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) | 835.0 MWh | Jul 2014 | Jun 2026 | Distillate Fuel Oil |
| Bridge Street 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 452.0 MWh | Jun 2010 | Dec 2025 | Distillate Fuel Oil |
| Fort Hill 1, 2, 3 & 4 | Connecticut Mun Elec Engy Coop | Uncasville, CT | ISO New England (ISNE) | 691.0 MWh | Jul 2010 | Jun 2026 | Distillate Fuel Oil |
| 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 |
| Jewett City 1 | Connecticut Mun Elec Engy Coop | Jewett City, CT | ISO New England (ISNE) | 139.0 MWh | Jan 2010 | Dec 2025 | Distillate Fuel Oil |
| Waterside Power, LLC | Waterside Power, LLC | Stamford, CT | ISO New England (ISNE) | 2.0 GWh | May 2003 | Dec 2025 | Distillate Fuel Oil |
| Water Treatment 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 463.0 MWh | Sep 2010 | Jun 2026 | Distillate Fuel Oil |
| Lebanon Pines 1 & 2 | Connecticut Mun Elec Engy Coop | Lebanon, CT | ISO New England (ISNE) | 374.0 MWh | Mar 2010 | Dec 2025 | Distillate Fuel Oil |
| LNG 1 & 2 | Connecticut Mun Elec Engy Coop | Norwich, CT | ISO New England (ISNE) | 382.0 MWh | Mar 2010 | Dec 2025 | Distillate Fuel Oil |
| Franklin Drive | Connecticut Jet Power LLC | Torrington, CT | ISO New England (ISNE) | 294.0 MWh | Oct 1968 | Dec 2025 | Kerosene |
| Torrington | Connecticut Jet Power LLC | Torrington, CT | ISO New England (ISNE) | 277.0 MWh | Oct 1967 | Dec 2025 | Kerosene |
| Branford | Connecticut Jet Power LLC | Branford, CT | ISO New England (ISNE) | 288.0 MWh | Oct 1967 | Dec 2025 | Kerosene |
| Cos Cob | Connecticut Jet Power LLC | Greenwich, CT | ISO New England (ISNE) | 1.6 GWh | Aug 1969 | Dec 2025 | Kerosene |
| 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% |
| New Milford Gas Recovery | WM Renewable Energy LLC | New Milford, CT | ISO New England (ISNE) | 4.0 GWh | Apr 2008 | Dec 2025 | Landfill Gas |
| Lake Road Generating Plant | Lake Road Generating Co LP | Dayville, CT | ISO New England (ISNE) | 5.9 TWh | Feb 2002 | Jun 2026 | Natural Gas |
| CPV Towantic Energy Center | CPV Towantic, LLC | Oxford, CT | ISO New England (ISNE) | 5.6 TWh | Apr 2018 | Jun 2026 | Natural Gas |
| FDX010.0 FedEx Fuel Cell | 2016 ESA Project Company, LLC | Middletown, CT | ISO New England (ISNE) | 8.1 GWh | Aug 2018 | Dec 2025 | Natural Gas |
| Wallingford Energy | Wallingford Energy LLC | Wallingford, CT | ISO New England (ISNE) | 107.0 GWh | Jul 2001 | Dec 2025 | Natural Gas |
| CCSU Fuel Cell Project | New Britain Renewable Energy, LLC | New Britain, CT | ISO New England (ISNE) | 7.0 GWh | Mar 2012 | Dec 2025 | Natural Gas |
| CCSU Co-Gen-STBY Gen | Central Connecticut State University | New Britain, CT | ISO New England (ISNE) | 9.8 MWh | Sep 1993 | Dec 2025 | Natural Gas |
| Pratt & Whitney | United Technologies | East Hartford, CT | ISO New England (ISNE) | 82.8 GWh | Dec 1991 | Jun 2026 | Natural Gas |
| Rand Whitney CHP Plant | Rand Whitney Containerboard L.P. | Montville, CT | ISO New England (ISNE) | 131.4 GWh | Mar 2005 | Jun 2026 | Natural Gas |
| Fairfield University CHP Plant | Fairfield University | Fairfield, CT | ISO New England (ISNE) | 23.3 GWh | Sep 2007 | Dec 2025 | Natural Gas |
| HSCo CHP | Cartier Energy, LLC | Hartford, CT | ISO New England (ISNE) | 27.7 GWh | Sep 2009 | Dec 2025 | Natural Gas |
| Foxwoods CoGen | Foxwoods Resort Casino | Mashantucket, CT | ISO New England (ISNE) | 10.8 GWh | May 2010 | Dec 2025 | Natural Gas |
