ISO New England

Balancing Authority Summary Information

ISO New England is ranked #14 out of 65 balancing authorities in terms of total annual electricity generation.

Balancing Authority	ISO New England
States	Connecticut Maine Massachusetts New Hampshire New York Rhode Island Vermont
Last Update	Oct 2025
Annual Generation	104.5 TWh
Power Plants	1,577
Utilities	819
Ranked #14 out of 65 in terms of net annual generation
Ranked #11 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 56.4% Nuclear \| 25.5% Water \| 5% Other Fuel \| 4.5% Wind \| 3.9% Solar \| 1.5% Coal \| 0.4%

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Daily Net Generation for ISO New England for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Exelon Framingham LLC	Constellation Power, Inc	Framingham, MA	273 MWh	Aug 1969	Dec 2024	Distillate Fuel Oil
Exelon West Medway II LLC	Constellation Power, Inc	Medway, MA	178 GWh	Feb 2019	Aug 2025	Natural Gas : 97.8% Kerosene : 2.2%
Coolidge Solar 1, LLC	Coolidge Solar I, LLC	Ludlow, VT	24 GWh	Nov 2018	Aug 2025	Solar
Covanta Bristol Energy	Covanta Bristol Inc	Bristol, CT	108 GWh	Nov 1987	Aug 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Covanta Southeastern Connecticut Company	Covanta Southeastern Connecticut Company	Preston, CT	112 GWh	Nov 1991	Aug 2025	Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.2% Distillate Fuel Oil : 1.7%
Coventry Photovoltaic, LLC	Coventry Photovoltaic, LLC	Coventry, VT	2 GWh	Jul 2014	Dec 2024	Solar
Manheim New England	Cox Enterprises	North Dighton, MA	2 GWh	Nov 2012	Dec 2024	Solar
Beaver Ridge Wind	CPV Beaver Ridge Wind LLC	Freedom, ME	10 GWh	Oct 2008	Dec 2024	Wind
Canton Mountain Wind	CPV Canton Mountain Wind LLC	Canton, ME	51 GWh	Oct 2017	Dec 2024	Wind
Saddleback Ridge Wind Farm	CPV Saddleback Ridge Wind, LLC	Carthage, ME	83 GWh	Nov 2014	Dec 2024	Wind
Spruce Mountain WInd	CPV Spruce Mountain Wind LLC	Bryant Pond, ME	54 GWh	Nov 2011	Dec 2024	Wind
CPV Towantic Energy Center	CPV Towantic, LLC	Oxford, CT	5 TWh	Apr 2018	Aug 2025	Natural Gas
Cranberry Highway Solar LLC	Cranberry Highway Solar, LLC	Wareham, MA	2 GWh	Feb 2021	Dec 2024	Solar
Cream Street Solar	Cream Street Solar, LLC	Hyde Park, NY	4 GWh	Nov 2020	Dec 2024	Solar
Open View Solar Farm	Cross Pollination Inc	New Haven, VT	3 GWh	Aug 2013	Dec 2024	Solar
Williamstown Solar	CVI CleanCapital Solar 1 LLC	Williamstown, VT	2 GWh	Nov 2012	Dec 2024	Solar
Browne Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2024	Solar
Indian Hill Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	2 GWh	Mar 2014	Dec 2024	Solar
State Street Solar LLC	CVI CleanCapital Solar 1 LLC	Palmer, MA	1 GWh	Mar 2014	Dec 2024	Solar
SVEP Solar Project Company	CVI CleanCapital Solar 1 LLC	Pownal, VT	2 GWh	Nov 2012	Dec 2024	Solar
Leicester One MA Solar LLC	CVI CleanCapital Solar 1 LLC	Leicester, MA	6 GWh	Dec 2014	Dec 2024	Solar
Morin Solar 2013 LLC	CVI CleanCapital Solar 6	Warren, MA	5 GWh	Nov 2013	Dec 2024	Solar
Brookfield Solar 2013 LLC	CVI CleanCapital Solar 6	North Brookfield, MA	2 GWh	Nov 2013	Dec 2024	Solar
WYM 1250 Palmer LLC	CVI CleanCapital Solar 6	Palmer, MA	1 GWh	Aug 2013	Dec 2024	Solar
Oxford	CVI CleanCapital Solar 6	Oxford, MA	4 GWh	Jun 2014	Dec 2024	Solar
West Brookfield Solar, LLC	CVI CleanCapital Solar 7	West Brookfield, MA	2 GWh	Dec 2015	Dec 2024	Solar
