% Residual Fuel Oil : 46.4% Distillate Fuel Oil : 1.2% |
| CCSU Fuel Cell Project | New Britain Renewable Energy, LLC | New Britain, CT | ISO New England (ISNE) | 11.1 GWh | Mar 2012 | Dec 2024 | Natural Gas |
| CP East Hampton I & II Solar | NJR Clean Energy Ventures Corporation | East Hampton, CT | ISO New England (ISNE) | 3.3 GWh | Jan 2021 | Dec 2024 | Solar |
| Norfolk Landfill Solar Project | NJR Clean Energy Ventures Corporation | Norfolk, CT | ISO New England (ISNE) | 494.0 MWh | Nov 2024 | Dec 2024 | Solar |
| Raffia Road Solar Project | NJR Clean Energy Ventures Corporation | Enfield, CT | ISO New England (ISNE) | 11.0 MWh | Nov 2024 | Dec 2024 | Solar |
| North Haven Solar One | North Haven Solar One, LLC | North Haven, CT | ISO New England (ISNE) | 2.5 GWh | Feb 2024 | Dec 2024 | Solar |
| Nutmeg Solar | Nutmeg Solar LLC | Enfield, CT | ISO New England (ISNE) | 34.4 GWh | Nov 2020 | Dec 2024 | Solar |
| Somers Solar Center, LLC | Onward Energy | Somers, CT | ISO New England (ISNE) | 8.6 GWh | Nov 2013 | Dec 2024 | Solar |
| Barrett Farm Solar - Phase I | Onyx Asset Services Group | Thompson, CT | ISO New England (ISNE) | 2.7 GWh | Sep 2017 | Dec 2024 | Solar |
| Manchester Community College East | Onyx Asset Services Group | Manchester, CT | ISO New England (ISNE) | 1.5 GWh | Sep 2018 | Dec 2024 | Solar |
| Manchester Community College North | Onyx Asset Services Group | Great Path, CT | ISO New England (ISNE) | 1.5 GWh | Sep 2018 | Dec 2024 | Solar |
| Ellington - 277 Sadds Mill | Onyx Asset Services Group | Ellington, CT | ISO New England (ISNE) | 2.8 GWh | Feb 2024 | Dec 2024 | 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 Plant | Pfizer Inc | Groton, CT | ISO New England (ISNE) | 77.5 GWh | Dec 1947 | Sep 2025 | Natural Gas : 91.4% Distillate Fuel Oil : 8.6% |
| 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% Other Biomass Liquids : 0.5% |
| Ticket Network South Windsor | Powerflex | South Windsor, CT | ISO New England (ISNE) | 1.6 GWh | Apr 2018 | Dec 2024 | Solar |
| Corbin Russwin Phase 3 Berlin | Powerflex | Berlin, CT | ISO New England (ISNE) | 1.7 GWh | Mar 2018 | Dec 2024 | Solar |
| ALDI DC 2 | Powerflex | South Windsor, CT | ISO New England (ISNE) | 1.4 GWh | Jan 2018 | Dec 2024 | Solar |
| Quinebaug Lower Project | Quinebaug Associates LLC | Brooklyn, CT | ISO New England (ISNE) | 6.4 GWh | Mar 1990 | Dec 2024 | Water |
| Quinebaug Solar | Quinebaug Solar, LLC | Canterbury, CT | ISO New England (ISNE) | 80.6 GWh | Nov 2021 | Sep 2025 | Solar |
| Rand Whitney CHP Plant | Rand Whitney Containerboard L.P. | Montville, CT | ISO New England (ISNE) | 134.9 GWh | Mar 2005 | Sep 2025 | Natural Gas |
| Sikorsky Aircraft CHP | Sikorsky Aircraft Corporation | Stratford, CT | ISO New England (ISNE) | 53.1 GWh | May 2010 | Dec 2024 | Natural Gas : 99.8% |
| Amazon BDL3 Solar Project | Solar Star Prime 1 LLC | New Haven, CT | ISO New England (ISNE) | 1.6 GWh | Sep 2019 | Dec 2024 | Solar |
| South Windsor Fuel Cell | South Energy Investments LLC | South Windsor, CT | ISO New England (ISNE) | 38.9 GWh | Feb 2020 | Dec 2024 | Natural Gas |
| SR North Stonington | SR North Stonington, LLC | North Stonington, CT | ISO New England (ISNE) | 13.2 GWh | Feb 2024 | Dec 2024 | Solar |
| Stamford Health Tully Health Center | Stamford Health Tully Health Center | Stamford, CT | ISO New England (ISNE) | 5.0 GWh | Apr 2002 | Dec 2024 | Natural Gas |
| CMEEC - Polaris Park Solar Hybrid | Tesla Inc. | Gordon, CT | ISO New England (ISNE) | 5.0 GWh | Jul 2017 | Dec 2024 | Solar |
| Advance Stores Company, Inc | Tesla Inc. | Enfield, CT | ISO New England (ISNE) | 1.1 GWh | Oct 2014 | Dec 2024 | Solar |
| CMEEC - Bozrah | Tesla Inc. | Bozrah, CT | ISO New England (ISNE) | 3.0 GWh | Nov 2016 | Dec 2024 | Solar |
| Conn Mun Electric Energy Coop | Tesla Inc. | Norwich, CT | ISO New England (ISNE) | 1.1 GWh | Nov 2016 | Dec 2024 | Solar |
| CMEEC - Rogers Rd Solar | Tesla Inc. | Norwich, CT | ISO New England (ISNE) | 875.0 MWh | Jan 2017 | Dec 2024 | Solar |
