Natural Gas Power Plants in Connecticut
Every operating natural gas power plant in Connecticut on EIA-860M for 2026-07: 47 plants, 94 generating units and 5 GW of nameplate capacity across 8 counties, most of it inside ISO New England.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Plants
- 47
- 94 generating units
- Nameplate capacity
- 5 GW
- Counties
- 8
- Grid operator
- ISO New England
- covers most of these plants
Map of natural gas power plants in Connecticut
Every one of the 47 plants is drawn at the coordinate EIA files for it.
Loading map…
- Natural gas · 47
List of natural gas power plants in Connecticut
Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.
| CPV Towantic Energy CenterNatural Gas Fired Combined Cycle | CPV Towantic, LLC | New Haven | 841.5 | 3 | 2018 | Operating |
| Lake Road Generating PlantNatural Gas Fired Combined Cycle | Lake Road Generating Co LP | Windham | 840 | 3 | 2002 | Operating |
| Kleen Energy SystemsNatural Gas Fired Combined Cycle | Kleen Energy Systems, LLC | Middlesex | 693 | 3 | 2011 | Operating |
| Milford Power ProjectNatural Gas Fired Combined Cycle | Milford Power Co LLC | New Haven | 578 | 2 | 2004 | Operating |
| Bridgeport StationNatural Gas Fired Combined Cycle | Generation Bridge II Connecticut, LLC | Fairfield | 576.3 | 2 | 2019 | Operating |
| Bridgeport Energy ProjectNatural Gas Fired Combined Cycle | Bridgeport Energy LLC | Fairfield | 520 | 3 | 1998 | Operating |
| Wallingford EnergyNatural Gas Fired Combustion Turbine | Wallingford Energy LLC | New Haven | 350 | 7 | 2001 | Operating |
| Waterbury GenerationNatural Gas Fired Combustion Turbine | Engie North America | New Haven | 96 | 1 | 2009 | Operating |
| A L PierceNatural Gas Fired Combustion Turbine | MPH AL Pierce, LLC | New Haven | 84 | 1 | 2007 | Operating |
| Algonquin Windsor LocksNatural Gas Fired Combined Cycle | Ahlstrom Power Windsor Locks LLC | Hartford | 71 | 3 | 1990 | Operating |
| Pfizer Groton Plant2 technologies | Pfizer Inc | New London | 37.5 | 4 | 1952 | Operating |
| Kimberly Clark-Unit 1,2,32 technologies | Kimberly-Clark Corporation | Litchfield | 36.3 | 3 | 2008 | Operating |
| Pratt & WhitneyNatural Gas Fired Combustion Turbine | United Technologies | Hartford | 25.8 | 1 | 1992 | Operating |
| UCONN Cogen FacilityNatural Gas Fired Combined Cycle | University of Connecticut | Tolland | 25.7 | 4 | 2006 | Operating |
| Bridgeport Fuel Cell, LLCOther Natural Gas | Bridgeport Fuel Cell, LLC | Fairfield | 16.6 | 1 | 2013 | Operating |
| Rand Whitney CHP PlantNatural Gas Fired Combustion Turbine | Rand Whitney Containerboard L.P. | New London | 16.5 | 1 | 2005 | Operating |
| Foxwoods CoGenNatural Gas Fired Combined Cycle | Foxwoods Resort Casino | New London | 16.2 | 3 | 2010 | Operating |
| Derby Fuel CellOther Natural Gas | Derby Fuel Cell LLC | New Haven | 14 | 5 | 2024 | Operating |
| Hartford Hospital Cogeneration2 technologies | Cartier Energy, LLC | Hartford | 11.8 | 3 | 1988 | Operating |
| Generate Colchester Fuel Cells, LLCOther Natural Gas | Generate Colchester Fuel Cells, LLC | New London | 10 | 1 | 2021 | Operating |
| Sikorsky Aircraft CHP3 technologies | Sikorsky Aircraft Corporation | Fairfield | 9.9 | 3 | 2010 | Operating |
| Subase Microgrid ProjectOther Natural Gas | Connecticut Mun Elec Engy Coop | New London | 7.4 | 2 | 2022 | Operating |
| Naval Sub Base New London Fuel CellOther Natural Gas | Groton Station Fuel Cell, LLC | New London | 7.4 | 2 | 2022 | Operating |
| Bradley Energy CenterNatural Gas Internal Combustion Engine | Ameresco Select Inc | Hartford | 5.8 | 4 | 2002 | Operating |
| Pfizer Groton Fuel CellOther Natural Gas | Groton Fuel Cell 1 LLC | New London | 5.6 | 2 | 2016 | Operating |
| UI RCP Bridgeport Seaside2 technologies | United Illuminating Co | Fairfield | 5 | 2 | 2015 | Operating |
| South Windsor Fuel CellOther Natural Gas | South Energy Investments LLC | Hartford | 5 | 1 | 2020 | Operating |
| Frito Lay IncorporatedNatural Gas Fired Combustion Turbine | Frito Lay Incorporated Dayville | Windham | 4.6 | 1 | 2009 | Operating |
| Fairfield University CHP PlantNatural Gas Fired Combustion Turbine | Fairfield University | Fairfield | 4.5 | 1 | 2007 | Operating |
