Summary of Electricity Activity in Connecticut

Summary of Connecticut Generation

Connecticut is ranked #33 out of 51 U.S. states and territories in terms of total annual net electricity generation.

GridInfo.com electricity generation data is aggregated from Jan 2001 to Apr 2025.

Companies on File136
Plants on File222
Total Generation2.83G MMBtu
Total Sales 1.91G kWh
Total Revenue $521.27M

Map of Top Producing Cities in the Connecticut

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Overall National Rank

#33 /51 U.S. States

In Net Annual Generation

Overall Annual Net Geneneration

44.8 TWh

Total Annual Fuel Consumption

422.4 M MMBtu

Electric Companies in Connecticut

136

Connecticut
Power Plants

222

Natural Gas Rank

#19

Coal Rank

#43

Nuclear Rank

#21

Hydroelectric Rank

#40

Wind Rank

#44

Solar Rank

#29

Monthly Net Generation for Connecticut

Electricity Sales Distribution

Sales Residential
Sales Commercial
Sales Industrial
Sales Transportation
44.8%43.3%11.2%

Electricity Sales, Price, and Revenue Breakdown

SalesPrice (Avg)Revenue
Residential854.38M kWh32.28 cents/kWh$275.81M
Commercial826.54M kWh24.46 cents/kWh$202.14M
Industrial214.49M kWh19.07 cents/kWh$40.90M
Transportation11.62M kWh20.83 cents/kWh$2.42M
Total1.91G kWh27.33 cents/kWh$521.27M

