Summary of Electricity Activity in Connecticut

Summary of Connecticut Generation

Connecticut is ranked #32 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 May 2026.

Companies on File	139
Plants on File	233
Total Generation	3.39G MMBtu
Total Sales	1.95G kWh
Total Revenue	$455.17M

Map of Top Producing Cities in the Connecticut

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Overall National Rank

#32 /51 U.S. States

In Net Annual Generation

Overall Annual Net Geneneration

45.5 TWh

Total Annual Fuel Consumption

420.8 M MMBtu

Electric Companies in Connecticut

139

Connecticut
Power Plants

233

Natural Gas Rank

#18

Coal Rank

#44

Nuclear Rank

#20

Hydroelectric Rank

#41

Wind Rank

#42

Solar Rank

#29

Monthly Net Generation for Connecticut

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Monthly Plant Fuel Consumption for Connecticut

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Electricity Sales Distribution

Electricity Sales, Price, and Revenue Breakdown

	Sales	Price (Avg)	Revenue
Residential	859.92M kWh	27.37 cents/kWh	$235.38M
Commercial	878.39M kWh	21.08 cents/kWh	$185.18M
Industrial	195.70M kWh	16.76 cents/kWh	$32.79M
Transportation	12.50M kWh	14.55 cents/kWh	$1.82M
Total	1.95G kWh	23.38 cents/kWh	$455.17M

* Data is aggregated from Jan 2001 to May 2026.

Production by Source for Connecticut

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Largest 24 Power Plants in Connecticut

Rank	Plant	Utility	Location	Annual Generation	Initial Operation Date	Last Update	Fuel Types
#13	Algonquin Windsor Locks	Ahlstrom Power Windsor Locks LLC	Windsor Locks, Connecticut	146.9 GWh	Dec 1989	May 2026	Natural Gas : 92.2% Distillate Fuel Oil : 7.8%
#7	Bridgeport Energy Project	Bridgeport Energy LLC	Bridgeport, Connecticut	2.7 TWh	May 1998	May 2026	Natural Gas
#23	Bridgeport Fuel Cell, LLC	Bridgeport Fuel Cell, LLC	Bridgeport, Connecticut	90.4 GWh	Nov 2013	Dec 2025	Natural Gas
#5	Bridgeport Station	Generation Bridge II Connecticut, LLC	Bridgeport, Connecticut	3.2 TWh	Jul 1961	May 2026	Natural Gas : 84.6% Distillate Fuel Oil : 15.4%
#18	Covanta Bristol Energy	Covanta Bristol Inc	Bristol, Connecticut	108.5 GWh	Nov 1987	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
#19	Covanta Southeastern Connecticut Company	Covanta Southeastern Connecticut Company	Preston, Connecticut	108.5 GWh	Nov 1991	May 2026	Non-biogenic Municipal Solid Waste : 53.9% Biogenic Municipal Solid Waste : 44.1% Distillate Fuel Oil : 2.1%
#3	CPV Towantic Energy Center	CPV Towantic, LLC	Oxford, Connecticut	5.5 TWh	Apr 2018	May 2026	Natural Gas
#17	Derby Fuel Cell	Derby Fuel Cell LLC	Derby, Connecticut	110.3 GWh	Dec 2023	Dec 2025	Natural Gas
#11	Gravel Pit Solar, LLC	Gravel Pit Solar, LLC	East Windsor, Connecticut	186.8 GWh	Jan 2025	May 2026	Solar
#10	Kimberly Clark-Unit 1,2,3	Kimberly-Clark Corporation	New Milford, Connecticut	233.3 GWh	Mar 2008	Dec 2025	Natural Gas
#4	Kleen Energy Systems	Kleen Energy Systems, LLC	Middletown, Connecticut	3.7 TWh	Jun 2011	May 2026	Natural Gas : 97.9% Distillate Fuel Oil : 2.1%
#2	Lake Road Generating Plant	Lake Road Generating Co LP	Dayville, Connecticut	5.9 TWh	Feb 2002	May 2026	Natural Gas
#6	Milford Power Project	Milford Power Co LLC	Milford, Connecticut	3.2 TWh	Jan 2004	May 2026	Natural Gas
#1	Millstone	Dominion Energy Nuclear Conn Inc	Waterford, Connecticut	17.2 TWh	Nov 1975	May 2026	Nuclear
#14	Montville Station	Montville Power LLC	Uncasville, Connecticut	133.2 GWh	Dec 1953	Dec 2025	Residual Fuel Oil : 74.2% Natural Gas : 24.9% Distillate Fuel Oil : 0.9%
#12	New Haven Steam	Generation Bridge II Connecticut, LLC	New Haven, Connecticut	167.4 GWh	Jun 1975	Jan 2026	Residual Fuel Oil : 45.1% Natural Gas : 40.3% Distillate Fuel Oil : 12.2% Kerosene : 2.5%
#9	Plainfield Renewable Energy LLC	Plainfield Renewable Energy, LLC	Plainfield, Connecticut	245.1 GWh	Nov 2013	Dec 2025	Wood/Wood Waste Solids : 99.3% Other Biomass Liquids : 0.7%
#24	Pratt & Whitney	United Technologies	East Hartford, Connecticut	75.9 GWh	Dec 1991	May 2026	Natural Gas
#15	Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, Connecticut	131.8 GWh	Mar 2005	May 2026	Natural Gas
#22	Shepaug	FirstLight Power Resources Services LLC	Southbury, Connecticut	93.3 GWh	Dec 1954	Dec 2025	Water
#16	UCONN Cogen Facility	University of Connecticut	Storrs, Connecticut	112.1 GWh	Feb 2006	May 2026	Natural Gas : 95.2% Distillate Fuel Oil : 4.8%
#20	Wallingford Energy	Wallingford Energy LLC	Wallingford, Connecticut	107.0 GWh	Jul 2001	Dec 2025	Natural Gas
#8	Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, Connecticut	429.8 GWh	Jun 1988	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
#21	Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, Connecticut	100.8 GWh	Sep 1995	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%

