Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Backus Microgrid Project | Connecticut Mun Elec Engy Coop | Norwich, CT | ISO New England (ISNE) | 789.0 MWh | Jul 2014 | Sep 2025 | Distillate Fuel Oil |
| Jewett City 1 | Connecticut Mun Elec Engy Coop | Jewett City, CT | ISO New England (ISNE) | 205.0 MWh | Jan 2010 | Dec 2024 | Distillate Fuel Oil |
| 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 |
| Fort Hill 1, 2, 3 & 4 | Connecticut Mun Elec Engy Coop | Uncasville, CT | ISO New England (ISNE) | 618.0 MWh | Jul 2010 | Sep 2025 | Distillate Fuel Oil |
| 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 |
| LNG 1 & 2 | Connecticut Mun Elec Engy Coop | Norwich, CT | ISO New England (ISNE) | 494.0 MWh | Mar 2010 | Dec 2024 | Distillate Fuel Oil |
| Lebanon Pines 1 & 2 | Connecticut Mun Elec Engy Coop | Lebanon, CT | ISO New England (ISNE) | 471.0 MWh | Mar 2010 | Dec 2024 | Distillate Fuel Oil |
| Water Treatment 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 434.0 MWh | Sep 2010 | Sep 2025 | Distillate Fuel Oil |
| Norwich WWTP | City of Norwich - (CT) | Norwich, CT | ISO New England (ISNE) | 1.0 MWh | Apr 2006 | Mar 2024 | Distillate Fuel Oil |
| Waterside Power, LLC | Waterside Power, LLC | Stamford, CT | ISO New England (ISNE) | 2.1 GWh | May 2003 | Dec 2024 | Distillate Fuel Oil |
| Franklin Drive | Connecticut Jet Power LLC | Torrington, CT | ISO New England (ISNE) | 118.0 MWh | Oct 1968 | Dec 2024 | Kerosene |
| Branford | Connecticut Jet Power LLC | Branford, CT | ISO New England (ISNE) | 109.0 MWh | Oct 1967 | Dec 2024 | Kerosene |
| Torrington Terminal | Connecticut Jet Power LLC | Torrington, CT | ISO New England (ISNE) | 146.0 MWh | Oct 1967 | Dec 2024 | Kerosene |
| Cos Cob | Connecticut Jet Power LLC | Greenwich, CT | ISO New England (ISNE) | 676.0 MWh | Aug 1969 | Dec 2024 | Kerosene |
| GenConn Middletown LLC | GenConn Middletown LLC | Middletown, CT | ISO New England (ISNE) | 5.9 GWh | May 2011 | Dec 2024 | Kerosene : 57.4% Natural Gas : 42.6% |
| GenConn Devon LLC | GenConn Devon LLC | Milford, CT | ISO New England (ISNE) | 4.3 GWh | May 2010 | Dec 2024 | Kerosene : 90.3% Natural Gas : 9.7% |
| New Milford Gas Recovery | WM Renewable Energy LLC | New Milford, CT | ISO New England (ISNE) | 4.7 GWh | Apr 2008 | Dec 2024 | Landfill Gas |
| Medtronic - New Haven | Bloom Energy | North Haven, CT | ISO New England (ISNE) | 2.2 GWh | Sep 2020 | Dec 2024 | Natural Gas |
| UB Fuel Cell | UB Fuel Cell | Bridgeport, CT | ISO New England (ISNE) | 10.5 GWh | Mar 2015 | Dec 2023 | Natural Gas |
| Derby Fuel Cell | Derby Fuel Cell LLC | Derby, CT | ISO New England (ISNE) | 105.9 GWh | Dec 2023 | Dec 2024 | Natural Gas |
| Digital Fairfield | Bloom Energy | Trumbull, CT | ISO New England (ISNE) | 10.1 GWh | May 2018 | Jun 2024 | Natural Gas |
| South Windsor Fuel Cell | South Energy Investments LLC | South Windsor, CT | ISO New England (ISNE) | 38.9 GWh | Feb 2020 | Dec 2024 | Natural Gas |
| FDX010.0 FedEx Fuel Cell | 2016 ESA Project Company, LLC | Middletown, CT | ISO New England (ISNE) | 7.9 GWh | Aug 2018 | Dec 2024 | Natural Gas |
