Summary of Electricity Activity in Connecticut

Summary of Connecticut Generation

Connecticut is ranked #35 out of 51 U.S. states and territories in terms of total annual net electricity generation. electricity generation data is aggregated from Jan 2001 to Apr 2024.

Companies on File131
Plants on File212
Total Generation3.24G MMBtu
Total Sales 1.92G kWh
Total Revenue $466.42M

Map of Top Producing Cities in the Connecticut

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Overall National Rank

#35 /51 U.S. States

In Net Annual Generation

Overall Annual Net Geneneration

43.3 TWh

Total Annual Fuel Consumption

375.1 M MMBtu

Electric Companies in Connecticut


Power Plants


Natural Gas Rank


Coal Rank


Nuclear Rank


Hydroelectric Rank


Wind Rank


Solar Rank


Monthly Net Generation for Connecticut

Electricity Sales Distribution

Electricity Sales, Price, and Revenue Breakdown

SalesPrice (Avg)Revenue
Residential878.39M kWh29.58 cents/kWh$259.87M
Commercial823.09M kWh20.82 cents/kWh$171.33M
Industrial206.86M kWh15.90 cents/kWh$32.89M
Transportation14.61M kWh16.04 cents/kWh$2.34M
Total1.92G kWh24.26 cents/kWh$466.42M

Production by Source

Largest 24 Power Plants in Connecticut

RankPlantUtilityLocationAnnual GenerationInitial Operation DateLast UpdateFuel Types
#14Algonquin Windsor LocksAlgonquin Windsor Locks LLCWindsor Locks, Connecticut126.1 GWhDec 1989Apr 2024 Natural Gas : 99.7%
#7Bridgeport Energy ProjectBridgeport Energy LLCBridgeport, Connecticut2.6 TWhMay 1998Apr 2024 Natural Gas
#16Bridgeport Fuel Cell, LLCBridgeport Fuel Cell, LLCBridgeport, Connecticut120.4 GWhNov 2013Dec 2022 Natural Gas
#5Bridgeport StationGeneration Bridge II Connecticut, LLCBridgeport, Connecticut3.0 TWhJul 1961Apr 2024 Natural Gas : 99.3% Distillate Fuel Oil : 0.7%
#18Covanta Bristol EnergyCovanta Bristol IncBristol, Connecticut113.6 GWhNov 1987Apr 2024 Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
#15Covanta Southeastern Connecticut CompanyCovanta Southeastern Connecticut CompanyPreston, Connecticut124.5 GWhNov 1991Apr 2024 Non-biogenic Municipal Solid Waste : 53.9% Biogenic Municipal Solid Waste : 44.1% Distillate Fuel Oil : 2.0%
#2CPV Towantic Energy CenterCPV Towantic, LLCOxford, Connecticut6.1 TWhApr 2018Apr 2024 Natural Gas : 99.9%
#21Generate Colchester Fuel Cells, LLCGenerate Colchester Fuel Cells, LLCColchester, Connecticut83.8 GWhSep 2021Dec 2022 Natural Gas
#9Kimberly Clark-Unit 1,2,3Kimberly-Clark CorporationNew Milford, Connecticut256.5 GWhMar 2008Dec 2022 Natural Gas
#6Kleen Energy Systems ProjectKleen Energy Systems, LLCMiddletown, Connecticut2.8 TWhJun 2011Apr 2024 Natural Gas : 99.4% Distillate Fuel Oil : 0.6%
#3Lake Road Generating PlantLake Road Generating Co LPDayville, Connecticut6.1 TWhFeb 2002Apr 2024 Natural Gas
#10MiddletownMiddletown Power LLCMiddletown, Connecticut187.1 GWhSep 1958Dec 2022 Residual Fuel Oil : 69.9% Natural Gas : 29.9%
#4Milford Power ProjectMilford Power Co LLCMilford, Connecticut3.8 TWhJan 2004Apr 2024 Natural Gas
#1MillstoneDominion Energy Nuclear Conn IncWaterford, Connecticut15.0 TWhNov 1975Apr 2024 Nuclear
#20Montville StationNRG Montville Operations IncUncasville, Connecticut97.4 GWhDec 1953Dec 2022 Residual Fuel Oil : 78.4% Natural Gas : 20.4% Distillate Fuel Oil : 1.2%
#12Pratt & WhitneyUnited TechnologiesEast Hartford, Connecticut135.2 GWhDec 1991Apr 2024 Natural Gas : 99.8%
#22Quinebaug SolarQuinebaug Solar, LLCCanterbury, Connecticut83.7 GWhNov 2021Apr 2024 Solar
#11Rand Whitney CHP PlantRand Whitney Containerboard L.P.Montville, Connecticut137.9 GWhMar 2005Apr 2024 Natural Gas
#17ShepaugFirstLight Power Resources Services LLCSouthbury, Connecticut114.4 GWhDec 1954Dec 2022 Water
#24Sikorsky Aircraft CHPSikorsky Aircraft CorporationStratford, Connecticut77.0 GWhMay 2010Dec 2022 Natural Gas : 99.6%
#13UCONN Cogen FacilityUniversity of ConnecticutStorrs, Connecticut131.6 GWhFeb 2006Apr 2024 Natural Gas : 99.7%
#23Wallingford EnergyWallingford Energy LLCWallingford, Connecticut80.0 GWhJul 2001Dec 2022 Natural Gas
#8Wheelabrator BridgeportWheelabrator Environmental SystemsBridgeport, Connecticut484.4 GWhJun 1988Apr 2024 Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
#19Wheelabrator LisbonWheelabrator Environmental SystemsLisbon, Connecticut106.5 GWhSep 1995Apr 2024 Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%