* Data is based on the last 12 months since May 2026.

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Electricity Generation by Connecticut Counties

State Rank	County	# Power Plants	Net Generation Past 12 Months	Net Generation from Natural Gas	Net Generation from Wind	Net Generation from Solar	Net Generation from Nuclear
#7	Capitol Planning Region, CT	61	853.4 GWh	495.4 GWh	0.0 Wh	319.3 GWh	0.0 Wh
#2	Greater Bridgeport Planning Region, CT	10	6.7 TWh	5.7 TWh	0.0 Wh	2.7 GWh	0.0 Wh
#5	Lower Connecticut River Valley Planning Region, CT	16	3.8 TWh	3.7 TWh	0.0 Wh	54.7 GWh	0.0 Wh
#4	Naugatuck Valley Planning Region, CT	17	5.9 TWh	5.7 TWh	0.0 Wh	15.6 GWh	0.0 Wh
#3	Northeastern Connecticut Planning Region, CT	17	6.2 TWh	5.9 TWh	0.0 Wh	107.7 GWh	0.0 Wh
#9	Northwest Hills Planning Region, CT	15	98.0 GWh	0.0 Wh	10.5 GWh	53.4 GWh	0.0 Wh
#6	South Central Connecticut Planning Region, CT	23	3.6 TWh	3.5 TWh	0.0 Wh	26.2 GWh	0.0 Wh
#1	Southeastern Connecticut Planning Region, CT	52	18.1 TWh	441.9 GWh	0.0 Wh	116.6 GWh	17.2 TWh
#8	Western Connecticut Planning Region, CT	15	246.3 GWh	221.1 GWh	0.0 Wh	0.0 Wh	0.0 Wh

* Net Generation data is based on the last 12 months since May 2026.

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Top 20 Electricity Producing Cities in Connecticut

City	Net Generation	# Power Plants
Baltic, Connecticut	138.6 GWh	2
Bridgeport, Connecticut	6.5 TWh	6
Bristol, Connecticut	119.2 GWh	3
Broad Brook, Connecticut	215.8 GWh	9
Dayville, Connecticut	5.9 TWh	3
Derby, Connecticut	110.3 GWh	1
East Hartford, Connecticut	126.5 GWh	4
Gales Ferry, Connecticut	133.2 GWh	1
Groton, Connecticut	181.3 GWh	8
Middletown, Connecticut	3.8 TWh	8
Milford city (balance), Connecticut	3.2 TWh	1
Naugatuck, Connecticut	5.5 TWh	1
New Haven, Connecticut	193.8 GWh	5
New Milford, Connecticut	259.2 GWh	4
Oxoboxo River, Connecticut	245.2 GWh	4
Plainfield Village, Connecticut	248.1 GWh	3
Storrs, Connecticut	112.1 GWh	1
Wallingford Center, Connecticut	122.4 GWh	3
Waterford, Connecticut	17.2 TWh	1
Windsor Locks, Connecticut	183.7 GWh	4

* Data is based on the last 12 months since May 2026.

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Electricity Generation for Neighboring States

National Rank	State	Net Generation	# Power Plants
#49	Delaware	5.5 TWh	54
#51	District of Columbia	194.5 GWh	25
#14	Indiana	107.9 TWh	289
#22	Kentucky	73.5 TWh	103
#45	Maine	15.1 TWh	314
#38	Maryland	38.8 TWh	277
#41	Massachusetts	21.9 TWh	760
#11	Michigan	125.2 TWh	406
#44	New Hampshire	18.5 TWh	76
#27	New Jersey	61.9 TWh	512
#10	New York	130.8 TWh	1,371
#9	North Carolina	136.7 TWh	1,151
#6	Ohio	150.5 TWh	326
#3	Pennsylvania	243.7 TWh	418
#46	Rhode Island	10.0 TWh	119
#17	South Carolina	102.4 TWh	307
#19	Tennessee	81.8 TWh	139
#50	Vermont	2.0 TWh	144
#16	Virginia	105.4 TWh	354
#30	West Virginia	54.9 TWh	69

* Net Generation data is based on the last 12 months since May 2026.