Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| McHenry Solar | Ecos Energy LLC | Hampton, CT | ISO New England (ISNE) | 1.6 GWh | Sep 2021 | Dec 2024 | Solar |
| Sydney Solar | Ecos Energy LLC | Hampton, CT | ISO New England (ISNE) | 2.9 GWh | May 2020 | Dec 2024 | Solar |
| Dickinson Solar (CT) | Ecos Energy LLC | Hampton, CT | ISO New England (ISNE) | 2.9 GWh | May 2020 | Dec 2024 | Solar |
| Water Treatment 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 445.0 MWh | Sep 2010 | Mar 2026 | Distillate Fuel Oil |
| Pfizer Groton Fuel Cell | Groton Fuel Cell 1 LLC | Groton, CT | ISO New England (ISNE) | 30.1 GWh | Sep 2016 | Dec 2024 | Natural Gas |
| Subase Microgrid Project | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 43.1 GWh | Nov 2022 | Dec 2024 | Natural Gas |
| Pfizer Groton Plant | Pfizer Inc | Groton, CT | ISO New England (ISNE) | 75.8 GWh | Dec 1947 | Mar 2026 | Natural Gas : 88.1% Distillate Fuel Oil : 11.9% |
| Gary Court 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 422.0 MWh | Jun 2010 | Dec 2024 | Distillate Fuel Oil |
| CMEEC - Navy NE Trident | Tesla Inc. | Groton, CT | ISO New England (ISNE) | 1.3 GWh | May 2017 | Dec 2024 | Solar |
| Naval Sub Base New London Fuel Cell | Groton Station Fuel Cell, LLC | Groton, CT | ISO New England (ISNE) | 43.6 GWh | Nov 2022 | Dec 2024 | Natural Gas |
| Bridge Street 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 458.0 MWh | Jun 2010 | Dec 2024 | Distillate Fuel Oil |
| Clinton Solar | Ecos Energy LLC | Griswold, CT | ISO New England (ISNE) | 1.7 GWh | Apr 2021 | Dec 2024 | Solar |
| Jackson Solar (CT) | Ecos Energy LLC | Griswold, CT | ISO New England (ISNE) | 1.4 GWh | Nov 2019 | Dec 2024 | Solar |
| Sherman Solar | Ecos Energy LLC | Griswold, CT | ISO New England (ISNE) | 1.4 GWh | Nov 2019 | Dec 2024 | Solar |
| Cos Cob | Connecticut Jet Power LLC | Greenwich, CT | ISO New England (ISNE) | 676.0 MWh | Aug 1969 | Dec 2024 | Kerosene |
| Manchester Community College North | Onyx Asset Services Group | Great Path, CT | ISO New England (ISNE) | 1.5 GWh | Sep 2018 | Dec 2024 | Solar |
| CMEEC - Polaris Park Solar Hybrid | Tesla Inc. | Gordon, CT | ISO New England (ISNE) | 5.0 GWh | Jul 2017 | Dec 2024 | Solar |
| UDR Glastonbury Fuel Cell | UIL Distributed Resources, LLC | Glastonbury, CT | ISO New England (ISNE) | 17.7 GWh | Jan 2016 | Dec 2024 | Natural Gas |
| Falls Village | FirstLight Power Resources Services LLC | Falls Village, CT | ISO New England (ISNE) | 30.1 GWh | Dec 1913 | Dec 2024 | Water |
| Fairfield University CHP Plant | Fairfield University | Fairfield, CT | ISO New England (ISNE) | 26.1 GWh | Sep 2007 | Dec 2024 | Natural Gas |
| Nutmeg Solar | Nutmeg Solar LLC | Enfield, CT | ISO New England (ISNE) | 34.4 GWh | Nov 2020 | 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 |
| Powder Hill | LSE Delphinus LLC | Enfield, CT | ISO New England (ISNE) | 3.3 GWh | Nov 2020 | Dec 2024 | Solar |
| Advance Stores Company, Inc | Tesla Inc. | Enfield, CT | ISO New England (ISNE) | 1.1 GWh | Oct 2014 | 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 |
| East Windsor Solar One | DG Connecticut III, LLC | East Windsor, CT | ISO New England (ISNE) | 8.5 GWh | Nov 2021 | Dec 2024 | Solar |
| Norcap North | LSE Canes Venatici LLC | East Windsor, CT | ISO New England (ISNE) | 3.5 GWh | Nov 2017 | Dec 2024 | Solar |
| Norcap South | LSE Coma Berenices LLC | East Windsor, CT | ISO New England (ISNE) | 3.6 GWh | Nov 2017 | Dec 2024 | Solar |
| Gravel Pit Solar, LLC | Gravel Pit Solar, LLC | East Windsor, CT | ISO New England (ISNE) | 169.8 GWh | - | Mar 2026 | Solar |
| Antares-GRE 314 East Lyme LLC | MN8 Energy LLC | East Lyme, CT | ISO New England (ISNE) | 4.4 GWh | May 2014 | Mar 2026 | Solar |