| 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 |
| Cellu Tissue | Dunn Paper East Hartford, LLC | East Hartford, CT | ISO New England (ISNE) | 11.7 GWh | Apr 2009 | Jun 2026 | Natural Gas |
| Danbury Hospital Cogen Plant | Danbury Hospital | Danbury, CT | ISO New England (ISNE) | 21.6 GWh | Oct 2011 | Dec 2025 | Natural Gas |
| Wesleyan University Cogen 1 | Wesleyan University | Middletown, CT | ISO New England (ISNE) | 4.0 GWh | Jan 2009 | Dec 2025 | 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 |
| Trinity College Fuel Cell | 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 |
| UB Fuel Cell | UB Fuel Cell | Bridgeport, CT | ISO New England (ISNE) | 10.1 GWh | Mar 2015 | Dec 2025 | Natural Gas |
| 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 |
| Connecticut College | Bloom Energy | New London, CT | ISO New England (ISNE) | 10.1 GWh | Aug 2019 | Dec 2025 | Natural Gas |
| Stamford Health Tully Health Center | Stamford Health Tully Health Center | Stamford, CT | ISO New England (ISNE) | 5.1 GWh | Apr 2002 | Dec 2025 | Natural Gas |
| Medtronic - New Haven | Bloom Energy | North Haven, CT | ISO New England (ISNE) | 18.0 GWh | Sep 2020 | Dec 2025 | Natural Gas |
| South Windsor Fuel Cell | South Energy Investments LLC | South Windsor, CT | ISO New England (ISNE) | 37.4 GWh | Feb 2020 | Dec 2025 | Natural Gas |
| Medtronic - New Haven 2 | Bloom Energy | North Haven, CT | ISO New England (ISNE) | 16.9 GWh | Sep 2020 | Dec 2025 | Natural Gas |
| Yale New Haven - New London | Bloom Energy | New London, CT | ISO New England (ISNE) | 14.0 GWh | Aug 2022 | Dec 2025 | Natural Gas |
| UI RCP Woodbridge FC | United Illuminating Co | Woodbridge, CT | ISO New England (ISNE) | 16.7 GWh | Nov 2016 | Dec 2025 | Natural Gas |
| Milford Power Project | Milford Power Co LLC | Milford, CT | ISO New England (ISNE) | 3.3 TWh | Jan 2004 | Jun 2026 | Natural Gas |
| Derby Fuel Cell | Derby Fuel Cell LLC | Derby, CT | ISO New England (ISNE) | 110.3 GWh | Dec 2023 | Dec 2025 | Natural Gas |
| UDR Glastonbury Fuel Cell | UIL Distributed Resources, LLC | Glastonbury, CT | ISO New England (ISNE) | 15.8 GWh | Jan 2016 | Dec 2025 | Natural Gas |
| UI RCP New Haven Fuel Cell | United Illuminating Co | New Haven, CT | ISO New England (ISNE) | 21.2 GWh | Jul 2015 | Jun 2026 | Natural Gas |
| Pepperidge Farm Bloomfield | Pepperidge Farm, Inc.- Bloomfield | Bloomfield, CT | ISO New England (ISNE) | 15.5 GWh | Jul 2008 | Dec 2024 | Natural Gas |
| Subase Microgrid Project | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 29.6 GWh | Nov 2022 | Dec 2025 | Natural Gas |
| Hartford Hospital Cogeneration | Cartier Energy, LLC | Hartford, CT | ISO New England (ISNE) | 39.5 GWh | Jun 1988 | Dec 2024 | Natural Gas |
| Frito Lay Incorporated | Frito Lay Incorporated Dayville | Dayville, CT | ISO New England (ISNE) | 25.2 GWh | Feb 2009 | Jun 2026 | Natural Gas |
| Bridgeport Fuel Cell, LLC | Bridgeport Fuel Cell, LLC | Bridgeport, CT | ISO New England (ISNE) | 90.4 GWh | Nov 2013 | Dec 2025 | Natural Gas |
| Bradley Energy Center | Ameresco Select Inc | Windsor Locks, CT | ISO New England (ISNE) | 11.3 GWh | Oct 2002 | Dec 2025 | Natural Gas |
| Bridgeport Energy Project | Bridgeport Energy LLC | Bridgeport, CT | ISO New England (ISNE) | 2.7 TWh | May 1998 | Jun 2026 | Natural Gas |
| IKEA New Haven Rooftop PV & Fuel Cell | IKEA Property Inc | New Haven, CT | ISO New England (ISNE) | 2.7 GWh | Jun 2012 | Dec 2025 | Natural Gas : 71.5% Solar : 28.5% |