Electricity Generation by Connecticut Counties

State RankCounty# Power PlantsNet Generation
Past 12 Months
Net Generation
from Natural Gas
Net Generation
from Wind
Net Generation
from Solar
Net Generation
from Nuclear
#7Capitol Planning Region, CT49741.7 GWh602.5 GWh0.0 Wh93.5 GWh0.0 Wh
#3Greater Bridgeport Planning Region, CT106.4 TWh5.9 TWh0.0 Wh752.4 MWh0.0 Wh
#6Lower Connecticut River Valley Planning Region, CT153.1 TWh2.9 TWh0.0 Wh50.7 GWh0.0 Wh
#2Naugatuck Valley Planning Region, CT136.4 TWh6.2 TWh0.0 Wh11.9 GWh0.0 Wh
#4Northeastern Connecticut Planning Region, CT176.3 TWh6.1 TWh0.0 Wh126.6 GWh0.0 Wh
#9Northwest Hills Planning Region, CT1575.7 GWh0.0 Wh10.3 GWh12.5 GWh0.0 Wh
#5South Central Connecticut Planning Region, CT224.0 TWh4.0 TWh0.0 Wh28.7 GWh0.0 Wh
#1Southeastern Connecticut Planning Region, CT5015.9 TWh403.1 GWh0.0 Wh83.8 GWh15.0 TWh
#8Western Connecticut Planning Region, CT14347.6 GWh288.4 GWh0.0 Wh0.0 Wh0.0 Wh

Top 20 Electricity Producing Cities in Connecticut

Electricity Generation for Neighboring States

National RankStateNet Generation# Power Plants
#49Delaware5.3 TWh42
#51District of Columbia200.6 GWh20
#18Indiana97.9 TWh266
#25Kentucky67.8 TWh84
#45Maine13.1 TWh262
#38Maryland38.8 TWh242
#41Massachusetts20.9 TWh695
#11Michigan128.5 TWh366
#43New Hampshire18.1 TWh74
#23New Jersey69.5 TWh470
#10New York135.6 TWh1,115
#9North Carolina140.2 TWh1,114
#7Ohio149.4 TWh289
#3Pennsylvania251.2 TWh365
#47Rhode Island9.1 TWh114
#14South Carolina109.5 TWh295
#19Tennessee86.6 TWh114
#50Vermont2.3 TWh138
#16Virginia101.3 TWh308
#31West Virginia55.4 TWh64

* Net Generation data is based on the last 12 months since Apr 2024