Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Derby Fuel Cell | Derby Fuel Cell LLC | Derby, CT | ISO New England (ISNE) | 8.2 GWh | - | Dec 2023 | Natural Gas |
| Gravel Pit Solar, LLC | Gravel Pit Solar, LLC | East Windsor, CT | ISO New England (ISNE) | 7.0 GWh | - | Mar 2025 | Solar |
| Bulls Bridge | FirstLight Power Resources Services LLC | New Milford, CT | ISO New England (ISNE) | 41.8 GWh | Dec 1902 | Dec 2023 | Water |
| Taftville | FirstLight Power Resources Services LLC | Taftville, CT | ISO New England (ISNE) | 4.7 GWh | Dec 1905 | Dec 2023 | Water |
| Falls Village | FirstLight Power Resources Services LLC | Falls Village, CT | ISO New England (ISNE) | 52.1 GWh | Dec 1913 | Dec 2023 | Water |
| Stevenson | FirstLight Power Resources Services LLC | Monroe, CT | ISO New England (ISNE) | 111.2 GWh | Dec 1918 | Dec 2023 | Water |
| Tunnel | FirstLight Power Resources Services LLC | Preston, CT | ISO New England (ISNE) | 11.9 GWh | Dec 1918 | Dec 2023 | Water : 98.2% Jet Fuel : 1.8% |
| Rainbow (CT) | Farmington River Power Company | Windsor, CT | ISO New England (ISNE) | 22.3 GWh | Nov 1925 | Mar 2025 | Water |
| Scotland Dam | FirstLight Power Resources Services LLC | Windham, CT | ISO New England (ISNE) | 9.6 GWh | Dec 1936 | Dec 2023 | Water |
| Pfizer Groton Plant | Pfizer Inc | Groton, CT | ISO New England (ISNE) | 80.2 GWh | Dec 1947 | Mar 2025 | Natural Gas : 94.7% Distillate Fuel Oil : 5.3% |
| Montville Station | NRG Montville Operations Inc | Uncasville, CT | ISO New England (ISNE) | 36.2 GWh | Dec 1953 | Dec 2023 | Residual Fuel Oil : 65.3% Natural Gas : 33.4% Distillate Fuel Oil : 1.3% |
| Shepaug | FirstLight Power Resources Services LLC | Southbury, CT | ISO New England (ISNE) | 163.1 GWh | Dec 1954 | Dec 2023 | Water |
| Middletown | Middletown Power LLC | Middletown, CT | ISO New England (ISNE) | 169.8 GWh | Sep 1958 | Dec 2023 | Natural Gas : 79.3% Residual Fuel Oil : 20.7% |
| Bridgeport Station | Generation Bridge II Connecticut, LLC | Bridgeport, CT | ISO New England (ISNE) | 3.5 TWh | Jul 1961 | Mar 2025 | Natural Gas : 98.6% Distillate Fuel Oil : 1.4% |
| Tenth Street | City of Norwich - (CT) | Norwich, CT | ISO New England (ISNE) | 3.5 GWh | Apr 1967 | Dec 2023 | Water |
| Branford | Connecticut Jet Power LLC | Branford, CT | ISO New England (ISNE) | 68.0 MWh | Oct 1967 | Dec 2023 | Kerosene |
| Torrington Terminal | Connecticut Jet Power LLC | Torrington, CT | ISO New England (ISNE) | 67.0 MWh | Oct 1967 | Dec 2023 | Kerosene |
| Franklin Drive | Connecticut Jet Power LLC | Torrington, CT | ISO New England (ISNE) | 100.0 MWh | Oct 1968 | Dec 2023 | Kerosene |
| Cos Cob | Connecticut Jet Power LLC | Greenwich, CT | ISO New England (ISNE) | 1.3 GWh | Aug 1969 | Dec 2023 | Kerosene |
| New Haven Harbor | Generation Bridge II Connecticut, LLC | New Haven, CT | ISO New England (ISNE) | 44.9 GWh | Jun 1975 | Feb 2025 | Natural Gas : 53.7% Residual Fuel Oil : 33.6% Kerosene : 10.8% Distillate Fuel Oil : 1.9% |