| CMEEC - Navy NE Trident | Tesla Inc. | Groton, CT | ISO New England (ISNE) | 1.3 GWh | May 2017 | Dec 2024 | Solar |
| CMEEC - Norwich Stott St Solar Hybrid | Tesla Inc. | Norwich, CT | ISO New England (ISNE) | 4.0 GWh | Nov 2016 | Dec 2024 | Solar |
| Town of Rocky Hill PV CSG | Tesla Inc. | Rocky Hill, CT | ISO New England (ISNE) | 5.1 GWh | Feb 2018 | Dec 2024 | Solar |
| Town of Branford | Tesla Inc. | Branford, CT | ISO New England (ISNE) | 1.6 GWh | May 2018 | Dec 2024 | Solar |
| Stafford MS Ground Mount Community Solar | Town of Stafford - (CT) | Stafford, CT | ISO New England (ISNE) | 3.1 GWh | Jun 2016 | Dec 2024 | Solar |
| UB Fuel Cell | UB Fuel Cell | Bridgeport, CT | ISO New England (ISNE) | 10.5 GWh | Mar 2015 | Dec 2023 | Natural Gas |
| UDR Glastonbury Fuel Cell | UIL Distributed Resources, LLC | Glastonbury, CT | ISO New England (ISNE) | 17.7 GWh | Jan 2016 | Dec 2024 | Natural Gas |
| UI RCP Woodbridge FC | United Illuminating Co | Woodbridge, CT | ISO New England (ISNE) | 17.7 GWh | Nov 2016 | Dec 2024 | Natural Gas |
| UI RCP Bridgeport Seaside | United Illuminating Co | Bridgeport, CT | ISO New England (ISNE) | 20.6 GWh | Oct 2015 | Sep 2025 | Natural Gas : 84.6% Solar : 15.4% |
| UI RCP New Haven Fuel Cell | United Illuminating Co | New Haven, CT | ISO New England (ISNE) | 13.0 GWh | Jul 2015 | Sep 2025 | Natural Gas |
| Pratt & Whitney | United Technologies | East Hartford, CT | ISO New England (ISNE) | 81.9 GWh | Dec 1991 | Sep 2025 | Natural Gas |
| UCONN Cogen Facility | University of Connecticut | Storrs, CT | ISO New England (ISNE) | 123.8 GWh | Feb 2006 | Sep 2025 | Natural Gas : 98.9% Distillate Fuel Oil : 1.1% |
| FedEx Middletown | VCP Realty, LLC | Middletown, CT | ISO New England (ISNE) | 151.0 MWh | Oct 2024 | Dec 2024 | Solar |
| Wallingford Energy | Wallingford Energy LLC | Wallingford, CT | ISO New England (ISNE) | 87.8 GWh | Jul 2001 | Dec 2024 | Natural Gas |
| Wallingford Solar | Wallingford Renewable Energy, LLC | Wallingford, CT | ISO New England (ISNE) | 20.9 GWh | Aug 2021 | Dec 2024 | Solar |
| Waterside Power, LLC | Waterside Power, LLC | Stamford, CT | ISO New England (ISNE) | 2.1 GWh | May 2003 | Dec 2024 | Distillate Fuel Oil |
| Wesleyan University Cogen 1 | Wesleyan University | Middletown, CT | ISO New England (ISNE) | 7.3 GWh | Jan 2009 | Dec 2024 | Natural Gas |
| Niagara Bottling - Bloomfield | Westbound Solar 3, LLC | Bloomfield, CT | ISO New England (ISNE) | 4.5 GWh | Oct 2022 | Dec 2024 | Solar |
| Wheelabrator Lisbon | Wheelabrator Environmental Systems | Lisbon, CT | ISO New England (ISNE) | 101.0 GWh | Sep 1995 | Sep 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator Bridgeport | Wheelabrator Environmental Systems | Bridgeport, CT | ISO New England (ISNE) | 473.1 GWh | Jun 1988 | Sep 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wind Colebrook South | Wind Colebrook South | Colebrook, CT | ISO New England (ISNE) | 10.9 GWh | Oct 2015 | Sep 2025 | Wind |
| New Milford Gas Recovery | WM Renewable Energy LLC | New Milford, CT | ISO New England (ISNE) | 4.7 GWh | Apr 2008 | Dec 2024 | Landfill Gas |
| Woods Hill Solar | Woods Hill Solar, LLC | Pomfret, CT | ISO New England (ISNE) | 25.2 GWh | Nov 2018 | Sep 2025 | Solar |
Browse Power Plants By Connecticut Counties
Figures are based on September 2025 generation numbers.| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Southeastern Connecticut Planning Region, CT | # 1 | 51 | 17.1 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 | 5.6 TWh |
| South Central Connecticut Planning Region, CT | # 5 | 23 | 3.9 TWh |
| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Lower Connecticut River Valley Planning Region, CT | # 6 | 16 | 3.3 TWh |
| Capitol Planning Region, CT | # 7 | 56 | 761.3 GWh |
| Western Connecticut Planning Region, CT | # 8 | 15 | 178.8 GWh |
| Northwest Hills Planning Region, CT | # 9 | 15 | 73.7 GWh |