Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Pfizer Groton Fuel Cell | Groton Fuel Cell 1 LLC | Groton, CT | ISO New England (ISNE) | 42.3 GWh | Sep 2016 | Dec 2022 | Natural Gas |
| Pfizer Groton Plant | Pfizer Inc | Groton, CT | ISO New England (ISNE) | 76.5 GWh | Dec 1947 | Mar 2024 | Natural Gas : 96.4% Distillate Fuel Oil : 3.6% |
| Plainfield Renewable Energy LLC | Plainfield Renewable Energy, LLC | Plainfield, CT | ISO New England (ISNE) | 288.3 GWh | Nov 2013 | May 2022 | Wood/Wood Waste Solids : 99.6% |
| Plainfield Solar 1 | Ecos Energy LLC | Plainfield, CT | ISO New England (ISNE) | 1.5 GWh | Dec 2019 | Dec 2022 | Solar |
| Plainfield Solar 2 | Ecos Energy LLC | Plainfield, CT | ISO New England (ISNE) | 1.6 GWh | Mar 2020 | Dec 2022 | Solar |
| Pratt & Whitney | United Technologies | East Hartford, CT | ISO New England (ISNE) | 139.5 GWh | Dec 1991 | Mar 2024 | Natural Gas : 99.8% |
| Quinebaug Lower Project | Quinebaug Associates LLC | Brooklyn, CT | ISO New England (ISNE) | 5.8 GWh | Mar 1990 | Dec 2022 | Water |
| Quinebaug Solar | Quinebaug Solar, LLC | Canterbury, CT | ISO New England (ISNE) | 83.8 GWh | Nov 2021 | Mar 2024 | Solar |
| Rainbow (CT) | Farmington River Power Company | Windsor, CT | ISO New England (ISNE) | 40.9 GWh | Nov 1925 | Mar 2024 | Water |
| Rand Whitney CHP Plant | Rand Whitney Containerboard L.P. | Montville, CT | ISO New England (ISNE) | 138.2 GWh | Mar 2005 | Mar 2024 | Natural Gas |
| Rocky River (CT) | FirstLight Power Resources Services LLC | New Milford, CT | ISO New England (ISNE) | 2.4 GWh | Dec 1927 | Mar 2024 | Water |
| Scotland Dam | FirstLight Power Resources Services LLC | Windham, CT | ISO New England (ISNE) | 6.3 GWh | Dec 1936 | Dec 2022 | Water |
| Shepaug | FirstLight Power Resources Services LLC | Southbury, CT | ISO New England (ISNE) | 114.4 GWh | Dec 1954 | Dec 2022 | Water |
| Sherman Solar | Ecos Energy LLC | Griswold, CT | ISO New England (ISNE) | 1.6 GWh | Nov 2019 | Dec 2022 | Solar |
| Sikorsky Aircraft CHP | Sikorsky Aircraft Corporation | Stratford, CT | ISO New England (ISNE) | 77.0 GWh | May 2010 | Dec 2022 | Natural Gas : 99.6% |
| Somers Solar Center, LLC | Onward Energy | Somers, CT | ISO New England (ISNE) | 7.5 GWh | Nov 2013 | Dec 2022 | Solar |
| South Meadow | NAES Corp | Hartford, CT | ISO New England (ISNE) | 1.5 GWh | Jul 1970 | Dec 2022 | Kerosene |
| South Windsor Fuel Cell | South Energy Investments LLC | South Windsor, CT | ISO New England (ISNE) | 40.7 GWh | Feb 2020 | Dec 2022 | Natural Gas |
| Southington Solar One | DG Connecticut III, LLC | Southington, CT | ISO New England (ISNE) | 7.9 GWh | Jan 2022 | Dec 2022 | Solar |
| Stafford MS Ground Mount Community Solar | Town of Stafford, CT | Stafford, CT | ISO New England (ISNE) | 3.5 GWh | Jun 2016 | Dec 2022 | Solar |
| Stamford Health | Stamford Health Systems, Inc. | Stamford, CT | ISO New England (ISNE) | 88.6 MWh | Dec 1983 | Dec 2022 | Distillate Fuel Oil |
| Stevenson | FirstLight Power Resources Services LLC | Monroe, CT | ISO New England (ISNE) | 73.1 GWh | Dec 1918 | Dec 2022 | Water |
| Subase Microgrid Project | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 19.1 GWh | Nov 2022 | Dec 2022 | Natural Gas |
| Sydney Solar | Ecos Energy LLC | Hampton, CT | ISO New England (ISNE) | 3.0 GWh | May 2020 | Dec 2022 | Solar |
| Taftville | FirstLight Power Resources Services LLC | Taftville, CT | ISO New England (ISNE) | 3.8 GWh | Dec 1905 | Dec 2022 | Water |
| Tenth Street | City of Norwich - (CT) | Norwich, CT | ISO New England (ISNE) | 4.2 GWh | Apr 1967 | Dec 2022 | Water |
| Ticket Network South Windsor | EnterSolar | South Windsor, CT | ISO New England (ISNE) | 1.7 GWh | Apr 2018 | Dec 2022 | Solar |
| Torrington Solar One, LLC | DG Connecticut III, LLC | Torrington, CT | ISO New England (ISNE) | 3.8 GWh | Feb 2021 | Dec 2022 | Solar |
| Torrington Terminal | Connecticut Jet Power LLC | Torrington, CT | ISO New England (ISNE) | 191.2 MWh | Oct 1967 | Dec 2022 | Kerosene |
