Directory of Power Plants in Connecticut
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Bradley Energy Center | Ameresco Select Inc | Windsor Locks, CT | ISO New England (ISNE) | 15.0 GWh | Oct 2002 | Dec 2022 | Natural Gas |
| Medtronic - New Haven | Bloom Energy | North Haven, CT | ISO New England (ISNE) | 15.2 GWh | Sep 2020 | Dec 2023 | Natural Gas |
| New Haven Harbor | Generation Bridge II Connecticut, LLC | New Haven, CT | ISO New England (ISNE) | 16.4 GWh | Jun 1975 | Jun 2024 | Natural Gas : 68.6% Kerosene : 27.6% Residual Fuel Oil : 3.8% |
| UI RCP Woodbridge FC | United Illuminating Co | Woodbridge, CT | ISO New England (ISNE) | 17.4 GWh | Nov 2016 | Dec 2023 | Natural Gas |
| Pepperidge Farm Bloomfield | Pepperidge Farm, Inc.- Bloomfield | Bloomfield, CT | ISO New England (ISNE) | 17.5 GWh | Jul 2008 | Dec 2023 | Natural Gas |
| Medtronic - New Haven 2 | Bloom Energy | North Haven, CT | ISO New England (ISNE) | 18.4 GWh | Sep 2020 | Dec 2023 | Natural Gas |
| UI RCP New Haven Fuel Cell | United Illuminating Co | New Haven, CT | ISO New England (ISNE) | 21.1 GWh | Jul 2015 | Jun 2024 | Natural Gas |
| UI RCP Bridgeport Seaside | United Illuminating Co | Bridgeport, CT | ISO New England (ISNE) | 22.0 GWh | Oct 2015 | Jun 2024 | Natural Gas : 95.9% Solar : 4.1% |
| Wallingford Solar | Wallingford Renewable Energy, LLC | Wallingford, CT | ISO New England (ISNE) | 22.5 GWh | Aug 2021 | Dec 2023 | Solar |
| UDR Glastonbury Fuel Cell | UIL Distributed Resources, LLC | Glastonbury, CT | ISO New England (ISNE) | 22.8 GWh | Jan 2016 | Dec 2023 | Natural Gas |
| Frito Lay Incorporated | Frito Lay Incorporated Dayville | Dayville, CT | ISO New England (ISNE) | 25.5 GWh | Feb 2009 | Jun 2024 | Natural Gas |
| Fairfield University CHP Plant | Fairfield University | Fairfield, CT | ISO New England (ISNE) | 27.0 GWh | Sep 2007 | Dec 2023 | Natural Gas |
| Woods Hill Solar | Woods Hill Solar, LLC | Pomfret, CT | ISO New England (ISNE) | 27.6 GWh | Nov 2018 | Jun 2024 | Solar |
| Danbury Hospital Cogen Plant | Danbury Hospital | Danbury, CT | ISO New England (ISNE) | 28.0 GWh | Oct 2011 | Dec 2023 | Natural Gas |
| HSCo CHP | Cartier Energy, LLC | Hartford, CT | ISO New England (ISNE) | 28.8 GWh | Sep 2009 | Dec 2022 | Natural Gas |
| Naval Sub Base New London Fuel Cell | Groton Station Fuel Cell, LLC | Groton, CT | ISO New England (ISNE) | 36.4 GWh | Nov 2022 | Dec 2023 | Natural Gas |
| Nutmeg Solar | Nutmeg Solar LLC | Enfield, CT | ISO New England (ISNE) | 39.7 GWh | Nov 2020 | Dec 2022 | Solar |
| Fusion Solar Center LLC | Fusion Solar Centre, L.L.C | Baltic, CT | ISO New England (ISNE) | 41.8 GWh | Feb 2018 | Jun 2024 | Solar |
| South Windsor Fuel Cell | South Energy Investments LLC | South Windsor, CT | ISO New England (ISNE) | 42.0 GWh | Feb 2020 | Dec 2023 | Natural Gas |
| Waterbury Generation | Engie North America | Waterbury, CT | ISO New England (ISNE) | 42.5 GWh | May 2009 | Dec 2023 | Natural Gas : 99.7% |
