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Power Plants in Connecticut
All 186 operable plants · EIA inventory, August 2026.
Total capacity
11 GW
40th largest of the 50 states and DC
Plants
186
184 in service
Largest plant
2,260 MW
Millstone
Capacity by fuel
45%
28%
21%
| Fuel | Capacity | Share | Plants |
|---|---|---|---|
| Natural gas | 4,963 MW | 45.1% | 48 |
| Other | 3,104 MW | 28.2% | 28 |
| Nuclear | 2,260 MW | 20.5% | 1 |
| Solar | 501 MW | 4.6% | 93 |
| Hydro | 168 MW | 1.5% | 15 |
| Wind | 5.0 MW | 0.0% | 1 |
Nameplate capacity — what the fleet could produce running flat out — not what it actually generated. A plant is filed under the fuel carrying most of its capacity. See what Connecticut actually generated →
Largest plants in Connecticut
| # | Plant | Fuel | Capacity | Online |
|---|---|---|---|---|
| 1 | MillstoneNew London County | Nuclear | 2,260 MW | 1975 |
| 2 | CPV Towantic Energy CenterNew Haven County | Natural gas | 842 MW | 2018 |
| 3 | Lake Road Generating PlantWindham County | Natural gas | 840 MW | 2002 |
| 4 | MiddletownMiddlesex County | Other | 786 MW | 1958 |
| 5 | Kleen Energy SystemsMiddlesex County | Natural gas | 693 MW | 2011 |
| 6 | New Haven SteamNew Haven County | Other | 642 MW | 1975 |
| 7 | Milford Power ProjectNew Haven County | Natural gas | 578 MW | 2004 |
| 8 | Bridgeport StationFairfield County | Natural gas | 576 MW | 2019 |
| 9 | Bridgeport Energy ProjectFairfield County | Natural gas | 520 MW | 1998 |
| 10 | Montville StationNew London County | Other | 495 MW | 1954 |
Connecticut's generating fleet in context
Connecticut's generating fleet holds 11,000 megawatts of nameplate capacity and ranks 40th among the 50 states and DC. This is capacity — what the equipment could produce running flat out — not generation, which differs because a megawatt of solar and a megawatt of nuclear produce very different amounts of electricity over a year. Natural gas dominates the mix at 45.1% of capacity across 48 plants, while other fuels account for 28.2%. Nuclear provides 20.5% from a single station, and solar contributes 4.6% spread across 93 plants. Hydro makes up 1.5% and wind rounds out the fleet at less than 1%.
The five largest plants anchor the fleet. Millstone, the state's nuclear station with 2,260 megawatts across 2 units, first came online in January 1975. CPV Towantic Energy Center, a natural gas facility in New Haven County with 842 megawatts, entered service in 2018. Lake Road Generating Plant, also natural gas and also with three units totalling 840 megawatts, came online in 2002. Middletown, an other-fuel plant with 786 megawatts across 4 units, dates to 1958. Kleen Energy Systems, a natural gas facility with 693 megawatts, followed in 2011. The state's fleet spans from Bulls Bridge, first online in January 1903, to Mansfield Landfill, which entered service in June 2026.
Written from the EIA figures on this page, covering data through August 2026.
