Summary of Electricity Activity in Connecticut

Summary of Connecticut Generation

Connecticut is ranked #34 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 Oct 2025.

Companies on File	137
Plants on File	227
Total Generation	3.18G MMBtu
Total Sales	1.98G kWh
Total Revenue	$457.29M

Map of Top Producing Cities in the Connecticut

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Overall National Rank

#34 /51 U.S. States

In Net Annual Generation

Overall Annual Net Geneneration

43.6 TWh

Total Annual Fuel Consumption

409.3 M MMBtu

Electric Companies in Connecticut

137

Connecticut
Power Plants

227

Natural Gas Rank

#23

Coal Rank

#47

Nuclear Rank

#18

Hydroelectric Rank

#41

Wind Rank

#42

Solar Rank

#31

Monthly Net Generation for Connecticut

Electricity Sales Distribution

Electricity Sales, Price, and Revenue Breakdown

	Sales	Price (Avg)	Revenue
Residential	837.43M kWh	27.72 cents/kWh	$232.13M
Commercial	894.21M kWh	21.58 cents/kWh	$193.00M
Industrial	230.39M kWh	12.98 cents/kWh	$29.91M
Transportation	13.59M kWh	16.56 cents/kWh	$2.25M
Total	1.98G kWh	23.15 cents/kWh	$457.29M

* Data is aggregated from Jan 2001 to Oct 2025.

Production by Source

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	124.5 GWh	Dec 1989	Oct 2025	Natural Gas : 99.9%
#7	Bridgeport Energy Project	Bridgeport Energy LLC	Bridgeport, Connecticut	2.4 TWh	May 1998	Oct 2025	Natural Gas
#20	Bridgeport Fuel Cell, LLC	Bridgeport Fuel Cell, LLC	Bridgeport, Connecticut	96.8 GWh	Nov 2013	Dec 2024	Natural Gas
#5	Bridgeport Station	Generation Bridge II Connecticut, LLC	Bridgeport, Connecticut	3.4 TWh	Jul 1961	Oct 2025	Natural Gas : 98.6% Distillate Fuel Oil : 1.4%
#17	Covanta Bristol Energy	Covanta Bristol Inc	Bristol, Connecticut	108.8 GWh	Nov 1987	Oct 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
#16	Covanta Southeastern Connecticut Company	Covanta Southeastern Connecticut Company	Preston, Connecticut	115.5 GWh	Nov 1991	Oct 2025	Non-biogenic Municipal Solid Waste : 54.1% Biogenic Municipal Solid Waste : 44.2% Distillate Fuel Oil : 1.7%
#3	CPV Towantic Energy Center	CPV Towantic, LLC	Oxford, Connecticut	5.0 TWh	Apr 2018	Oct 2025	Natural Gas
#18	Derby Fuel Cell	Derby Fuel Cell LLC	Derby, Connecticut	105.9 GWh	Dec 2023	Dec 2024	Natural Gas
#12	Gravel Pit Solar, LLC	Gravel Pit Solar, LLC	East Windsor, Connecticut	129.3 GWh	-	Oct 2025	Solar
#10	Kimberly Clark-Unit 1,2,3	Kimberly-Clark Corporation	New Milford, Connecticut	219.0 GWh	Mar 2008	Dec 2024	Natural Gas
#6	Kleen Energy Systems Project	Kleen Energy Systems, LLC	Middletown, Connecticut	3.0 TWh	Jun 2011	Oct 2025	Natural Gas : 99.2% Distillate Fuel Oil : 0.8%
#2	Lake Road Generating Plant	Lake Road Generating Co LP	Dayville, Connecticut	5.8 TWh	Feb 2002	Oct 2025	Natural Gas
#4	Milford Power Project	Milford Power Co LLC	Milford, Connecticut	3.6 TWh	Jan 2004	Oct 2025	Natural Gas
#1	Millstone	Dominion Energy Nuclear Conn Inc	Waterford, Connecticut	16.5 TWh	Nov 1975	Oct 2025	Nuclear
#22	New Haven Harbor	Generation Bridge II Connecticut, LLC	New Haven, Connecticut	92.5 GWh	Jun 1975	Sep 2025	Natural Gas : 72.8% Residual Fuel Oil : 17.4% Distillate Fuel Oil : 6.4% Kerosene : 3.3%
#9	Plainfield Renewable Energy LLC	Plainfield Renewable Energy, LLC	Plainfield, Connecticut	247.0 GWh	Nov 2013	Oct 2024	Wood/Wood Waste Solids : 99.5% Other Biomass Liquids : 0.5%
#24	Pratt & Whitney	United Technologies	East Hartford, Connecticut	84.1 GWh	Dec 1991	Oct 2025	Natural Gas
#11	Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, Connecticut	133.3 GWh	Mar 2005	Oct 2025	Natural Gas
#15	Shepaug	FirstLight Power Resources Services LLC	Southbury, Connecticut	116.6 GWh	Dec 1954	Dec 2024	Water
#21	Stevenson	FirstLight Power Resources Services LLC	Monroe, Connecticut	95.8 GWh	Dec 1918	Dec 2024	Water
#14	UCONN Cogen Facility	University of Connecticut	Storrs, Connecticut	123.7 GWh	Feb 2006	Oct 2025	Natural Gas : 98.6% Distillate Fuel Oil : 1.4%
#23	Wallingford Energy	Wallingford Energy LLC	Wallingford, Connecticut	87.8 GWh	Jul 2001	Dec 2024	Natural Gas
#8	Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, Connecticut	469.3 GWh	Jun 1988	Oct 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
#19	Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, Connecticut	102.0 GWh	Sep 1995	Oct 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%

