Power plants in Connecticut
181 operating power projects with 10,177 MW of nameplate capacity, from EIA-860M for August 2026.
Projects
181
Nameplate capacity
10,177 MW
Counties with a plant
8
Operators
103
Power markets: ISO-NE prices
Capacity by fuel
Natural gas · 5,029 MW · 45Nuclear · 2,260 MW · 1Other fuels · 2,234 MW · 27Solar · 502 MW · 93Hydro · 115 MW · 13Pumped storage · 31 MW · 1Wind · 5 MW · 1Battery storage · 2 MW
MW is nameplate from operating generators and batteries. Plant counts use each project's primary fuel, so a coal and gas plant counts once.
Largest power plants in Connecticut
Top 50 · All 181 plants| Plant | Primary fuel | MW | County | Operator |
|---|---|---|---|---|
| Millstone | Nuclear | 2,260 | New London | Dominion Energy Nuclear Conn Inc |
| CPV Towantic Energy Center | Natural gas | 842 | New Haven | CPV Towantic, LLC |
| Lake Road Generating Plant | Natural gas | 840 | Windham | Lake Road Generating Co LP |
| Kleen Energy Systems | Natural gas | 693 | Middlesex | Kleen Energy Systems, LLC |
| New Haven Steam | Oil | 642 | New Haven | Generation Bridge II Connecticut, LLC |
| Milford Power Project | Natural gas | 578 | New Haven | Milford Power Co LLC |
| Bridgeport Station | Natural gas | 576 | Fairfield | Generation Bridge II Connecticut, LLC |
| Bridgeport Energy Project | Natural gas | 520 | Fairfield | Bridgeport Energy LLC |
| Montville Station | Oil | 490 | New London | Montville Power LLC |
| Wallingford Energy | Natural gas | 350 | New Haven | Wallingford Energy LLC |
Connecticut power plants by fuel
Newest plants in Connecticut
Ordered by the month the first generator began operating.
Mansfield LandfillSolar · 1.8 MW · Tolland County · June 2026Stafford Solar OneSolar · 4 MW · Tolland County · April 2026Woodstock Solar OneSolar · 3 MW · Windham County · March 2026North Franklin SolarSolar · 5 MW · New London County · December 2025Windsor Solar OneSolar · 3 MW · Hartford County · December 2025New Britain - 142 Deming RdSolar · 1.2 MW · Hartford County · December 2025
Counties with the most capacity
Largest operators in Connecticut
Dominion Energy Nuclear Conn Inc1 plant · 2,260 MW
Generation Bridge II Connecticut, LLC2 plants · 1,218 MW
CPV Towantic, LLC1 plant · 842 MW
Lake Road Generating Co LP1 plant · 840 MW
Kleen Energy Systems, LLC1 plant · 693 MW
Grouped by EIA operator name. Parent companies are not merged.
All 181 plants in Connecticut, by county
Fairfield County 16 plants
- Bridgeport Station Natural gas · 576.3 MW
- Bridgeport Energy Project Natural gas · 520 MW
- Cos Cob Oil · 115 MW
- Waterside Power, LLC Oil · 69.6 MW
- Wheelabrator Bridgeport Municipal solid waste · 67 MW
- Stevenson Hydro · 30.5 MW
- Bridgeport Fuel Cell, LLC Natural gas · 16.6 MW
- Stamford Health Oil · 10.4 MW
- Sikorsky Aircraft CHP Natural gas · 9.9 MW
- Derby Hydro Hydro · 8 MW
- UI RCP Bridgeport Seaside Natural gas · 5 MW
- Fairfield University CHP Plant Natural gas · 4.5 MW
- Danbury Hospital Cogen Plant Natural gas · 4.3 MW
- Emerald Gardens PKI, LLC Solar · 1.6 MW
- Stamford Health Tully Health Center Oil · 1.5 MW
- UB Fuel Cell Natural gas · 1.4 MW
Hartford County 41 plants
- Gravel Pit Solar, LLC Solar · 120 MW
- Algonquin Windsor Locks Natural gas · 71 MW
- DWW Solar ll Solar · 36.9 MW
- Pratt & Whitney Natural gas · 25.8 MW
- Nutmeg Solar Solar · 19.6 MW
- Covanta Bristol Energy Municipal solid waste · 16.3 MW
- Hartford Hospital Cogeneration Natural gas · 11.8 MW