| Bridgeport Station | Generation Bridge II Connecticut, LLC | Bridgeport, CT | ISO New England (ISNE) | 3.2 TWh | Jul 1961 | Jun 2026 | Natural Gas : 84.6% Distillate Fuel Oil : 15.4% |
| UI RCP Bridgeport Seaside | United Illuminating Co | Bridgeport, CT | ISO New England (ISNE) | 18.2 GWh | Oct 2015 | Jun 2026 | Natural Gas : 85.2% Solar : 14.8% |
| Pfizer Groton Plant | Pfizer Inc | Groton, CT | ISO New England (ISNE) | 77.6 GWh | Dec 1947 | Jun 2026 | Natural Gas : 88.8% Distillate Fuel Oil : 11.2% |
| Algonquin Windsor Locks | Ahlstrom Power Windsor Locks LLC | Windsor Locks, CT | ISO New England (ISNE) | 144.9 GWh | Dec 1989 | Jun 2026 | Natural Gas : 92.1% Distillate Fuel Oil : 7.9% |
| UCONN Cogen Facility | University of Connecticut | Storrs, CT | ISO New England (ISNE) | 111.4 GWh | Feb 2006 | Jun 2026 | Natural Gas : 95.1% Distillate Fuel Oil : 4.9% |
| Kleen Energy Systems | Kleen Energy Systems, LLC | Middletown, CT | ISO New England (ISNE) | 3.8 TWh | Jun 2011 | Jun 2026 | Natural Gas : 97.9% Distillate Fuel Oil : 2.1% |
| Waterbury Generation | Engie North America | Waterbury, CT | ISO New England (ISNE) | 55.0 GWh | May 2009 | Dec 2025 | Natural Gas : 99.1% Kerosene : 0.9% |
| Sikorsky Aircraft CHP | Sikorsky Aircraft Corporation | Stratford, CT | ISO New England (ISNE) | 65.3 GWh | May 2010 | Dec 2025 | Natural Gas : 99.9% |
| Covanta Southeastern Connecticut Company | Covanta Southeastern Connecticut Company | Preston, CT | ISO New England (ISNE) | 108.3 GWh | Nov 1991 | Jun 2026 | Non-biogenic Municipal Solid Waste : 53.9% Biogenic Municipal Solid Waste : 44.1% Distillate Fuel Oil : 2.0% |
| Wheelabrator Bridgeport | Wheelabrator Environmental Systems | Bridgeport, CT | ISO New England (ISNE) | 431.2 GWh | Jun 1988 | Jun 2026 | 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) | 108.9 GWh | Nov 1987 | Jun 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator Lisbon | Wheelabrator Environmental Systems | Lisbon, CT | ISO New England (ISNE) | 101.1 GWh | Sep 1995 | Jun 2026 | 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) | 16.9 TWh | Nov 1975 | Jun 2026 | Nuclear |
| New Haven Steam | Generation Bridge II Connecticut, LLC | New Haven, CT | ISO New England (ISNE) | 164.0 GWh | Jun 1975 | Jun 2026 | Residual Fuel Oil : 44.2% Natural Gas : 41.5% Distillate Fuel Oil : 12.6% Kerosene : 1.7% |
| 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% |
| Montville Station | Montville Power LLC | Uncasville, CT | ISO New England (ISNE) | 133.2 GWh | Dec 1953 | Dec 2025 | Residual Fuel Oil : 74.2% Natural Gas : 24.9% Distillate Fuel Oil : 0.9% |
| Town of Rocky Hill PV CSG | Tesla Inc. | Rocky Hill, CT | ISO New England (ISNE) | 5.0 GWh | Feb 2018 | Dec 2025 | Solar |
| SR Litchfield | SR Litchfield, LLC | Litchfield, CT | ISO New England (ISNE) | 26.4 GWh | Jan 2025 | Dec 2025 | Solar |
| Blair Solar | Ecos Energy LLC | Somers, CT | ISO New England (ISNE) | 1.6 GWh | Dec 2020 | Dec 2025 | Solar |
| Madison Solar (CT) | Ecos Energy LLC | Somers, CT | ISO New England (ISNE) | 1.6 GWh | Dec 2020 | Dec 2025 | Solar |
| SR North Stonington | SR North Stonington, LLC | North Stonington, CT | ISO New England (ISNE) | 15.0 GWh | Feb 2024 | Dec 2025 | Solar |
| Barrow Solar | Ecos Energy LLC | Somers, CT | ISO New England (ISNE) | 3.1 GWh | May 2021 | Dec 2025 | Solar |
| Few Solar | Ecos Energy LLC | Somers, CT | ISO New England (ISNE) | 1.6 GWh | Dec 2020 | Dec 2025 | Solar |
