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 Aug 2025.
| Companies on File | 137 |
|---|---|
| Plants on File | 227 |
| Total Generation | 4.13G MMBtu |
| Total Sales | 2.48G kWh |
| Total Revenue | $660.05M |
Map of Top Producing Cities in the Connecticut
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Natural Gas Rank
#22
Coal Rank
#47
Nuclear Rank
#18
Hydroelectric Rank
#41
Wind Rank
#41
Solar Rank
#29
Monthly Net Generation for Connecticut
Electricity Sales Distribution
Electricity Sales, Price, and Revenue Breakdown
| Sales | Price (Avg) | Revenue | |
|---|---|---|---|
| Residential | 1.25G kWh | 30.29 cents/kWh | $378.53M |
| Commercial | 1.00G kWh | 23.78 cents/kWh | $238.39M |
| Industrial | 208.88M kWh | 19.07 cents/kWh | $39.84M |
| Transportation | 17.56M kWh | 18.67 cents/kWh | $3.28M |
| Total | 2.48G kWh | 26.63 cents/kWh | $660.05M |
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 | 119.4 GWh | Dec 1989 | Aug 2025 | Natural Gas : 99.9% |
| #7 | Bridgeport Energy Project | Bridgeport Energy LLC | Bridgeport, Connecticut | 2.6 TWh | May 1998 | Aug 2025 | Natural Gas |
| #19 | 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 | 3.6 TWh | Jul 1961 | Aug 2025 | Natural Gas : 98.6% Distillate Fuel Oil : 1.4% |
| #16 | Covanta Bristol Energy | Covanta Bristol Inc | Bristol, Connecticut | 108.2 GWh | Nov 1987 | Aug 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| #15 | Covanta Southeastern Connecticut Company | Covanta Southeastern Connecticut Company | Preston, Connecticut | 112.4 GWh | Nov 1991 | Aug 2025 | Non-biogenic Municipal Solid Waste : 54.0% 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 | Aug 2025 | Natural Gas |
| #17 | Derby Fuel Cell | Derby Fuel Cell LLC | Derby, Connecticut | 105.9 GWh | Dec 2023 | Dec 2024 | Natural Gas |
| #21 | Gravel Pit Solar, LLC | Gravel Pit Solar, LLC | East Windsor, Connecticut | 94.2 GWh | - | Aug 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 | 3.1 TWh | Jun 2011 | Aug 2025 | Natural Gas : 99.3% Distillate Fuel Oil : 0.7% |
| #2 | Lake Road Generating Plant | Lake Road Generating Co LP | Dayville, Connecticut | 5.8 TWh | Feb 2002 | Aug 2025 | Natural Gas |
| #4 | Milford Power Project | Milford Power Co LLC | Milford, Connecticut | 3.7 TWh | Jan 2004 | Aug 2025 | Natural Gas |
| #1 | Millstone | Dominion Energy Nuclear Conn Inc | Waterford, Connecticut | 15.9 TWh | Nov 1975 | Aug 2025 | Nuclear |
| #22 | New Haven Harbor | Generation Bridge II Connecticut, LLC | New Haven, Connecticut | 89.3 GWh | Jun 1975 | Aug 2025 | Natural Gas : 71.3% Residual Fuel Oil : 18.0% Distillate Fuel Oil : 6.6% Kerosene : 4.1% |
| #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 | Quinebaug Solar | Quinebaug Solar, LLC | Canterbury, Connecticut | 80.3 GWh | Nov 2021 | Aug 2025 | Solar |
| #11 | Rand Whitney CHP Plant | Rand Whitney Containerboard L.P. | Montville, Connecticut | 135.0 GWh | Mar 2005 | Aug 2025 | Natural Gas |
| #14 | Shepaug | FirstLight Power Resources Services LLC | Southbury, Connecticut | 116.6 GWh | Dec 1954 | Dec 2024 | Water |
| #20 | Stevenson | FirstLight Power Resources Services LLC | Monroe, Connecticut | 95.8 GWh | Dec 1918 | Dec 2024 | Water |