- Rainbow (CT) Hydro · 8 MW
- Bradley Energy Center Natural gas · 5.8 MW
- South Windsor Fuel Cell Natural gas · 5 MW
- East Windsor Solar One Solar · 5 MW
- Southington Solar One Solar · 4.7 MW
- HSCo CHP Natural gas · 4 MW
- Enfield Solar One Solar · 4 MW
- East Windsor Solar Two Solar · 4 MW
- Raffia Road Solar Project Solar · 4 MW
- East Windsor Solar · 4 MW
- Amazon BDL4 Solar · 3.9 MW
- Burlington Solar 1 Solar · 3.5 MW
- UDR Glastonbury Fuel Cell Natural gas · 3.4 MW
- Cellu Tissue Natural gas · 3 MW
- Town of Rocky Hill PV CSG Solar · 3 MW
- Bristol Solar One, LLC Solar · 3 MW
- Glastonbury Solar One Solar · 3 MW
- Windsor Solar One Solar · 3 MW
- Niagara Bottling - Bloomfield Solar · 2.8 MW
- Pepperidge Farm Bloomfield Natural gas · 2.6 MW
- Canis Major Solar Farm Solar · 2 MW
- Norcap South Solar · 2 MW
- Norcap North Solar · 2 MW
- Powder Hill Solar · 2 MW
- CCSU Fuel Cell Project Natural gas · 1.4 MW
- Trinity College Fuel Cell Natural gas · 1.4 MW
- ALDI DC 2 Solar · 1.2 MW
- New Britain - 142 Deming Rd Solar · 1.2 MW
- Advance Stores Company, Inc Solar · 1 MW
- Hartford Landfill Solar EGF Solar · 1 MW
- Manchester Community College East Solar · 1 MW
- Manchester Community College North Solar · 1 MW
- Ticket Network South Windsor Solar · 1 MW
- Corbin Russwin Phase 3 Berlin Solar · 1 MW
Litchfield County 17 plants
- Kimberly Clark-Unit 1,2,3 Natural gas · 36.3 MW
- Rocky River (CT) Pumped storage · 31 MW
- Franklin Drive Oil · 21.8 MW
- Torrington Oil · 21.8 MW
- SR Litchfield Solar · 19.8 MW
- Falls Village Hydro · 9 MW
- Bulls Bridge Hydro · 7.2 MW
- Wind Colebrook South Wind · 5 MW
- Norfolk Landfill Solar Project Solar · 4 MW
- Becton Dickinson Ground & Roof Top Solar · 2.5 MW
- Torrington Solar One, LLC Solar · 2 MW
- Watertown Solar One, LLC Solar · 2 MW
- Platt Hill Solar · 2 MW
- Sand Road Solar · 2 MW
- Bunce Solar · 2 MW
- New Milford Gas Recovery Landfill gas · 1.6 MW
- Canis Minor Solar Farm Solar · 1 MW
Middlesex County 8 plants
- Kleen Energy Systems Natural gas · 693 MW
- GenConn Middletown LLC Oil · 242 MW
- Wesleyan University Cogen 1 Natural gas · 2.4 MW
- CP East Hampton I & II Solar Solar · 2 MW
- FedEx Middletown Solar · 1.5 MW
- CP Middletown Solar I LLC Solar · 1 MW
- CP Middletown Solar II LLC Solar · 1 MW
- FDX010.0 FedEx Fuel Cell Natural gas · 1 MW
New Haven County 27 plants
- CPV Towantic Energy Center Natural gas · 841.5 MW
- New Haven Steam Oil · 641.5 MW
- Milford Power Project Natural gas · 578 MW
- Wallingford Energy Natural gas · 350 MW
- GenConn Devon LLC Oil · 242 MW
- Devon Station Oil · 222.6 MW
- Waterbury Generation Natural gas · 96 MW
- A L Pierce Natural gas · 84 MW
- Shepaug Hydro · 37.2 MW
- Branford Oil · 21.8 MW
- Wallingford Solar Solar · 16.1 MW
- Derby Fuel Cell Natural gas · 14 MW
- Brass Mill Center Solar · 3.4 MW
- UI RCP New Haven Fuel Cell Natural gas · 2.8 MW
- UI RCP Woodbridge FC Natural gas · 2.8 MW
- Kinneytown New Old Hydro · 2.3 MW
- Medtronic - New Haven Natural gas · 2.3 MW
- Medtronic - New Haven 2 Natural gas · 2.2 MW
- CTGB Manson Youth Solar · 2 MW
- North Haven Solar One Solar · 1.6 MW
- Dynamic Energy CT STAG Solar · 1.5 MW
- IKEA New Haven Rooftop PV & Fuel Cell Solar · 1.1 MW
- Town of Branford Solar · 1.1 MW
- Amazon BDL3 Solar Project Solar · 1 MW
- Park Solar Solar · 1 MW
- Benz Solar 1 Solar · 1 MW
- Benz Solar 2 Solar · 1 MW
New London County 45 plants