| Trinity College Fuel Cell | AEP Onsite Partners, LLC | Hartford, CT | ISO New England (ISNE) | 11.5 GWh | Jul 2018 | Dec 2024 | Natural Gas |
| 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 |
| Foxwoods CoGen | Foxwoods Resort Casino | Mashantucket, CT | ISO New England (ISNE) | 10.8 GWh | May 2010 | Dec 2024 | Natural Gas |
| Medtronic - New Haven 2 | Bloom Energy | North Haven, CT | ISO New England (ISNE) | 15.7 GWh | Sep 2020 | Dec 2024 | Natural Gas |
| Kimberly Clark-Unit 1,2,3 | Kimberly-Clark Corporation | New Milford, CT | ISO New England (ISNE) | 219.0 GWh | Mar 2008 | Dec 2024 | Natural Gas |
| Cellu Tissue | Dunn Paper East Hartford, LLC | East Hartford, CT | ISO New England (ISNE) | 11.2 GWh | Apr 2009 | Sep 2025 | Natural Gas |
| Danbury Hospital Cogen Plant | Danbury Hospital | Danbury, CT | ISO New England (ISNE) | 28.1 GWh | Oct 2011 | Dec 2024 | Natural Gas |
| Wesleyan University Cogen 1 | Wesleyan University | Middletown, CT | ISO New England (ISNE) | 7.3 GWh | Jan 2009 | Dec 2024 | Natural Gas |
| Rand Whitney CHP Plant | Rand Whitney Containerboard L.P. | Montville, CT | ISO New England (ISNE) | 134.9 GWh | Mar 2005 | Sep 2025 | Natural Gas |
| CCSU Co-Gen-STBY Gen | Central Connecticut State University | New Britain, CT | ISO New England (ISNE) | 90.2 MWh | Sep 1993 | Dec 2024 | Natural Gas |
| 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 |
| Bradley Energy Center | Ameresco Select Inc | Windsor Locks, CT | ISO New England (ISNE) | 11.8 GWh | Oct 2002 | Dec 2024 | Natural Gas |
| Bridgeport Fuel Cell, LLC | Bridgeport Fuel Cell, LLC | Bridgeport, CT | ISO New England (ISNE) | 96.8 GWh | Nov 2013 | Dec 2024 | Natural Gas |
| Yale New Haven - New London | Bloom Energy | New London, CT | ISO New England (ISNE) | 14.6 GWh | Aug 2022 | Dec 2024 | Natural Gas |
| Frito Lay Incorporated | Frito Lay Incorporated Dayville | Dayville, CT | ISO New England (ISNE) | 24.2 GWh | Feb 2009 | Sep 2025 | Natural Gas |
| 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 |
| Subase Microgrid Project | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 43.1 GWh | Nov 2022 | Dec 2024 | Natural Gas |
| Pepperidge Farm Bloomfield | Pepperidge Farm, Inc.- Bloomfield | Bloomfield, CT | ISO New England (ISNE) | 15.5 GWh | Jul 2008 | Dec 2024 | Natural Gas |
| 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 |
| UDR Glastonbury Fuel Cell | UIL Distributed Resources, LLC | Glastonbury, CT | ISO New England (ISNE) | 17.7 GWh | Jan 2016 | Dec 2024 | Natural Gas |
| Connecticut College | Bloom Energy | New London, CT | ISO New England (ISNE) | 9.1 GWh | Aug 2019 | Dec 2024 | Natural Gas |
| 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 |
| Pfizer Groton Fuel Cell | Groton Fuel Cell 1 LLC | Groton, CT | ISO New England (ISNE) | 30.1 GWh | Sep 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 |
| Fairfield University CHP Plant | Fairfield University | Fairfield, CT | ISO New England (ISNE) | 26.1 GWh | Sep 2007 | Dec 2024 | Natural Gas |
| HSCo CHP | Cartier Energy, LLC | Hartford, CT | ISO New England (ISNE) | 27.3 GWh | Sep 2009 | Dec 2024 | Natural Gas |