Every plant in Connecticut, by fuel
Natural gas48 plants · 4,963 MW
All US natural gas plants →Other28 plants · 3,104 MW
All US other plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Middletown | Middlesex | 786 MW | 4 | 1958 |
| New Haven Steam | New Haven | 642 MW | 4 | 1975 |
| Montville Station | New London | 495 MW | 4 | 1954 |
| GenConn Devon LLC | New Haven | 242 MW | 4 | 2010 |
| GenConn Middletown LLC | Middlesex | 242 MW | 4 | 2011 |
| Devon Station | New Haven | 223 MW | 5 | 1985 |
| Cos Cob | Fairfield | 115 MW | 5 | 1969 |
| Waterside Power, LLC | Fairfield | 70 MW | 3 | 2004 |
| Wheelabrator Bridgeport | Fairfield | 67 MW | 1 | 1988 |
| Plainfield Renewable Energy LLC | Windham | 43 MW | 1 | 2013 |
| Branford | New Haven | 22 MW | 1 | 1967 |
| Franklin Drive | Litchfield | 22 MW | 1 | 1968 |
| Torrington | Litchfield | 22 MW | 1 | 1967 |
| Covanta Southeastern Connecticut Company | New London | 18 MW | 1 | 1991 |
| Covanta Bristol Energy | Hartford | 16 MW | 1 | 1987 |
| Wheelabrator Lisbon | New London | 15 MW | 1 | 1995 |
| Backus Microgrid Project | New London | 10 MW | 4 | 2014 |
| Fort Hill 1, 2, 3 & 4 | New London | 10 MW | 4 | 2010 |
| Stamford Health | Fairfield | 10 MW | 9 | 1984 |
| Bridge Street 1 & 2 | New London | 5.2 MW | 2 | 2010 |
| Gary Court 1 & 2 | New London | 5.2 MW | 2 | 2010 |
| LNG 1 & 2 | New London | 5.2 MW | 2 | 2010 |
| Lebanon Pines 1 & 2 | New London | 5.2 MW | 2 | 2010 |
| Water Treatment 1 & 2 | New London | 5.2 MW | 2 | 2010 |
| Jewett City 1 | New London | 2.6 MW | 1 | 2010 |
| Norwich WWTP | New London | 2.0 MW | 1 | 2006 |
| New Milford Gas Recovery | Litchfield | 1.6 MW | 2 | 2008 |
| Stamford Health Tully Health Center | Fairfield | 1.5 MW | 2 | 2002 |
Nuclear1 plant · 2,260 MW
All US nuclear plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Millstone | New London | 2,260 MW | 2 | 1975 |
Solar93 plants · 501 MW
All US solar plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Gravel Pit Solar, LLC | Hartford | 120 MW | 2 | 2025 |
| Quinebaug Solar | Windham | 49 MW | 1 | 2021 |
| DWW Solar ll | Hartford | 37 MW | 1 | 2019 |
| Fusion Solar Center LLC | New London | 20 MW | 1 | 2018 |
| Woods Hill Solar | Windham | 20 MW | 1 | 2018 |
| SR Litchfield | Litchfield | 20 MW | 1 | 2025 |
| Nutmeg Solar | Hartford | 20 MW | 1 | 2020 |
| Wallingford Solar | New Haven | 16 MW | 1 | 2021 |
| North Stonington Solar Center, LLC | New London | 15 MW | 1 | 2022 |
| SR North Stonington | New London | 12 MW | 1 | 2024 |
| East Windsor Solar One | Hartford | 5.0 MW | 1 | 2021 |
| North Franklin Solar | New London | 5.0 MW | 1 | 2025 |
| Somers Solar Center, LLC | Tolland | 5.0 MW | 1 | 2013 |
| Southington Solar One | Hartford | 4.7 MW | 1 | 2022 |
| CMEEC - Norwich Stott St Solar Hybrid | New London | 4.3 MW | 2 | 2016 |
| CMEEC - Polaris Park Solar Hybrid | New London | 4.3 MW | 2 | 2017 |
| Antares-GRE 314 East Lyme LLC | New London | 4.0 MW | 1 | 2014 |
| East Windsor | Hartford | 4.0 MW | 1 | 2025 |
| East Windsor Solar Two | Hartford | 4.0 MW | 1 | 2025 |
| Enfield Solar One | Hartford | 4.0 MW | 1 | 2024 |