Production by Source

Largest 24 Power Plants in Connecticut

RankPlantUtilityLocationAnnual GenerationInitial Operation DateLast UpdateFuel Types
#14Algonquin Windsor LocksAhlstrom Power Windsor Locks LLCWindsor Locks, Connecticut118.4 GWhDec 1989Apr 2025 Natural Gas : 99.9%
#7Bridgeport Energy ProjectBridgeport Energy LLCBridgeport, Connecticut2.8 TWhMay 1998Apr 2025 Natural Gas
#21Bridgeport Fuel Cell, LLCBridgeport Fuel Cell, LLCBridgeport, Connecticut96.8 GWhNov 2013Dec 2024 Natural Gas
#5Bridgeport StationGeneration Bridge II Connecticut, LLCBridgeport, Connecticut3.6 TWhJul 1961Apr 2025 Natural Gas : 98.6% Distillate Fuel Oil : 1.4%
#18Covanta Bristol EnergyCovanta Bristol IncBristol, Connecticut105.1 GWhNov 1987Apr 2025 Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
#16Covanta Southeastern Connecticut CompanyCovanta Southeastern Connecticut CompanyPreston, Connecticut113.2 GWhNov 1991Apr 2025 Non-biogenic Municipal Solid Waste : 54.2% Biogenic Municipal Solid Waste : 44.4% Distillate Fuel Oil : 1.4%
#3CPV Towantic Energy CenterCPV Towantic, LLCOxford, Connecticut5.3 TWhApr 2018Apr 2025 Natural Gas
#17Derby Fuel CellDerby Fuel Cell LLCDerby, Connecticut105.9 GWhDec 2023Dec 2024 Natural Gas
#10Kimberly Clark-Unit 1,2,3Kimberly-Clark CorporationNew Milford, Connecticut219.0 GWhMar 2008Dec 2024 Natural Gas
#6Kleen Energy Systems ProjectKleen Energy Systems, LLCMiddletown, Connecticut3.3 TWhJun 2011Apr 2025 Natural Gas : 99.3% Distillate Fuel Oil : 0.7%
#2Lake Road Generating PlantLake Road Generating Co LPDayville, Connecticut5.8 TWhFeb 2002Apr 2025 Natural Gas
#11MiddletownMiddletown Power LLCMiddletown, Connecticut169.8 GWhSep 1958Dec 2023 Natural Gas : 79.3% Residual Fuel Oil : 20.7%
#4Milford Power ProjectMilford Power Co LLCMilford, Connecticut3.7 TWhJan 2004Apr 2025 Natural Gas
#1MillstoneDominion Energy Nuclear Conn IncWaterford, Connecticut16.5 TWhNov 1975Apr 2025 Nuclear
#9Plainfield Renewable Energy LLCPlainfield Renewable Energy, LLCPlainfield, Connecticut247.0 GWhNov 2013Oct 2024 Wood/Wood Waste Solids : 99.5%
#19Pratt & WhitneyUnited TechnologiesEast Hartford, Connecticut104.1 GWhDec 1991Apr 2025 Natural Gas
#24Quinebaug SolarQuinebaug Solar, LLCCanterbury, Connecticut81.2 GWhNov 2021Apr 2025 Solar
#12Rand Whitney CHP PlantRand Whitney Containerboard L.P.Montville, Connecticut133.2 GWhMar 2005Apr 2025 Natural Gas
#15ShepaugFirstLight Power Resources Services LLCSouthbury, Connecticut116.6 GWhDec 1954Dec 2024 Water
#22StevensonFirstLight Power Resources Services LLCMonroe, Connecticut95.8 GWhDec 1918Dec 2024 Water
#13UCONN Cogen FacilityUniversity of ConnecticutStorrs, Connecticut124.8 GWhFeb 2006Apr 2025 Natural Gas : 98.9% Distillate Fuel Oil : 1.1%
#23Wallingford EnergyWallingford Energy LLCWallingford, Connecticut87.8 GWhJul 2001Dec 2024 Natural Gas
#8Wheelabrator BridgeportWheelabrator Environmental SystemsBridgeport, Connecticut464.7 GWhJun 1988Apr 2025 Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
#20Wheelabrator LisbonWheelabrator Environmental SystemsLisbon, Connecticut102.1 GWhSep 1995Apr 2025 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, CT54682.7 GWh531.9 GWh0.0 Wh129.7 GWh0.0 Wh
#2Greater Bridgeport Planning Region, CT107.2 TWh6.6 TWh0.0 Wh2.4 GWh0.0 Wh
#6Lower Connecticut River Valley Planning Region, CT163.5 TWh3.4 TWh0.0 Wh59.4 GWh0.0 Wh
#4Naugatuck Valley Planning Region, CT155.7 TWh5.5 TWh0.0 Wh9.9 GWh0.0 Wh
#3Northeastern Connecticut Planning Region, CT176.2 TWh5.8 TWh0.0 Wh119.5 GWh0.0 Wh
#9Northwest Hills Planning Region, CT1566.6 GWh0.0 Wh10.7 GWh16.6 GWh0.0 Wh
#5South Central Connecticut Planning Region, CT233.9 TWh3.9 TWh0.0 Wh30.6 GWh0.0 Wh
#1Southeastern Connecticut Planning Region, CT5017.3 TWh442.3 GWh0.0 Wh115.5 GWh16.5 TWh
#8Western Connecticut Planning Region, CT15178.3 GWh205.8 GWh0.0 Wh0.0 Wh0.0 Wh

Top 20 Electricity Producing Cities in Connecticut

Electricity Generation for Neighboring States

National RankStateNet Generation# Power Plants
#49Delaware5.1 TWh46
#51District of Columbia180.9 GWh24
#16Indiana101.9 TWh281
#23Kentucky70.0 TWh98
#45Maine14.7 TWh297
#39Maryland36.3 TWh254
#41Massachusetts21.9 TWh732
#11Michigan128.8 TWh387
#44New Hampshire17.2 TWh74
#29New Jersey58.9 TWh478
#10New York129.4 TWh1,261
#9North Carolina136.0 TWh1,129
#7Ohio143.3 TWh309
#3Pennsylvania246.2 TWh384
#46Rhode Island9.9 TWh114
#15South Carolina103.7 TWh304
#21Tennessee71.9 TWh137
#50Vermont2.3 TWh141
#13Virginia104.5 TWh341
#31West Virginia51.8 TWh66

* Net Generation data is based on the last 12 months since Apr 2025