| Rainbow (CT) | Farmington River Power Company | Windsor, CT | ISO New England (ISNE) | 42.6 GWh | Nov 1925 | Jun 2024 | Water |
| Pfizer Groton Fuel Cell | Groton Fuel Cell 1 LLC | Groton, CT | ISO New England (ISNE) | 44.8 GWh | Sep 2016 | Dec 2023 | Natural Gas |
| Bulls Bridge | FirstLight Power Resources Services LLC | New Milford, CT | ISO New England (ISNE) | 45.4 GWh | Dec 1902 | Dec 2023 | Water |
| DWW Solar ll | DWW Solar ll LLC | Simsbury, CT | ISO New England (ISNE) | 47.3 GWh | Nov 2019 | Jun 2024 | Solar |
| Hartford Hospital Cogeneration | Cartier Energy, LLC | Hartford, CT | ISO New England (ISNE) | 53.0 GWh | Jun 1988 | Dec 2022 | Natural Gas |
| Subase Microgrid Project | Connecticut Mun Elec Engy Coop | Groton, CT | ISO New England (ISNE) | 53.3 GWh | Nov 2022 | Dec 2023 | Natural Gas |
| Falls Village | FirstLight Power Resources Services LLC | Falls Village, CT | ISO New England (ISNE) | 56.0 GWh | Dec 1913 | Dec 2023 | Water |
| Sikorsky Aircraft CHP | Sikorsky Aircraft Corporation | Stratford, CT | ISO New England (ISNE) | 69.4 GWh | May 2010 | Dec 2023 | Natural Gas : 99.8% |
| Pfizer Groton Plant | Pfizer Inc | Groton, CT | ISO New England (ISNE) | 74.5 GWh | Dec 1947 | Jun 2024 | Natural Gas : 96.5% Distillate Fuel Oil : 3.5% |
| Quinebaug Solar | Quinebaug Solar, LLC | Canterbury, CT | ISO New England (ISNE) | 83.9 GWh | Nov 2021 | Jun 2024 | Solar |
| Generate Colchester Fuel Cells, LLC | Generate Colchester Fuel Cells, LLC | Colchester, CT | ISO New England (ISNE) | 88.2 GWh | Sep 2021 | Dec 2023 | Natural Gas |
| Montville Station | NRG Montville Operations Inc | Uncasville, CT | ISO New England (ISNE) | 97.4 GWh | Dec 1953 | Dec 2022 | Residual Fuel Oil : 78.4% Natural Gas : 20.4% Distillate Fuel Oil : 1.2% |
| Wheelabrator Lisbon | Wheelabrator Environmental Systems | Lisbon, CT | ISO New England (ISNE) | 107.9 GWh | Sep 1995 | Jun 2024 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Bridgeport Fuel Cell, LLC | Bridgeport Fuel Cell, LLC | Bridgeport, CT | ISO New England (ISNE) | 112.9 GWh | Nov 2013 | Dec 2023 | Natural Gas |
| Covanta Bristol Energy | Covanta Bristol Inc | Bristol, CT | ISO New England (ISNE) | 114.7 GWh | Nov 1987 | Jun 2024 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Stevenson | FirstLight Power Resources Services LLC | Monroe, CT | ISO New England (ISNE) | 117.9 GWh | Dec 1918 | Dec 2023 | Water |
| Covanta Southeastern Connecticut Company | Covanta Southeastern Connecticut Company | Preston, CT | ISO New England (ISNE) | 125.5 GWh | Nov 1991 | Jun 2024 | Non-biogenic Municipal Solid Waste : 53.9% Biogenic Municipal Solid Waste : 44.1% Distillate Fuel Oil : 2.0% |
| UCONN Cogen Facility | University of Connecticut | Storrs, CT | ISO New England (ISNE) | 133.1 GWh | Feb 2006 | Jun 2024 | Natural Gas : 99.7% |