| Millstone | Dominion Energy Nuclear Conn Inc | Waterford, CT | ISO New England (ISNE) | 17.1 TWh | Nov 1975 | Mar 2025 | Nuclear |
| Devon Station | Devon Power LLC | Milford, CT | ISO New England (ISNE) | 123.0 MWh | Dec 1984 | Dec 2023 | Kerosene : 89.2% Natural Gas : 10.8% |
| Goodwin Hydroelectric | Metropolitan Dist of Hartford | W. Hartland, CT | ISO New England (ISNE) | 12.9 GWh | Mar 1986 | Dec 2023 | Water |
| Covanta Bristol Energy | Covanta Bristol Inc | Bristol, CT | ISO New England (ISNE) | 108.5 GWh | Nov 1987 | Mar 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) | 460.4 GWh | Jun 1988 | Mar 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Hartford Hospital Cogeneration | Cartier Energy, LLC | Hartford, CT | ISO New England (ISNE) | 43.8 GWh | Jun 1988 | Dec 2023 | Natural Gas : 99.8% |
| Derby Hydro | McCallum Enterprises I LP | Shelton, CT | ISO New England (ISNE) | 9.3 GWh | Dec 1988 | Dec 2023 | Water |
| Algonquin Windsor Locks | Algonquin Windsor Locks LLC | Windsor Locks, CT | ISO New England (ISNE) | 120.5 GWh | Dec 1989 | Mar 2025 | Natural Gas : 99.9% |
| Quinebaug Lower Project | Quinebaug Associates LLC | Brooklyn, CT | ISO New England (ISNE) | 10.1 GWh | Mar 1990 | Dec 2023 | Water |
| Covanta Southeastern Connecticut Company | Covanta Southeastern Connecticut Company | Preston, CT | ISO New England (ISNE) | 112.2 GWh | Nov 1991 | Mar 2025 | Non-biogenic Municipal Solid Waste : 54.2% Biogenic Municipal Solid Waste : 44.4% Distillate Fuel Oil : 1.4% |
| Pratt & Whitney | United Technologies | East Hartford, CT | ISO New England (ISNE) | 91.7 GWh | Dec 1991 | Mar 2025 | Natural Gas |
| CCSU Co-Gen-STBY Gen | Central Connecticut State University | New Britain, CT | ISO New England (ISNE) | 88.2 MWh | Sep 1993 | Dec 2023 | Natural Gas |
| Wheelabrator Lisbon | Wheelabrator Environmental Systems | Lisbon, CT | ISO New England (ISNE) | 98.6 GWh | Sep 1995 | Mar 2025 | 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) | 2.8 TWh | May 1998 | Mar 2025 | Natural Gas |
| Wallingford Energy | Wallingford Energy LLC | Wallingford, CT | ISO New England (ISNE) | 161.3 GWh | Jul 2001 | Dec 2023 | Natural Gas |
| Lake Road Generating Plant | Lake Road Generating Co LP | Dayville, CT | ISO New England (ISNE) | 5.8 TWh | Feb 2002 | Mar 2025 | Natural Gas |
| Bradley Energy Center | Ameresco Select Inc | Windsor Locks, CT | ISO New England (ISNE) | 12.9 GWh | Oct 2002 | Dec 2023 | Natural Gas |
| Waterside Power, LLC | Waterside Power, LLC | Stamford, CT | ISO New England (ISNE) | 1.8 GWh | May 2003 | Dec 2023 | Distillate Fuel Oil |
| Milford Power Project | Milford Power Co LLC | Milford, CT | ISO New England (ISNE) | 3.8 TWh | Jan 2004 | Mar 2025 | Natural Gas |
| Rand Whitney CHP Plant | Rand Whitney Containerboard L.P. | Montville, CT | ISO New England (ISNE) | 132.5 GWh | Mar 2005 | Mar 2025 | Natural Gas |
| UCONN Cogen Facility | University of Connecticut | Storrs, CT | ISO New England (ISNE) | 123.5 GWh | Feb 2006 | Mar 2025 | Natural Gas : 98.9% Distillate Fuel Oil : 1.1% |