| Hartford Hospital Cogeneration | Cartier Energy, LLC | Hartford, CT | ISO New England (ISNE) | 39.5 GWh | Jun 1988 | Dec 2024 | Natural Gas |
| Pratt & Whitney | United Technologies | East Hartford, CT | ISO New England (ISNE) | 81.9 GWh | Dec 1991 | Sep 2025 | Natural Gas |
| Bridgeport Energy Project | Bridgeport Energy LLC | Bridgeport, CT | ISO New England (ISNE) | 2.4 TWh | May 1998 | Sep 2025 | Natural Gas |
| Milford Power Project | Milford Power Co LLC | Milford, CT | ISO New England (ISNE) | 3.6 TWh | Jan 2004 | Sep 2025 | Natural Gas |
| Lake Road Generating Plant | Lake Road Generating Co LP | Dayville, CT | ISO New England (ISNE) | 5.8 TWh | Feb 2002 | Sep 2025 | Natural Gas |
| Wallingford Energy | Wallingford Energy LLC | Wallingford, CT | ISO New England (ISNE) | 87.8 GWh | Jul 2001 | Dec 2024 | Natural Gas |
| CPV Towantic Energy Center | CPV Towantic, LLC | Oxford, CT | ISO New England (ISNE) | 5.2 TWh | Apr 2018 | Sep 2025 | Natural Gas |
| 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% |
| New Haven Harbor | Generation Bridge II Connecticut, LLC | New Haven, CT | ISO New England (ISNE) | 92.5 GWh | Jun 1975 | Sep 2025 | Natural Gas : 72.8% Residual Fuel Oil : 17.4% Distillate Fuel Oil : 6.4% Kerosene : 3.3% |
| IKEA New Haven Rooftop PV & Fuel Cell | IKEA Property Inc | New Haven, CT | ISO New England (ISNE) | 2.8 GWh | Jun 2012 | Dec 2024 | Natural Gas : 73.1% Solar : 26.9% |
| 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% |
| 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% |
| Bridgeport Station | Generation Bridge II Connecticut, LLC | Bridgeport, CT | ISO New England (ISNE) | 3.5 TWh | Jul 1961 | Sep 2025 | Natural Gas : 98.6% Distillate Fuel Oil : 1.4% |
| 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% |
| Kleen Energy Systems Project | Kleen Energy Systems, LLC | Middletown, CT | ISO New England (ISNE) | 3.1 TWh | Jun 2011 | Sep 2025 | Natural Gas : 99.3% Distillate Fuel Oil : 0.7% |
| Waterbury Generation | Engie North America | Waterbury, CT | ISO New England (ISNE) | 43.8 GWh | May 2009 | Dec 2024 | Natural Gas : 99.8% |
| Sikorsky Aircraft CHP | Sikorsky Aircraft Corporation | Stratford, CT | ISO New England (ISNE) | 53.1 GWh | May 2010 | Dec 2024 | Natural Gas : 99.8% |
| Algonquin Windsor Locks | Ahlstrom Power Windsor Locks LLC | Windsor Locks, CT | ISO New England (ISNE) | 125.2 GWh | Dec 1989 | Sep 2025 | Natural Gas : 99.9% |
| Covanta Southeastern Connecticut Company | Covanta Southeastern Connecticut Company | Preston, CT | ISO New England (ISNE) | 113.3 GWh | Nov 1991 | Sep 2025 | Non-biogenic Municipal Solid Waste : 54.1% Biogenic Municipal Solid Waste : 44.2% Distillate Fuel Oil : 1.7% |
| 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% |
| Covanta Bristol Energy | Covanta Bristol Inc | Bristol, CT | ISO New England (ISNE) | 107.8 GWh | Nov 1987 | Sep 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Millstone | Dominion Energy Nuclear Conn Inc | Waterford, CT | ISO New England (ISNE) | 16.3 TWh | Nov 1975 | Sep 2025 | Nuclear |
| 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% |