| Pratt & Whitney | United Technologies | East Hartford, CT | ISO New England (ISNE) | 65.6 GWh | Dec 1991 | Mar 2026 | Natural Gas |
| Cellu Tissue | Dunn Paper East Hartford, LLC | East Hartford, CT | ISO New England (ISNE) | 11.5 GWh | Apr 2009 | Mar 2026 | 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 |
| Derby Fuel Cell | Derby Fuel Cell LLC | Derby, CT | ISO New England (ISNE) | 105.9 GWh | Dec 2023 | Dec 2024 | Natural Gas |
| Lake Road Generating Plant | Lake Road Generating Co LP | Dayville, CT | ISO New England (ISNE) | 5.8 TWh | Feb 2002 | Mar 2026 | Natural Gas |
| Frito Lay Incorporated | Frito Lay Incorporated Dayville | Dayville, CT | ISO New England (ISNE) | 24.9 GWh | Feb 2009 | Mar 2026 | Natural Gas |
| Danbury Hospital Cogen Plant | Danbury Hospital | Danbury, CT | ISO New England (ISNE) | 28.1 GWh | Oct 2011 | Dec 2024 | Natural Gas |
| Wind Colebrook South | Wind Colebrook South | Colebrook, CT | ISO New England (ISNE) | 12.2 GWh | Oct 2015 | Feb 2026 | Wind |
| Generate Colchester Fuel Cells, LLC | Generate Colchester Fuel Cells, LLC | Colchester, CT | ISO New England (ISNE) | 76.7 GWh | Sep 2021 | Dec 2024 | Natural Gas |
| Quinebaug Solar | Quinebaug Solar, LLC | Canterbury, CT | ISO New England (ISNE) | 73.0 GWh | Nov 2021 | Mar 2026 | Solar |
| Burlington Solar 1 | DG Connecticut III, LLC | Burlington, CT | ISO New England (ISNE) | 5.6 GWh | Jan 2022 | Dec 2024 | Solar |
| Quinebaug Lower Project | Quinebaug Associates LLC | Brooklyn, CT | ISO New England (ISNE) | 6.4 GWh | Mar 1990 | Dec 2024 | Water |
| Bristol Solar One, LLC | DG Connecticut III, LLC | Bristol, CT | ISO New England (ISNE) | 4.9 GWh | Apr 2021 | Dec 2024 | Solar |
| Covanta Bristol Energy | Covanta Bristol Inc | Bristol, CT | ISO New England (ISNE) | 108.8 GWh | Nov 1987 | Mar 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| UI RCP Bridgeport Seaside | United Illuminating Co | Bridgeport, CT | ISO New England (ISNE) | 18.0 GWh | Oct 2015 | Mar 2026 | Natural Gas : 85.2% Solar : 14.8% |
| Bridgeport Fuel Cell, LLC | Bridgeport Fuel Cell, LLC | Bridgeport, CT | ISO New England (ISNE) | 96.8 GWh | Nov 2013 | Dec 2024 | Natural Gas |
| Wheelabrator Bridgeport | Wheelabrator Environmental Systems | Bridgeport, CT | ISO New England (ISNE) | 439.3 GWh | Jun 1988 | Mar 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Bridgeport Energy Project | Bridgeport Energy LLC | Bridgeport, CT | ISO New England (ISNE) | 2.6 TWh | May 1998 | Mar 2026 | Natural Gas |
| Bridgeport Station | Generation Bridge II Connecticut, LLC | Bridgeport, CT | ISO New England (ISNE) | 3.4 TWh | Jul 1961 | Mar 2026 | Natural Gas : 85.4% Distillate Fuel Oil : 14.6% |
| Branford | Connecticut Jet Power LLC | Branford, CT | ISO New England (ISNE) | 109.0 MWh | Oct 1967 | Dec 2024 | Kerosene |
| Town of Branford | Tesla Inc. | Branford, CT | ISO New England (ISNE) | 1.6 GWh | May 2018 | Dec 2024 | Solar |
| CMEEC - Bozrah | Tesla Inc. | Bozrah, CT | ISO New England (ISNE) | 3.0 GWh | Nov 2016 | 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 |
| Niagara Bottling - Bloomfield | Westbound Solar 3, LLC | Bloomfield, CT | ISO New England (ISNE) | 4.5 GWh | Oct 2022 | Dec 2024 | Solar |
| Corbin Russwin Phase 3 Berlin | Powerflex | Berlin, CT | ISO New England (ISNE) | 1.7 GWh | Mar 2018 | Dec 2024 | Solar |
| Fusion Solar Center LLC | Fusion Solar Centre, L.L.C | Baltic, CT | ISO New England (ISNE) | 37.2 GWh | Feb 2018 | Mar 2026 | Solar |
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 | 180.8 GWh |
| Capitol Planning Region, CT | # 7 | 56 | 814.6 GWh |
| South Central Connecticut Planning Region, CT | # 6 | 23 | 3.6 TWh |
| Lower Connecticut River Valley Planning Region, CT | # 5 | 16 | 3.8 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 |