| Norwich WWTP | City of Norwich - (CT) | Norwich, CT | ISO New England (ISNE) | 1.0 MWh | Apr 2006 | Mar 2024 | Distillate Fuel Oil |
| Fairfield University CHP Plant | Fairfield University | Fairfield, CT | ISO New England (ISNE) | 25.3 GWh | Sep 2007 | Dec 2023 | Natural Gas |
| Kimberly Clark-Unit 1,2,3 | Kimberly-Clark Corporation | New Milford, CT | ISO New England (ISNE) | 217.4 GWh | Mar 2008 | Dec 2023 | Natural Gas |
| New Milford Gas Recovery | WM Renewable Energy LLC | New Milford, CT | ISO New England (ISNE) | 5.4 GWh | Apr 2008 | Dec 2023 | Landfill Gas |
| Pepperidge Farm Bloomfield | Pepperidge Farm, Inc.- Bloomfield | Bloomfield, CT | ISO New England (ISNE) | 16.5 GWh | Jul 2008 | Dec 2023 | Natural Gas |
| Wesleyan University Cogen 1 | Wesleyan University | Middletown, CT | ISO New England (ISNE) | 10.5 GWh | Jan 2009 | Dec 2023 | Natural Gas |
| Frito Lay Incorporated | Frito Lay Incorporated Dayville | Dayville, CT | ISO New England (ISNE) | 24.0 GWh | Feb 2009 | Mar 2025 | Natural Gas |
| Cellu Tissue | Dunn Paper East Hartford, LLC | East Hartford, CT | ISO New England (ISNE) | 11.8 GWh | Apr 2009 | Mar 2025 | Natural Gas |
| Waterbury Generation | Engie North America | Waterbury, CT | ISO New England (ISNE) | 40.1 GWh | May 2009 | Dec 2023 | Natural Gas : 99.7% |
| HSCo CHP | Cartier Energy, LLC | Hartford, CT | ISO New England (ISNE) | 26.6 GWh | Sep 2009 | Dec 2023 | Natural Gas |
| Jewett City 1 | Connecticut Mun Elec Engy Coop | Jewett City, CT | ISO New England (ISNE) | 198.0 MWh | Jan 2010 | Dec 2023 | Distillate Fuel Oil |
| LNG 1 & 2 | Connecticut Mun Elec Engy Coop | Norwich, CT | ISO New England (ISNE) | 573.0 MWh | Mar 2010 | Dec 2023 | Distillate Fuel Oil |
| Lebanon Pines 1 & 2 | Connecticut Mun Elec Engy Coop | Lebanon, CT | ISO New England (ISNE) | 577.0 MWh | Mar 2010 | Dec 2023 | Distillate Fuel Oil |
| GenConn Devon LLC | GenConn Devon LLC | Milford, CT | ISO New England (ISNE) | 2.3 GWh | May 2010 | Dec 2023 | Kerosene : 96.0% Natural Gas : 4.0% |
| Foxwoods CoGen | Foxwoods Resort Casino | Mashantucket, CT | ISO New England (ISNE) | 10.8 GWh | May 2010 | Dec 2023 | Natural Gas |
| Sikorsky Aircraft CHP | Sikorsky Aircraft Corporation | Stratford, CT | ISO New England (ISNE) | 64.3 GWh | May 2010 | Dec 2023 | Natural Gas : 99.9% |
| Bridge Street 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 562.0 MWh | Jun 2010 | Dec 2023 | Distillate Fuel Oil |
| Gary Court 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 466.0 MWh | Jun 2010 | Dec 2023 | Distillate Fuel Oil |
| Fort Hill 1, 2, 3 & 4 | Connecticut Mun Elec Engy Coop | Uncasville, CT | ISO New England (ISNE) | 519.0 MWh | Jul 2010 | Mar 2025 | Distillate Fuel Oil |
| Water Treatment 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 303.0 MWh | Sep 2010 | Mar 2025 | Distillate Fuel Oil |
| GenConn Middletown LLC | GenConn Middletown LLC | Middletown, CT | ISO New England (ISNE) | 3.5 GWh | May 2011 | Dec 2023 | Kerosene : 83.6% Natural Gas : 16.4% |
