Power Plants in Connecticut

Connecticut operates 201 power plants totaling 11,216 MW of nameplate capacity. Natural Gas dominates the mix at 53%, followed by Nuclear (20%) and Oil (19%). The largest plant is Millstone at 2,259 MW.

Plants201operating sites
Capacity11,216 MWnameplate
Generation40.7M MWhannual
CO₂10.9Mmetric tons/year
Natural Gas 53%Nuclear 20%Oil 19%Solar 4%

Plant locations

Showing the 120 largest plants by capacity. Connecticut operates another 81 plants below this size — browse the lists below to reach them.

Largest plants in Connecticut

PlantCityFuelCapacity
MillstoneWaterfordNuclear2,260 MW
MiddletownMiddletownNatural Gas1,028 MW
Cpv Towantic Energy CenterOxfordNatural Gas842 MW
Lake Road Generating PlantDayvilleNatural Gas840 MW
Kleen Energy Systems ProjectMiddletownNatural Gas693 MW
New Haven HarborNew HavenOil642 MW
Milford Power ProjectMilfordNatural Gas578 MW
Bridgeport StationBridgeportNatural Gas576 MW
Bridgeport Energy ProjectBridgeportNatural Gas520 MW
Montville StationUncasvilleOil495 MW
Wallingford EnergyWallingfordNatural Gas350 MW
Genconn Middletown LlcMiddletownOil242 MW
Genconn Devon LlcMilfordOil242 MW
Devon StationMilfordOil223 MW
Gravel Pit Solar, LlcEast WindsorSolar120 MW
Cos CobGreenwichOil115 MW
Waterbury GenerationWaterburyNatural Gas96.0 MW
A L PierceWallingfordNatural Gas84.0 MW
Algonquin Windsor LocksWindsor LocksNatural Gas71.0 MW
Waterside Power, LlcStamfordOil69.6 MW
Wheelabrator BridgeportBridgeportBiomass67.0 MW
Quinebaug SolarCanterburySolar49.4 MW
Plainfield Renewable Energy LlcPlainfieldBiomass43.0 MW
Pfizer Groton PlantGrotonNatural Gas37.5 MW
ShepaugSouthburyHydroelectric37.2 MW
Dww Solar LlSimsburySolar36.9 MW
Kimberly Clark-Unit 1,2,3New MilfordNatural Gas36.3 MW
Rocky River (Ct)New MilfordHydroelectric31.0 MW
StevensonMonroeHydroelectric30.5 MW
Pratt & WhitneyEast HartfordNatural Gas25.8 MW
Uconn Cogen FacilityStorrsNatural Gas25.7 MW
BranfordBranfordOil21.8 MW
Franklin DriveTorringtonOil21.8 MW
Torrington TerminalTorringtonOil21.8 MW
TunnelPrestonHydroelectric20.5 MW
Fusion Solar Center LlcBalticSolar20.0 MW
Woods Hill SolarPomfretSolar20.0 MW
Nutmeg SolarEnfieldSolar19.6 MW
North Main StreetNorwichOil19.0 MW
Covanta Southeastern Connecticut CompanyPrestonBiomass18.3 MW
Bridgeport Fuel Cell, LlcBridgeportNatural Gas16.6 MW
Rand Whitney Chp PlantMontvilleNatural Gas16.5 MW
Covanta Bristol EnergyBristolBiomass16.3 MW
Foxwoods CogenMashantucketNatural Gas16.2 MW
Wallingford SolarWallingfordSolar16.1 MW
North Stonington Solar Center, LlcNorth StoningtonSolar15.0 MW
Wheelabrator LisbonLisbonBiomass14.6 MW
Derby Fuel CellDerbyNatural Gas14.0 MW
Sr North StoningtonNorth StoningtonSolar12.0 MW
Hartford Hospital CogenerationHartfordNatural Gas11.8 MW

By county

New Haven County31 plants · 3,170 MWNew London County46 plants · 3,059 MWMiddlesex County13 plants · 1,972 MWFairfield County20 plants · 1,456 MWWindham County17 plants · 970 MWHartford County45 plants · 391 MWLitchfield County18 plants · 151 MWTolland County11 plants · 43 MW