| Norfolk Landfill Solar Project | Litchfield | 4.0 MW | 1 | 2024 |
| Raffia Road Solar Project | Hartford | 4.0 MW | 1 | 2024 |
| Stafford Solar One | Tolland | 4.0 MW | 1 | 2026 |
| Amazon BDL4 | Hartford | 3.9 MW | 1 | 2025 |
| Burlington Solar 1 | Hartford | 3.5 MW | 1 | 2022 |
| Brass Mill Center | New Haven | 3.4 MW | 1 | 2017 |
| Bristol Solar One, LLC | Hartford | 3.0 MW | 1 | 2021 |
| Glastonbury Solar One | Hartford | 3.0 MW | 1 | 2025 |
| Town of Rocky Hill PV CSG | Hartford | 3.0 MW | 3 | 2018 |
| Windsor Solar One | Hartford | 3.0 MW | 1 | 2025 |
| Woodstock Solar One | Windham | 3.0 MW | 1 | 2026 |
| Niagara Bottling - Bloomfield | Hartford | 2.8 MW | 1 | 2022 |
| Becton Dickinson Ground & Roof Top | Litchfield | 2.5 MW | 3 | 2018 |
| CMEEC - Bozrah | New London | 2.5 MW | 1 | 2016 |
| Barrow Solar | Tolland | 2.0 MW | 1 | 2021 |
| Bilton Solar | Tolland | 2.0 MW | 1 | 2023 |
| Bunce | Litchfield | 2.0 MW | 1 | 2022 |
| CP East Hampton I & II Solar | Middlesex | 2.0 MW | 1 | 2021 |
| CTGB Maloney and Webster | Tolland | 2.0 MW | 1 | 2025 |
| CTGB Manson Youth | New Haven | 2.0 MW | 1 | 2024 |
| Canis Major Solar Farm | Hartford | 2.0 MW | 1 | 2016 |
| Dickinson Solar (CT) | Windham | 2.0 MW | 1 | 2020 |
| Ellington - 277 Sadds Mill | Tolland | 2.0 MW | 1 | 2024 |
| Norcap North | Hartford | 2.0 MW | 1 | 2017 |
| Norcap South | Hartford | 2.0 MW | 1 | 2017 |
| Platt Hill | Litchfield | 2.0 MW | 1 | 2022 |
| Powder Hill | Hartford | 2.0 MW | 1 | 2020 |
| Sand Road | Litchfield | 2.0 MW | 1 | 2021 |
| Stafford MS Ground Mount Community Solar | Tolland | 2.0 MW | 2 | 2016 |
| Sydney Solar | Windham | 2.0 MW | 1 | 2020 |
| Torrington Solar One, LLC | Litchfield | 2.0 MW | 1 | 2021 |
| Watertown Solar One, LLC | Litchfield | 2.0 MW | 1 | 2021 |
| CTGB Osborn | Tolland | 1.8 MW | 1 | 2024 |
| Mansfield Landfill | Tolland | 1.8 MW | 1 | 2026 |
| Barrett Farm Solar - Phase I | Windham | 1.7 MW | 1 | 2017 |
| Emerald Gardens PKI, LLC | Fairfield | 1.6 MW | 2 | 2021 |
| North Haven Solar One | New Haven | 1.6 MW | 1 | 2024 |
| Dynamic Energy CT STAG | New Haven | 1.5 MW | 1 | 2023 |
| FedEx Middletown | Middlesex | 1.5 MW | 1 | 2024 |
| CMEEC - Rogers Rd Solar | New London | 1.3 MW | 1 | 2017 |
| ALDI DC 2 | Hartford | 1.2 MW | 1 | 2018 |
| New Britain - 142 Deming Rd | Hartford | 1.2 MW | 1 | 2025 |
| IKEA New Haven Rooftop PV & Fuel Cell | New Haven | 1.1 MW | 2 | 2012 |
| Town of Branford | New Haven | 1.1 MW | 1 | 2018 |
| Adams Solar | New London | 1.0 MW | 1 | 2018 |
| Advance Stores Company, Inc | Hartford | 1.0 MW | 1 | 2014 |
| Amazon BDL3 Solar Project | New Haven | 1.0 MW | 1 | 2019 |
| Benz Solar 1 | New Haven | 1.0 MW | 1 | 2025 |
| Benz Solar 2 | New Haven | 1.0 MW | 1 | 2025 |
| Blair Solar | Tolland | 1.0 MW | 1 | 2021 |
| CMEEC - Navy NE Trident | New London | 1.0 MW | 1 | 2017 |
| CP Middletown Solar I LLC | Middlesex | 1.0 MW | 1 | 2019 |
| CP Middletown Solar II LLC | Middlesex | 1.0 MW | 1 | 2019 |
| Canis Minor Solar Farm | Litchfield | 1.0 MW | 1 | 2016 |
| Clinton Solar | New London | 1.0 MW | 1 | 2021 |
| Conn Mun Electric Energy Coop | New London | 1.0 MW | 1 | 2016 |