| Kleen Energy Systems Project | Kleen Energy Systems, LLC | Middletown, CT | ISO New England (ISNE) | 3.0 TWh | Jun 2011 | Mar 2025 | Natural Gas : 99.2% Distillate Fuel Oil : 0.8% |
| Danbury Hospital Cogen Plant | Danbury Hospital | Danbury, CT | ISO New England (ISNE) | 26.3 GWh | Oct 2011 | Dec 2023 | Natural Gas |
| CCSU Fuel Cell Project | New Britain Renewable Energy, LLC | New Britain, CT | ISO New England (ISNE) | 10.2 GWh | Mar 2012 | Dec 2023 | Natural Gas |
| IKEA New Haven Rooftop PV & Fuel Cell | IKEA Property Inc | New Haven, CT | ISO New England (ISNE) | 1.8 GWh | Jun 2012 | Dec 2023 | Natural Gas : 67.0% Solar : 33.0% |
| Plainfield Renewable Energy LLC | Plainfield Renewable Energy, LLC | Plainfield, CT | ISO New England (ISNE) | 233.8 GWh | Nov 2013 | Dec 2023 | Wood/Wood Waste Solids : 99.6% |
| Bridgeport Fuel Cell, LLC | Bridgeport Fuel Cell, LLC | Bridgeport, CT | ISO New England (ISNE) | 105.1 GWh | Nov 2013 | Dec 2023 | Natural Gas |
| Somers Solar Center, LLC | Onward Energy | Somers, CT | ISO New England (ISNE) | 7.9 GWh | Nov 2013 | Dec 2023 | Solar |
| Antares-GRE 314 East Lyme LLC | MN8 Energy LLC | East Lyme, CT | ISO New England (ISNE) | 3.7 GWh | May 2014 | Mar 2025 | Solar |
| Hartford Landfill Solar EGF | Materials Innovation Recycling Authority | Hartford, CT | ISO New England (ISNE) | 1.4 GWh | May 2014 | Dec 2023 | Solar |
| Backus Microgrid Project | Connecticut Mun Elec Engy Coop | Norwich, CT | ISO New England (ISNE) | 913.0 MWh | Jul 2014 | Mar 2025 | Distillate Fuel Oil |
| Advance Stores Company, Inc | Tesla Inc. | Enfield, CT | ISO New England (ISNE) | 1.2 GWh | Oct 2014 | Dec 2023 | Solar |
| UB Fuel Cell | UB Fuel Cell | Bridgeport, CT | ISO New England (ISNE) | 10.5 GWh | Mar 2015 | Dec 2023 | Natural Gas |
| UI RCP New Haven Fuel Cell | United Illuminating Co | New Haven, CT | ISO New England (ISNE) | 14.4 GWh | Jul 2015 | Mar 2025 | Natural Gas |
| UI RCP Bridgeport Seaside | United Illuminating Co | Bridgeport, CT | ISO New England (ISNE) | 19.9 GWh | Oct 2015 | Mar 2025 | Natural Gas : 88.4% Solar : 11.6% |
| Wind Colebrook South | Wind Colebrook South | Colebrook, CT | ISO New England (ISNE) | 10.7 GWh | Oct 2015 | Mar 2025 | Wind |
| UDR Glastonbury Fuel Cell | UIL Distributed Resources, LLC | Glastonbury, CT | ISO New England (ISNE) | 21.1 GWh | Jan 2016 | Dec 2023 | Natural Gas |
| Stafford MS Ground Mount Community Solar | Town of Stafford - (CT) | Stafford, CT | ISO New England (ISNE) | 3.2 GWh | Jun 2016 | Dec 2023 | Solar |
| Pfizer Groton Fuel Cell | Groton Fuel Cell 1 LLC | Groton, CT | ISO New England (ISNE) | 42.1 GWh | Sep 2016 | Dec 2023 | Natural Gas |
| CMEEC - Bozrah | Tesla Inc. | Bozrah, CT | ISO New England (ISNE) | 3.1 GWh | Nov 2016 | Dec 2023 | Solar |
| Conn Mun Electric Energy Coop | Tesla Inc. | Norwich, CT | ISO New England (ISNE) | 1.3 GWh | Nov 2016 | Dec 2023 | Solar |
| UI RCP Woodbridge FC | United Illuminating Co | Woodbridge, CT | ISO New England (ISNE) | 16.5 GWh | Nov 2016 | Dec 2023 | Natural Gas |