| Town of Branford | Tesla Inc. | Branford, CT | ISO New England (ISNE) | 1.7 GWh | May 2018 | Dec 2022 | Solar |
| Town of Rocky Hill PV CSG | Tesla Inc. | Rocky Hill, CT | ISO New England (ISNE) | 5.3 GWh | Feb 2018 | Dec 2022 | Solar |
| Trinity College Fuel Cell | AEP Onsite Partners, LLC | Hartford, CT | ISO New England (ISNE) | 10.1 GWh | Jul 2018 | Dec 2022 | Natural Gas |
| Tunnel | FirstLight Power Resources Services LLC | Preston, CT | ISO New England (ISNE) | 8.4 GWh | Dec 1918 | Dec 2022 | Water : 98.1% Jet Fuel : 1.9% |
| UB Fuel Cell | UB Fuel Cell | Bridgeport, CT | ISO New England (ISNE) | 11.7 GWh | Mar 2015 | Dec 2022 | Natural Gas |
| UCONN Cogen Facility | University of Connecticut | Storrs, CT | ISO New England (ISNE) | 132.6 GWh | Feb 2006 | Mar 2024 | Natural Gas : 99.7% |
| UDR Glastonbury Fuel Cell | UIL Distributed Resources, LLC | Glastonbury, CT | ISO New England (ISNE) | 25.6 GWh | Jan 2016 | Dec 2022 | Natural Gas |
| UI RCP Bridgeport Seaside | United Illuminating Co | Bridgeport, CT | ISO New England (ISNE) | 22.4 GWh | Oct 2015 | Mar 2024 | Natural Gas : 98.3% Solar : 1.7% |
| UI RCP New Haven Fuel Cell | United Illuminating Co | New Haven, CT | ISO New England (ISNE) | 21.8 GWh | Jul 2015 | Mar 2024 | Natural Gas |
| UI RCP Woodbridge FC | United Illuminating Co | Woodbridge, CT | ISO New England (ISNE) | 15.2 GWh | Nov 2016 | Dec 2022 | Natural Gas |
| Wallingford Energy | Wallingford Energy LLC | Wallingford, CT | ISO New England (ISNE) | 80.0 GWh | Jul 2001 | Dec 2022 | Natural Gas |
| Wallingford Solar | Wallingford Renewable Energy, LLC | Wallingford, CT | ISO New England (ISNE) | 23.5 GWh | Aug 2021 | Dec 2022 | Solar |
| Water Treatment 1 & 2 | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 553.0 MWh | Sep 2010 | Mar 2024 | Distillate Fuel Oil |
| Waterbury Generation | Engie North America | Waterbury, CT | ISO New England (ISNE) | 43.7 GWh | May 2009 | Dec 2022 | Natural Gas : 99.7% |
| Waterside Power, LLC | Waterside Power, LLC | Stamford, CT | ISO New England (ISNE) | 1.8 GWh | May 2003 | Dec 2022 | Distillate Fuel Oil |
| Watertown Solar One, LLC | DG Connecticut III, LLC | Watertown, CT | ISO New England (ISNE) | 3.5 GWh | May 2021 | Dec 2022 | Solar |
| Wesleyan University Cogen 1 | Wesleyan University | Middletown, CT | ISO New England (ISNE) | 10.9 GWh | Jan 2009 | Dec 2022 | Natural Gas |
| Wheelabrator Bridgeport | Wheelabrator Environmental Systems | Bridgeport, CT | ISO New England (ISNE) | 485.4 GWh | Jun 1988 | Mar 2024 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator Lisbon | Wheelabrator Environmental Systems | Lisbon, CT | ISO New England (ISNE) | 109.2 GWh | Sep 1995 | Mar 2024 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wilson Solar | Ecos Energy LLC | Lebanon, CT | ISO New England (ISNE) | 1.7 GWh | Feb 2018 | Dec 2022 | Solar |
| Wind Colebrook South | Wind Colebrook South | Colebrook, CT | ISO New England (ISNE) | 10.7 GWh | Oct 2015 | Mar 2024 | Wind |
| Woods Hill Solar | Woods Hill Solar, LLC | Pomfret, CT | ISO New England (ISNE) | 29.5 GWh | Nov 2018 | Mar 2024 | Solar |
| Yale New Haven - New London | Bloom Energy | New London, CT | ISO New England (ISNE) | 4.1 GWh | Aug 2022 | Dec 2022 | Natural Gas |
Browse Power Plants By Connecticut Counties
Figures are based on March 2024 generation numbers.| County | State Rank | Active Plants | Mar 2024 Generation |
|---|---|---|---|
| Capitol Planning Region, CT | # 7 | 45 | 986.8 GWh |
| Greater Bridgeport Planning Region, CT | # 2 | 10 | 6.7 TWh |
| Lower Connecticut River Valley Planning Region, CT | # 6 | 15 | 3.2 TWh |
| Naugatuck Valley Planning Region, CT | # 3 | 13 | 6.5 TWh |
| Northeastern Connecticut Planning Region, CT | # 4 | 17 | 6.4 TWh |
| County | State Rank | Active Plants | Mar 2024 Generation |
|---|---|---|---|
| Northwest Hills Planning Region, CT | # 9 | 11 | 76.0 GWh |
| South Central Connecticut Planning Region, CT | # 5 | 21 | 4.1 TWh |
| Southeastern Connecticut Planning Region, CT | # 1 | 50 | 15.9 TWh |
| Western Connecticut Planning Region, CT | # 8 | 14 | 337.8 GWh |