| Algonquin Windsor Locks | Algonquin Windsor Locks LLC | Windsor Locks, CT | ISO New England (ISNE) | 136.3 GWh | Dec 1989 | Jun 2024 | Natural Gas : 99.9% |
| Pratt & Whitney | United Technologies | East Hartford, CT | ISO New England (ISNE) | 138.8 GWh | Dec 1991 | Jun 2024 | Natural Gas : 99.8% |
| Rand Whitney CHP Plant | Rand Whitney Containerboard L.P. | Montville, CT | ISO New England (ISNE) | 139.4 GWh | Mar 2005 | Jun 2024 | Natural Gas |
| Wallingford Energy | Wallingford Energy LLC | Wallingford, CT | ISO New England (ISNE) | 163.5 GWh | Jul 2001 | Dec 2023 | Natural Gas |
| Shepaug | FirstLight Power Resources Services LLC | Southbury, CT | ISO New England (ISNE) | 173.9 GWh | Dec 1954 | Dec 2023 | Water |
| Middletown | Middletown Power LLC | Middletown, CT | ISO New England (ISNE) | 187.1 GWh | Sep 1958 | Dec 2022 | Residual Fuel Oil : 69.9% Natural Gas : 29.9% |
| Kimberly Clark-Unit 1,2,3 | Kimberly-Clark Corporation | New Milford, CT | ISO New England (ISNE) | 236.0 GWh | Mar 2008 | Dec 2023 | Natural Gas |
| Wheelabrator Bridgeport | Wheelabrator Environmental Systems | Bridgeport, CT | ISO New England (ISNE) | 485.7 GWh | Jun 1988 | Jun 2024 | 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) | 2.5 TWh | May 1998 | Jun 2024 | Natural Gas |
| Kleen Energy Systems Project | Kleen Energy Systems, LLC | Middletown, CT | ISO New England (ISNE) | 3.1 TWh | Jun 2011 | Jun 2024 | Natural Gas : 99.4% Distillate Fuel Oil : 0.6% |
| Bridgeport Station | Generation Bridge II Connecticut, LLC | Bridgeport, CT | ISO New England (ISNE) | 3.5 TWh | Jul 1961 | Jun 2024 | Natural Gas |
| Milford Power Project | Milford Power Co LLC | Milford, CT | ISO New England (ISNE) | 3.8 TWh | Jan 2004 | Jun 2024 | Natural Gas |
| CPV Towantic Energy Center | CPV Towantic, LLC | Oxford, CT | ISO New England (ISNE) | 5.9 TWh | Apr 2018 | Jun 2024 | Natural Gas |
| Lake Road Generating Plant | Lake Road Generating Co LP | Dayville, CT | ISO New England (ISNE) | 6.2 TWh | Feb 2002 | Jun 2024 | Natural Gas |
| Millstone | Dominion Energy Nuclear Conn Inc | Waterford, CT | ISO New England (ISNE) | 16.2 TWh | Nov 1975 | Jun 2024 | Nuclear |
Browse Power Plants By Connecticut Counties
Figures are based on May 2024 generation numbers.| County | State Rank | Active Plants | May 2024 Generation |
|---|---|---|---|
| Northwest Hills Planning Region, CT | # 9 | 15 | 98.1 GWh |
| Western Connecticut Planning Region, CT | # 8 | 14 | 337.6 GWh |
| Capitol Planning Region, CT | # 7 | 49 | 767.0 GWh |
| Lower Connecticut River Valley Planning Region, CT | # 6 | 15 | 3.3 TWh |
| South Central Connecticut Planning Region, CT | # 5 | 22 | 4.1 TWh |
| County | State Rank | Active Plants | May 2024 Generation |
|---|---|---|---|
| Naugatuck Valley Planning Region, CT | # 4 | 13 | 6.3 TWh |
| Northeastern Connecticut Planning Region, CT | # 3 | 17 | 6.3 TWh |
| Greater Bridgeport Planning Region, CT | # 2 | 10 | 6.9 TWh |
| Southeastern Connecticut Planning Region, CT | # 1 | 50 | 17.2 TWh |