| Danbury Hospital Cogen PlantNatural Gas Fired Combustion Turbine | Danbury Hospital | Fairfield | 4.3 | 1 | 2011 | Operating |
| HSCo CHPNatural Gas Fired Combustion Turbine | Cartier Energy, LLC | Hartford | 4 | 1 | 2009 | Operating |
| TRS Fuel CellOther Natural Gas | TRS Fuel Cell, LLC | Fairfield | 3.7 | 1 | 2019 | Out of service and NOT expected to return to service in next calendar year |
| CCSU Co-Gen-STBY Gen2 technologies | Central Connecticut State University | Hartford | 3.6 | 4 | 1993 | Standby/Backup |
| UDR Glastonbury Fuel CellOther Natural Gas | UIL Distributed Resources, LLC | Hartford | 3.4 | 1 | 2016 | Operating |
| Cellu TissueNatural Gas Internal Combustion Engine | Dunn Paper East Hartford, LLC | Hartford | 3 | 1 | 2009 | Operating |
| UI RCP New Haven Fuel CellOther Natural Gas | United Illuminating Co | New Haven | 2.8 | 1 | 2015 | Operating |
| UI RCP Woodbridge FCOther Natural Gas | United Illuminating Co | New Haven | 2.8 | 1 | 2016 | Operating |
| Pepperidge Farm BloomfieldOther Natural Gas | Pepperidge Farm, Inc.- Bloomfield | Hartford | 2.6 | 2 | 2008 | Operating |
| Wesleyan University Cogen 1Natural Gas Internal Combustion Engine | Wesleyan University | Middlesex | 2.4 | 1 | 2009 | Operating |
| Medtronic - New HavenOther Natural Gas | Bloom Energy | New Haven | 2.3 | 1 | 2020 | Operating |
| Medtronic - New Haven 2Other Natural Gas | Bloom Energy | New Haven | 2.2 | 1 | 2020 | Operating |
| Yale New Haven - New LondonOther Natural Gas | Bloom Energy | New London | 1.8 | 1 | 2022 | Operating |
| CCSU Fuel Cell ProjectOther Natural Gas | New Britain Renewable Energy, LLC | Hartford | 1.4 | 1 | 2012 | Operating |
| Trinity College Fuel CellOther Natural Gas | Onsite Partners, LLC | Hartford | 1.4 | 1 | 2018 | Operating |
| UB Fuel CellOther Natural Gas | UB Fuel Cell | Fairfield | 1.4 | 1 | 2015 | Operating |
| Connecticut CollegeOther Natural Gas | Bloom Energy | New London | 1.2 | 1 | 2019 | Operating |
| FDX010.0 FedEx Fuel CellOther Natural Gas | 2016 ESA Project Company, LLC | Middlesex | 1 | 1 | 2018 | Operating |
Largest natural gas power plants in Connecticut
- 1CPV Towantic Energy CenterNew Haven County, Connecticut841.5 MW
- 2Lake Road Generating PlantWindham County, Connecticut840 MW
- 3Kleen Energy SystemsMiddlesex County, Connecticut693 MW
- 4Milford Power ProjectNew Haven County, Connecticut578 MW
- 5Bridgeport StationFairfield County, Connecticut576.3 MW
- 6Bridgeport Energy ProjectFairfield County, Connecticut520 MW
- 7Wallingford EnergyNew Haven County, Connecticut350 MW
- 8Waterbury GenerationNew Haven County, Connecticut96 MW
- 9A L PierceNew Haven County, Connecticut84 MW
- 10Algonquin Windsor LocksHartford County, Connecticut71 MW
Natural gas power plants by county in Connecticut
The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.
| County | Plants | Nameplate MW |
|---|---|---|
| New Haven | 10 | 1,973.6 |
| Fairfield | 9 | 1,141.7 |
| Windham | 2 | 844.6 |
| Middlesex | 3 | 696.4 |
| Hartford | 12 | 138.8 |
| New London | 9 | 103.6 |
| Litchfield | 1 | 36.3 |
| Tolland | 1 | 25.7 |
Natural Gas Power Plants in Connecticut: FAQ
- How many natural gas power plants are in Connecticut?
- 47, with 5 GW of nameplate capacity between them, spread over 8 counties. That is the EIA-860M operating count for 2026-07.
- Is there a map of Connecticut natural gas power plants?
- Yes — the map above. Each dot is one natural gas power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
- Which is the largest natural gas power plant in Connecticut?
- CPV Towantic Energy Center, at 842 MW. The table is sorted largest first, so the rest follow it.
- Is there a natural gas power plant near me in Connecticut?
- The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
- Which grid operator runs Connecticut's natural gas power plants?
- Most of them sit inside ISO New England, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.
- How current is this, and what is left out?
- EIA-860M for 2026-07. Combined cycle, combustion turbine, steam turbine, internal combustion and other gas-fired units. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.