| CMEEC - Norwich Stott St Solar Hybrid | Tesla Inc. | Norwich, CT | ISO New England (ISNE) | 2.4 GWh | Nov 2016 | Dec 2023 | Solar |
| Canis Major Solar Farm | LSE Canis Major LLC | Suffield, CT | ISO New England (ISNE) | 3.5 GWh | Nov 2016 | Dec 2023 | Solar |
| Canis Minor Solar Farm | LSE Canis Minor LLC | Barkhamsted, CT | ISO New England (ISNE) | 1.7 GWh | Nov 2016 | Dec 2023 | Solar |
| CMEEC - Rogers Rd Solar | Tesla Inc. | Norwich, CT | ISO New England (ISNE) | 1.6 GWh | Jan 2017 | Dec 2023 | Solar |
| CMEEC - Navy NE Trident | Tesla Inc. | Groton, CT | ISO New England (ISNE) | 1.4 GWh | May 2017 | Dec 2023 | Solar |
| CMEEC - Polaris Park Solar Hybrid | Tesla Inc. | Gordon, CT | ISO New England (ISNE) | 4.9 GWh | Jul 2017 | Dec 2023 | Solar |
| Barrett Farm Solar - Phase I | Onyx Asset Services Group | Thompson, CT | ISO New England (ISNE) | 2.9 GWh | Sep 2017 | Dec 2023 | Solar |
| Norcap South | LSE Coma Berenices LLC | East Windsor, CT | ISO New England (ISNE) | 3.4 GWh | Nov 2017 | Dec 2023 | Solar |
| Norcap North | LSE Canes Venatici LLC | East Windsor, CT | ISO New England (ISNE) | 3.4 GWh | Nov 2017 | Dec 2023 | Solar |
| Jefferson Solar | Ecos Energy LLC | Lebanon, CT | ISO New England (ISNE) | 1.5 GWh | Dec 2017 | Dec 2023 | Solar |
| ALDI DC 2 | EnterSolar | South Windsor, CT | ISO New England (ISNE) | 1.7 GWh | Jan 2018 | Dec 2023 | Solar |
| Fusion Solar Center LLC | Fusion Solar Centre, L.L.C | Baltic, CT | ISO New England (ISNE) | 40.0 GWh | Feb 2018 | Mar 2025 | Solar |
| Town of Rocky Hill PV CSG | Tesla Inc. | Rocky Hill, CT | ISO New England (ISNE) | 4.6 GWh | Feb 2018 | Dec 2023 | Solar |
| Franklin Solar | Ecos Energy LLC | Lebanon, CT | ISO New England (ISNE) | 1.5 GWh | Feb 2018 | Dec 2023 | Solar |
| Wilson Solar | Ecos Energy LLC | Lebanon, CT | ISO New England (ISNE) | 1.5 GWh | Feb 2018 | Dec 2023 | Solar |
| Hamilton Solar | Ecos Energy LLC | Lebanon, CT | ISO New England (ISNE) | 1.5 GWh | Feb 2018 | Dec 2023 | Solar |
| Adams Solar | Ecos Energy LLC | Lebanon, CT | ISO New England (ISNE) | 1.5 GWh | Feb 2018 | Dec 2023 | Solar |
Browse Power Plants By Connecticut Counties
Figures are based on March 2025 generation numbers.| County | State Rank | Active Plants | Mar 2025 Generation |
|---|---|---|---|
| Southeastern Connecticut Planning Region, CT | # 1 | 50 | 18.0 TWh |
| Greater Bridgeport Planning Region, CT | # 2 | 10 | 7.1 TWh |
| Northeastern Connecticut Planning Region, CT | # 3 | 17 | 6.2 TWh |
| Naugatuck Valley Planning Region, CT | # 4 | 13 | 5.9 TWh |
| South Central Connecticut Planning Region, CT | # 5 | 23 | 4.1 TWh |
| County | State Rank | Active Plants | Mar 2025 Generation |
|---|---|---|---|
| Lower Connecticut River Valley Planning Region, CT | # 6 | 15 | 3.3 TWh |
| Capitol Planning Region, CT | # 7 | 50 | 659.5 GWh |
| Western Connecticut Planning Region, CT | # 8 | 14 | 293.8 GWh |
| Northwest Hills Planning Region, CT | # 9 | 15 | 92.9 GWh |