| Madison Solar (CT) | Ecos Energy LLC | Somers, CT | ISO New England (ISNE) | 1.7 GWh | Dec 2020 | Dec 2024 | Solar |
| Bristol Solar One, LLC | DG Connecticut III, LLC | Bristol, CT | ISO New England (ISNE) | 4.9 GWh | Apr 2021 | Dec 2024 | Solar |
| Torrington Solar One, LLC | DG Connecticut III, LLC | Torrington, CT | ISO New England (ISNE) | 3.2 GWh | Feb 2021 | Dec 2024 | Solar |
| Dynamic Energy CT STAG | Milford Pepes Farm Road Solar LLC | Milford, CT | ISO New England (ISNE) | 2.5 GWh | Jul 2023 | Dec 2024 | Solar |
| Wallingford Solar | Wallingford Renewable Energy, LLC | Wallingford, CT | ISO New England (ISNE) | 20.9 GWh | Aug 2021 | Dec 2024 | Solar |
| Quinebaug Solar | Quinebaug Solar, LLC | Canterbury, CT | ISO New England (ISNE) | 80.6 GWh | Nov 2021 | Sep 2025 | Solar |
| Plainfield Solar 1 | Ecos Energy LLC | Plainfield, CT | ISO New England (ISNE) | 1.5 GWh | Dec 2019 | 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 |
| 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 |
| Few Solar | Ecos Energy LLC | Somers, CT | ISO New England (ISNE) | 1.6 GWh | Dec 2020 | Dec 2024 | Solar |
| Watertown Solar One, LLC | DG Connecticut III, LLC | Watertown, CT | ISO New England (ISNE) | 2.9 GWh | May 2021 | Dec 2024 | Solar |
| Blair Solar | Ecos Energy LLC | Somers, CT | ISO New England (ISNE) | 1.6 GWh | Dec 2020 | Dec 2024 | Solar |
| SR North Stonington | SR North Stonington, LLC | North Stonington, CT | ISO New England (ISNE) | 13.2 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 |
| Amazon BDL3 Solar Project | Solar Star Prime 1 LLC | New Haven, CT | ISO New England (ISNE) | 1.6 GWh | Sep 2019 | Dec 2024 | Solar |
| Norcap South | LSE Coma Berenices LLC | East Windsor, CT | ISO New England (ISNE) | 3.6 GWh | Nov 2017 | Dec 2024 | Solar |
| CP Middletown Solar II LLC | Green Street Power Partners | Middletown, CT | ISO New England (ISNE) | 1.7 GWh | Nov 2019 | Dec 2024 | Solar |
| CP Middletown Solar I LLC | Green Street Power Partners | Middletown, CT | ISO New England (ISNE) | 1.7 GWh | Nov 2019 | Dec 2024 | Solar |
| Corbin Russwin Phase 3 Berlin | Powerflex | Berlin, CT | ISO New England (ISNE) | 1.7 GWh | Mar 2018 | 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 |
| Sand Road | LSE Phoenix LLC | North Canaan, CT | ISO New England (ISNE) | 3.5 GWh | Oct 2021 | Dec 2024 | Solar |
| Platt Hill | LSE Pictor LLC | Winchester, CT | ISO New England (ISNE) | 2.4 GWh | Dec 2021 | Dec 2024 | Solar |
| Niagara Bottling - Bloomfield | Westbound Solar 3, LLC | Bloomfield, CT | ISO New England (ISNE) | 4.5 GWh | Oct 2022 | Dec 2024 | Solar |
| Gravel Pit Solar, LLC | Gravel Pit Solar, LLC | East Windsor, CT | ISO New England (ISNE) | 112.8 GWh | - | Sep 2025 | Solar |
| Burlington Solar 1 | DG Connecticut III, LLC | Burlington, CT | ISO New England (ISNE) | 5.6 GWh | Jan 2022 | Dec 2024 | Solar |
| Southington Solar One | DG Connecticut III, LLC | Southington, CT | ISO New England (ISNE) | 8.8 GWh | Jan 2022 | 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 |
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 |