* Data is based on the last 12 months since Oct 2025.

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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	56	778.6 GWh	514.3 GWh	0.0 Wh	242.7 GWh	0.0 Wh
#2	Greater Bridgeport Planning Region, CT	10	6.6 TWh	6.0 TWh	0.0 Wh	3.1 GWh	0.0 Wh
#6	Lower Connecticut River Valley Planning Region, CT	16	3.1 TWh	3.0 TWh	0.0 Wh	54.7 GWh	0.0 Wh
#4	Naugatuck Valley Planning Region, CT	17	5.4 TWh	5.1 TWh	0.0 Wh	9.9 GWh	0.0 Wh
#3	Northeastern Connecticut Planning Region, CT	17	6.2 TWh	5.9 TWh	0.0 Wh	117.1 GWh	0.0 Wh
#9	Northwest Hills Planning Region, CT	15	72.2 GWh	0.0 Wh	11.2 GWh	21.8 GWh	0.0 Wh
#5	South Central Connecticut Planning Region, CT	23	3.9 TWh	3.8 TWh	0.0 Wh	30.6 GWh	0.0 Wh
#1	Southeastern Connecticut Planning Region, CT	51	17.3 TWh	445.9 GWh	0.0 Wh	115.6 GWh	16.5 TWh
#8	Western Connecticut Planning Region, CT	15	178.5 GWh	205.8 GWh	0.0 Wh	0.0 Wh	0.0 Wh

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

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Top 20 Electricity Producing Cities in Connecticut

City	Net Generation	# Power Plants
Baltic, Connecticut	142.2 GWh	2
Bridgeport, Connecticut	6.4 TWh	5
Bristol, Connecticut	119.2 GWh	3
Broad Brook, Connecticut	157.8 GWh	7
Dayville, Connecticut	5.9 TWh	3
Derby, Connecticut	105.9 GWh	1
East Hartford, Connecticut	135.0 GWh	4
Groton, Connecticut	196.7 GWh	8
Middletown, Connecticut	3.1 TWh	8
Milford city (balance), Connecticut	3.6 TWh	1
Naugatuck, Connecticut	5.0 TWh	1
New Haven, Connecticut	111.0 GWh	5
New Milford, Connecticut	251.2 GWh	4
Newtown, Connecticut	116.6 GWh	1
Oxoboxo River, Connecticut	253.6 GWh	4
Plainfield Village, Connecticut	249.9 GWh	3
Storrs, Connecticut	123.7 GWh	1
Wallingford Center, Connecticut	108.6 GWh	3
Waterford, Connecticut	16.5 TWh	1
Windsor Locks, Connecticut	156.0 GWh	3

* Data is based on the last 12 months since Oct 2025.

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Electricity Generation for Neighboring States

National Rank	State	Net Generation	# Power Plants
#49	Delaware	5.1 TWh	47
#51	District of Columbia	175.8 GWh	24
#13	Indiana	107.8 TWh	285
#22	Kentucky	71.6 TWh	98
#45	Maine	15.0 TWh	301
#39	Maryland	37.5 TWh	268
#41	Massachusetts	24.0 TWh	736
#11	Michigan	126.2 TWh	387
#44	New Hampshire	18.1 TWh	74
#29	New Jersey	59.3 TWh	481
#10	New York	128.2 TWh	1,281
#9	North Carolina	134.7 TWh	1,131
#6	Ohio	145.4 TWh	313
#3	Pennsylvania	245.9 TWh	390
#46	Rhode Island	10.0 TWh	116
#14	South Carolina	104.4 TWh	304
#21	Tennessee	72.8 TWh	137
#50	Vermont	2.3 TWh	142
#15	Virginia	104.3 TWh	345
#31	West Virginia	51.1 TWh	66

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