Saint Albans Solar	Cypress Creek Renewables	Georgia, VT	8 GWh	Sep 2018	Dec 2024	Solar
Antanavica Solar	Cypress Creek Renewables	Leicester, MA	1 GWh	Jul 2018	Dec 2024	Solar
Next Generation Solar Farm	Cypress Creek Renewables	New Haven, VT	4 GWh	Nov 2017	Dec 2024	Solar
Danbury Hospital Cogen Plant	Danbury Hospital	Danbury, CT	28 GWh	Oct 2011	Dec 2024	Natural Gas
Dartmouth College Heating Plant	Dartmouth College	Hanover, NH	10 GWh	Dec 1969	Aug 2025	Residual Fuel Oil
Dartmouth Farms Solar	Dartmouth Farms Solar, LLC	Dartmouth, MA	4 GWh	Oct 2017	Dec 2024	Solar
Block Island Wind Farm	Deepwater Wind Block Island LLC	NA, RI	87 GWh	Nov 2016	Aug 2025	Wind
Dept of Corrections NCCI Wind	Dept of Corrections NCCI Wind	Gardner, MA	6 GWh	Oct 2013	Aug 2025	Wind
Derby Fuel Cell	Derby Fuel Cell LLC	Derby, CT	106 GWh	Dec 2023	Dec 2024	Natural Gas
Burlington Solar 1	DG Connecticut III, LLC	Burlington, CT	6 GWh	Jan 2022	Dec 2024	Solar
Watertown Solar One, LLC	DG Connecticut III, LLC	Watertown, CT	3 GWh	May 2021	Dec 2024	Solar
East Windsor Solar One	DG Connecticut III, LLC	East Windsor, CT	9 GWh	Nov 2021	Dec 2024	Solar
Southington Solar One	DG Connecticut III, LLC	Southington, CT	9 GWh	Jan 2022	Dec 2024	Solar
Bristol Solar One, LLC	DG Connecticut III, LLC	Bristol, CT	5 GWh	Apr 2021	Dec 2024	Solar
Torrington Solar One, LLC	DG Connecticut III, LLC	Torrington, CT	3 GWh	Feb 2021	Dec 2024	Solar
DG Crystal Spring CSG	DG Crystal Spring LLC	Mattapoisett, MA	7 GWh	Jun 2017	Dec 2024	Solar
DG Dighton LLC CSG	DG Dighton, LLC	Dighton, MA	5 GWh	Jun 2017	Dec 2024	Solar
DG Foxborough Elm CSG	DG Foxborough Elm LLC	Foxborough, MA	3 GWh	Jul 2017	Dec 2024	Solar
DG Haverhill CSG	DG Haverhill LLC	Haverhill, MA	2 GWh	Aug 2017	Dec 2024	Solar
Becton Canaan	DG Northeast 1, LLC	North Canaan, CT	3 GWh	Feb 2018	Dec 2024	Solar
DG Tufts Knoll LLC CSG	DG Tufts Knoll, LLC	North Grafton, MA	3 GWh	Jul 2017	Dec 2024	Solar
DG Tufts Science LLC CSG	DG Tufts Science, LLC	North Grafton, MA	1 GWh	Jan 2017	Dec 2024	Solar
DG Webster LLC CSG	DG Webster, LLC	Webster, MA	2 GWh	Nov 2017	Dec 2024	Solar
Dighton Power Plant	Dighton Power, LLC	Dighton, MA	531 GWh	Apr 1999	Dec 2024	Natural Gas
Lebanon CSG LLC	Dimension Energy LLC	Lebanon, ME	64 MWh	Nov 2024	Dec 2024	Solar
Dodge Falls Associates	Dodge Falls Associates LP	Bath, NH	29 GWh	Nov 1990	Dec 2024	Water
Millstone	Dominion Energy Nuclear Conn Inc	Waterford, CT	16 TWh	Nov 1975	Aug 2025	Nuclear
Downeast Wind	Downeast Wind, LLC	Columbia, ME	125 GWh	-	Aug 2025	Wind
Downing Parkway Solar	Downing Parkway Solar LLC	Pittsfield, MA	3 GWh	Jun 2015	Dec 2024	Solar
Dresser Hill CSG	Dresser Hill Solar, LLC	Southbridge, MA	6 GWh	Dec 2020	Dec 2024	Solar
Dudley Solar CSG	Dudley Solar, LLC	Dudley, MA	3 GWh	Jul 2017	Dec 2024	Solar
Cellu Tissue	Dunn Paper East Hartford, LLC	East Hartford, CT	12 GWh	Apr 2009	Aug 2025	Natural Gas
DWW Solar ll	DWW Solar ll LLC	Simsbury, CT	52 GWh	Nov 2019	Aug 2025	Solar
Brookfield Wire Company	Dynamic Energy Solutions, LLC	Brookfield, MA	2 GWh	May 2016	Dec 2024	Solar
Lochmere Hydroelectric Plant	Eagle Creek Renewable Energy, LLC	Tilton, NH	3 GWh	Nov 1984	Dec 2024	Water
Ball Mountain Hydro	Eagle Creek Renewable Energy, LLC	Jamaica, VT	61 MWh	Mar 2016	Dec 2024	Water