- Millstone Nuclear · 2,259.9 MW
- Montville Station Oil · 489.9 MW
- Pfizer Groton Plant Natural gas · 37.5 MW
- Fusion Solar Center LLC Solar · 20 MW
- Covanta Southeastern Connecticut Company Municipal solid waste · 18.3 MW
- Rand Whitney CHP Plant Natural gas · 16.5 MW
- Foxwoods CoGen Natural gas · 16.2 MW
- North Stonington Solar Center, LLC Solar · 15 MW
- Wheelabrator Lisbon Municipal solid waste · 14.6 MW
- SR North Stonington Solar · 12 MW
- Fort Hill 1, 2, 3 & 4 Oil · 10.4 MW
- Backus Microgrid Project Oil · 10.4 MW
- Generate Colchester Fuel Cells, LLC Natural gas · 10 MW
- Subase Microgrid Project Natural gas · 7.4 MW
- Naval Sub Base New London Fuel Cell Natural gas · 7.4 MW
- Pfizer Groton Fuel Cell Natural gas · 5.6 MW
- Bridge Street 1 & 2 Oil · 5.2 MW
- Gary Court 1 & 2 Oil · 5.2 MW
- LNG 1 & 2 Oil · 5.2 MW
- Lebanon Pines 1 & 2 Oil · 5.2 MW
- Water Treatment 1 & 2 Oil · 5.2 MW
- North Franklin Solar Solar · 5 MW
- CMEEC - Polaris Park Solar Hybrid Solar · 4.3 MW
- CMEEC - Norwich Stott St Solar Hybrid Solar · 4.3 MW
- Antares-GRE 314 East Lyme LLC Solar · 4 MW
- Wyre Wynd Hydroelectric Project Hydro · 2.8 MW
- Jewett City 1 Oil · 2.6 MW
- CMEEC - Bozrah Solar · 2.5 MW
- Tunnel Hydro · 2 MW
- Norwich WWTP Oil · 2 MW
- Yale New Haven - New London Natural gas · 1.8 MW
- Taftville Hydro · 1.6 MW
- Tenth Street Hydro · 1.4 MW
- CMEEC - Rogers Rd Solar Solar · 1.3 MW
- Connecticut College Natural gas · 1.2 MW
- Conn Mun Electric Energy Coop Solar · 1 MW
- CMEEC - Navy NE Trident Solar · 1 MW
- Franklin Solar (CT) Solar · 1 MW
- Wilson Solar (CT) Solar · 1 MW
- Jefferson Solar (CT) Solar · 1 MW
- Hamilton Solar Solar · 1 MW
- Adams Solar Solar · 1 MW
- Sherman Solar Solar · 1 MW
- Jackson Solar (CT) Solar · 1 MW
- Clinton Solar Solar · 1 MW
Tolland County 13 plants
- UCONN Cogen Facility Natural gas · 25.7 MW
- Somers Solar Center, LLC Solar · 5 MW
- Stafford Solar One Solar · 4 MW
- Stafford MS Ground Mount Community Solar Solar · 2 MW
- Barrow Solar Solar · 2 MW
- Ellington - 277 Sadds Mill Solar · 2 MW
- CTGB Maloney and Webster Solar · 2 MW
- Bilton Solar Solar · 2 MW
- CTGB Osborn Solar · 1.8 MW
- Mansfield Landfill Solar · 1.8 MW
- Blair Solar Solar · 1 MW
- Madison Solar (CT) Solar · 1 MW
- Few Solar Solar · 1 MW
Windham County 14 plants
- Lake Road Generating Plant Natural gas · 840 MW
- Quinebaug Solar Solar · 49.4 MW
- Plainfield Renewable Energy LLC Wood biomass · 43 MW
- Woods Hill Solar Solar · 20 MW
- Frito Lay Incorporated Natural gas · 4.6 MW
- Woodstock Solar One Solar · 3 MW
- Quinebaug Lower Project Hydro · 2.5 MW
- Scotland Dam Hydro · 2 MW
- Sydney Solar Solar · 2 MW
- Dickinson Solar (CT) Solar · 2 MW
- Barrett Farm Solar - Phase I Solar · 1.7 MW
- Plainfield Solar 2 Solar · 1 MW
- Plainfield Solar 1 Solar · 1 MW
- McHenry Solar Solar · 1 MW
Questions about power plants in Connecticut
How many power plants are in Connecticut?
EIA-860M for August 2026 lists 181 operating power projects in Connecticut, with 10,177 MW of nameplate capacity including batteries.
What is the largest power plant in Connecticut?
Millstone in New London County, with 2,259.9 MW of nameplate capacity. The next largest is CPV Towantic Energy Center, with 841.5 MW.
How much of Connecticut's capacity is nuclear?
2,260 MW, about 22% of nameplate capacity. 1 project have nuclear as their primary fuel.
Source: EIA-860M August 2026, published 2026-09-24. Page updated 2026-10-04. Data sources