| Corbin Russwin Phase 3 Berlin | Hartford | 1.0 MW | 1 | 2018 |
| Few Solar | Tolland | 1.0 MW | 1 | 2021 |
| Franklin Solar (CT) | New London | 1.0 MW | 1 | 2018 |
| Hamilton Solar | New London | 1.0 MW | 1 | 2018 |
| Hartford Landfill Solar EGF | Hartford | 1.0 MW | 1 | 2014 |
| Jackson Solar (CT) | New London | 1.0 MW | 1 | 2019 |
| Jefferson Solar (CT) | New London | 1.0 MW | 1 | 2018 |
| Madison Solar (CT) | Tolland | 1.0 MW | 1 | 2021 |
| Manchester Community College East | Hartford | 1.0 MW | 1 | 2018 |
| Manchester Community College North | Hartford | 1.0 MW | 1 | 2018 |
| McHenry Solar | Windham | 1.0 MW | 1 | 2021 |
| Park Solar | New Haven | 1.0 MW | 1 | 2023 |
| Plainfield Solar 1 | Windham | 1.0 MW | 1 | 2020 |
| Plainfield Solar 2 | Windham | 1.0 MW | 1 | 2020 |
| Sherman Solar | New London | 1.0 MW | 1 | 2019 |
| Ticket Network South Windsor | Hartford | 1.0 MW | 1 | 2018 |
| Wilson Solar (CT) | New London | 1.0 MW | 1 | 2018 |
Hydro15 plants · 168 MW
All US hydro plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Shepaug | New Haven | 37 MW | 1 | 1955 |
| Rocky River (CT) | Litchfield | 31 MW | 3 | 1928 |
| Stevenson | Fairfield | 31 MW | 4 | 1919 |
| Tunnel | New London | 21 MW | 3 | 1919 |
| Falls Village | Litchfield | 9.0 MW | 3 | 1914 |
| Derby Hydro | Fairfield | 8.6 MW | 4 | 1989 |
| Rainbow (CT) | Hartford | 8.0 MW | 2 | 1925 |
| Bulls Bridge | Litchfield | 7.2 MW | 6 | 1903 |
| Goodwin Hydroelectric | Hartford | 3.2 MW | 2 | 1986 |
| Wyre Wynd Hydroelectric Project | New London | 2.8 MW | 2 | 1984 |
| Quinebaug Lower Project | Windham | 2.5 MW | 4 | 1990 |
| Kinneytown New Old | New Haven | 2.3 MW | 2 | 1986 |
| Scotland Dam | Windham | 2.0 MW | 1 | 1937 |
| Taftville | New London | 1.6 MW | 5 | 1906 |
| Tenth Street | New London | 1.4 MW | 1 | 1967 |
Wind1 plant · 5.0 MW
All US wind plants →| Plant | County | Capacity | Units | Online |
|---|---|---|---|---|
| Wind Colebrook South | Litchfield | 5.0 MW | 1 | 2015 |
Sorted by nameplate capacity within each fuel. “Online” is the year the plant’s earliest surviving unit entered service.
Frequently asked questions
›How many power plants are there in Connecticut?
Connecticut has 186 operable power plants with a combined nameplate capacity of 11 GW, the 40th largest generating fleet of the 50 states and DC. 184 of them are currently in service.
›What is the largest power plant in Connecticut?
Millstone in New London County, a nuclear plant with 2,260 MW of capacity across 2 generating units, first online in December 1975.
›What fuel do Connecticut's power plants use?
Natural gas accounts for the largest share of Connecticut's generating capacity — 4,963 MW, or 45.1% of the total, across 48 plants. Other follows at 28.2%, Nuclear follows at 20.5%, Solar follows at 4.6%. Note this is capacity, not generation — what the fleet could produce, not what it did.
›What is the oldest power plant in Connecticut?
Bulls Bridge is the oldest still operable, with its earliest unit entering service in January 1903. The most recent addition is Mansfield Landfill, online since June 2026.