| McHenry Solar | Ecos Energy LLC | Hampton, CT | ISO New England (ISNE) | 1.6 GWh | Sep 2021 | Dec 2025 | Solar |
| East Windsor Solar One | DG Connecticut III, LLC | East Windsor, CT | ISO New England (ISNE) | 6.5 GWh | Nov 2021 | Sep 2025 | Solar |
| Clinton Solar | Ecos Energy LLC | Griswold, CT | ISO New England (ISNE) | 1.7 GWh | Apr 2021 | Dec 2025 | Solar |
| East Windsor Solar Two | East Windsor Solar Two, LLC | East Windsor, CT | ISO New England (ISNE) | 749.0 MWh | Aug 2025 | Dec 2025 | Solar |
| Plainfield Solar 1 | Ecos Energy LLC | Plainfield, CT | ISO New England (ISNE) | 1.5 GWh | Dec 2019 | Dec 2025 | Solar |
| North Haven Solar One | North Haven Solar One, LLC | North Haven, CT | ISO New England (ISNE) | 2.8 GWh | Feb 2024 | Dec 2025 | Solar |
| Quinebaug Solar | Quinebaug Solar, LLC | Canterbury, CT | ISO New England (ISNE) | 75.4 GWh | Nov 2021 | Jun 2026 | Solar |
| Enfield Solar One | Enfield Solar One, LLC | Hartford, CT | ISO New England (ISNE) | 8.3 GWh | Mar 2024 | Dec 2025 | Solar |
| FedEx Middletown | VCP Realty, LLC | Middletown, CT | ISO New England (ISNE) | 1.9 GWh | Oct 2024 | Dec 2025 | Solar |
| Watertown Solar One, LLC | DG Connecticut III, LLC | Watertown, CT | ISO New England (ISNE) | 2.9 GWh | May 2021 | Dec 2025 | Solar |
| Bristol Solar One, LLC | DG Connecticut III, LLC | Bristol, CT | ISO New England (ISNE) | 4.9 GWh | Apr 2021 | Dec 2025 | Solar |
| Wallingford Solar | Wallingford Renewable Energy, LLC | Wallingford, CT | ISO New England (ISNE) | 15.4 GWh | Aug 2021 | Dec 2025 | Solar |
| Torrington Solar One, LLC | DG Connecticut III, LLC | Torrington, CT | ISO New England (ISNE) | 3.1 GWh | Feb 2021 | Dec 2025 | Solar |
| Raffia Road Solar Project | NJR Clean Energy Ventures Corporation | Enfield, CT | ISO New England (ISNE) | 7.0 GWh | Nov 2024 | Dec 2025 | Solar |
| Bilton Solar | Ecos Energy LLC | Somers, CT | ISO New England (ISNE) | 2.5 GWh | Aug 2023 | Dec 2025 | Solar |
| CTGB Maloney and Webster | TotalEnergies Renewables USA LLC | Cheshire, CT | ISO New England (ISNE) | 3.2 GWh | Jun 2025 | Dec 2025 | Solar |
| CTGB Osborn | TotalEnergies Renewables USA LLC | Somers, CT | ISO New England (ISNE) | 2.7 GWh | Nov 2024 | Dec 2025 | Solar |
| Glastonbury Solar One | NJR Clean Energy Ventures Corporation | Glastonbury, CT | ISO New England (ISNE) | 821.0 MWh | Aug 2025 | Dec 2025 | Solar |
| East Windsor | NJR Clean Energy Ventures Corporation | East Windsor, CT | ISO New England (ISNE) | 869.0 MWh | Aug 2025 | Dec 2025 | 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 |
| Benz Solar 2 | Ecos Energy LLC | Ansonia, CT | ISO New England (ISNE) | 1.3 GWh | Feb 2025 | Dec 2025 | Solar |
| Benz Solar 1 | Ecos Energy LLC | Ansonia, CT | ISO New England (ISNE) | 1.3 GWh | Feb 2025 | Dec 2025 | Solar |
Browse Power Plants By Connecticut Counties
Figures are based on June 2026 generation numbers.| County | State Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| Southeastern Connecticut Planning Region, CT | # 1 | 52 | 17.8 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 | 6.0 TWh |
| Lower Connecticut River Valley Planning Region, CT | # 5 | 16 | 3.9 TWh |
| County | State Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| South Central Connecticut Planning Region, CT | # 6 | 23 | 3.6 TWh |
| Capitol Planning Region, CT | # 7 | 61 | 865.7 GWh |
| Western Connecticut Planning Region, CT | # 8 | 15 | 246.1 GWh |
| Northwest Hills Planning Region, CT | # 9 | 15 | 98.3 GWh |