| #12 | UCONN Cogen Facility | University of Connecticut | Storrs, Connecticut | 123.0 GWh | Feb 2006 | Aug 2025 | Natural Gas : 98.9% Distillate Fuel Oil : 1.1% |
| #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 | 469.8 GWh | Jun 1988 | Aug 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| #18 | Wheelabrator Lisbon | Wheelabrator Environmental Systems | Lisbon, Connecticut | 101.5 GWh | Sep 1995 | Aug 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
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 | 734.0 GWh | 505.4 GWh | 0.0 Wh | 207.6 GWh | 0.0 Wh |
| #2 | Greater Bridgeport Planning Region, CT | 10 | 7.0 TWh | 6.3 TWh | 0.0 Wh | 3.2 GWh | 0.0 Wh |
| #6 | Lower Connecticut River Valley Planning Region, CT | 16 | 3.2 TWh | 3.1 TWh | 0.0 Wh | 58.4 GWh | 0.0 Wh |
| #4 | Naugatuck Valley Planning Region, CT | 17 | 5.4 TWh | 5.2 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 | 118.4 GWh | 0.0 Wh |
| #9 | Northwest Hills Planning Region, CT | 15 | 73.6 GWh | 0.0 Wh | 10.8 GWh | 23.5 GWh | 0.0 Wh |
| #5 | South Central Connecticut Planning Region, CT | 23 | 4.0 TWh | 3.9 TWh | 0.0 Wh | 30.6 GWh | 0.0 Wh |
| #1 | Southeastern Connecticut Planning Region, CT | 51 | 16.7 TWh | 449.8 GWh | 0.0 Wh | 115.0 GWh | 15.9 TWh |
| #8 | Western Connecticut Planning Region, CT | 15 | 178.7 GWh | 205.8 GWh | 0.0 Wh | 0.0 Wh | 0.0 Wh |
Top 20 Electricity Producing Cities in Connecticut
| City | Net Generation | # Power Plants |
|---|---|---|
| Baltic, Connecticut | 141.5 GWh | 2 |
| Bridgeport, Connecticut | 6.8 TWh | 6 |
| Bristol, Connecticut | 118.6 GWh | 3 |
| Broad Brook, Connecticut | 122.8 GWh | 7 |
| Dayville, Connecticut | 5.9 TWh | 3 |
| Derby, Connecticut | 105.9 GWh | 1 |
| East Hartford, Connecticut | 131.4 GWh | 4 |
| Groton, Connecticut | 198.2 GWh | 8 |
| Middletown, Connecticut | 3.2 TWh | 8 |
| Milford city (balance), Connecticut | 3.7 TWh | 1 |
| Naugatuck, Connecticut | 5.0 TWh | 1 |
| New Haven, Connecticut | 107.7 GWh | 5 |
| New Milford, Connecticut | 251.4 GWh | 4 |
| Newtown, Connecticut | 116.6 GWh | 1 |
| Oxoboxo River, Connecticut | 251.8 GWh | 4 |
| Plainfield Village, Connecticut | 249.9 GWh | 3 |
| Storrs, Connecticut | 123.0 GWh | 1 |
| Wallingford Center, Connecticut | 108.6 GWh | 3 |
| Waterford, Connecticut | 15.9 TWh | 1 |
| Windsor Locks, Connecticut | 150.7 GWh | 3 |
Electricity Generation for Neighboring States
| National Rank | State | Net Generation | # Power Plants |
|---|---|---|---|
| #49 | Delaware | 5.0 TWh | 47 |
| #51 | District of Columbia | 175.9 GWh | 24 |
| #14 | Indiana | 104.6 TWh | 285 |
| #22 | Kentucky | 70.5 TWh | 98 |
| #45 | Maine | 15.0 TWh | 301 |
| #39 | Maryland | 36.9 TWh | 268 |
| #41 | Massachusetts | 23.4 TWh | 736 |
| #11 | Michigan | 126.5 TWh | 387 |
| #44 | New Hampshire | 17.7 TWh | 74 |
| #29 | New Jersey | 59.1 TWh | 481 |
| #10 | New York | 128.7 TWh | 1,281 |
| #9 | North Carolina | 135.2 TWh | 1,130 |
| #6 | Ohio | 144.3 TWh | 313 |
| #3 | Pennsylvania | 245.8 TWh | 390 |
| #46 | Rhode Island | 9.9 TWh | 116 |
| #15 | South Carolina | 103.6 TWh | 304 |
| #21 | Tennessee | 71.7 TWh | 137 |
| #50 | Vermont | 2.3 TWh | 142 |
| #13 | Virginia | 106.3 TWh | 345 |
| #31 | West Virginia | 50.2 TWh | 66 |
* Net Generation data is based on the last 12 months since Aug 2025