International Paper Woronoco Mill	Eagle Creek Renewable Energy, LLC	Woronoco, MA	5 GWh	Dec 1912	Dec 2024	Water
Stevens Mills Dam	Eagle Creek Renewable Energy, LLC	Franklin, NH	6 GWh	May 1982	Dec 2024	Water
Anson Abenaki Hydros	Eagle Creek Renewable Energy, LLC	Madison, ME	116 GWh	Dec 1949	Dec 2024	Water
Clement Dam Hydro LLC	Eagle Creek Renewable Energy, LLC	Tilton, NH	9 GWh	Nov 1984	Dec 2024	Water
International Paper Livermore Hydro	Eagle Creek Renewable Energy, LLC	Livermore Falls, ME	17 GWh	Dec 1909	Dec 2024	Water
Worumbo Hydro Station	Eagle Creek Renewable Energy, LLC	Lisbon Falls, ME	89 GWh	Jan 1989	Dec 2024	Water
International Paper Riley Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	18 GWh	Nov 1981	Dec 2024	Water
Otis Hydro	Eagle Creek Renewable Energy, LLC	Livermore Falls, ME	27 GWh	Dec 1984	Aug 2025	Water
International Paper Jay Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	7 GWh	Dec 1911	Dec 2024	Water
Pembroke Hydro	Eagle Creek Renewable Energy, LLC	Suncook, NH	7 GWh	Nov 1985	Dec 2024	Water
Newfound Hydroelectric	Eagle Creek Renewable Energy, LLC	Bristol, NH	4 GWh	Nov 1983	Dec 2024	Water
Gregg Falls	Eagle Creek Renewable Energy, LLC	Goffstown, NH	9 GWh	Nov 1985	Dec 2024	Water
Pepperell Hydro Power Plant	Eagle Creek Renewable Energy, LLC	Pepperell, MA	4 GWh	Dec 1919	Aug 2025	Water
Indian River Hydro	Eagle Creek Renewable Energy, LLC	Russell, MA	1 GWh	Nov 1909	Dec 2024	Water
East Brookfield Adams Road Solar LLC CSG	East Brookfield Adams Road Solar LLC	East Brookfield, MA	7 GWh	May 2021	Dec 2023	Solar
Eastern Maine Medical Center	Eastern Maine Medical Center	Bangor, ME	31 GWh	Sep 2006	Aug 2025	Natural Gas
Easthampton CSG	Easthampton Park Solar 1, LLC	Easthampton, MA	4 GWh	Aug 2020	Dec 2024	Solar
Easton CSG 1 LLC	Easton CSG 1 LLC	Easton, ME	5 GWh	Jan 2024	Dec 2024	Solar
Regional Waste Systems	Ecomaine	Portland, ME	90 GWh	May 1988	Aug 2025	Non-biogenic Municipal Solid Waste : 54.6% Biogenic Municipal Solid Waste : 44.6% Natural Gas : 0.8%
Battle Creek Solar	Ecos Energy LLC	Bennington, VT	3 GWh	Sep 2018	Dec 2024	Solar
Dickinson Solar (CT)	Ecos Energy LLC	Hampton, CT	3 GWh	May 2020	Dec 2024	Solar
Sudbury Solar	Ecos Energy LLC	Sudbury, VT	2 GWh	Apr 2016	Dec 2024	Solar
Adams Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2024	Solar
Hamilton Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2024	Solar
Jefferson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Dec 2017	Dec 2024	Solar
Sydney Solar	Ecos Energy LLC	Hampton, CT	3 GWh	May 2020	Dec 2024	Solar
Franklin Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2024	Solar
Sherman Solar	Ecos Energy LLC	Griswold, CT	1 GWh	Nov 2019	Dec 2024	Solar
Plainfield Solar 2	Ecos Energy LLC	Plainfield, CT	1 GWh	Mar 2020	Dec 2024	Solar
Wilson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2024	Solar
Jackson Solar (CT)	Ecos Energy LLC	Griswold, CT	1 GWh	Nov 2019	Dec 2024	Solar
Blair Solar	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2024	Solar
Gray Solar	Ecos Energy LLC	Rutland, VT	3 GWh	Jul 2023	Dec 2024	Solar
Clinton Solar	Ecos Energy LLC	Griswold, CT	2 GWh	Apr 2021	Dec 2024	Solar
Madison Solar (CT)	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2024	Solar
Few Solar	Ecos Energy LLC	Somers, CT	2 GWh	Dec 2020	Dec 2024	Solar
Plainfield Solar 1	Ecos Energy LLC	Plainfield, CT	1 GWh	Dec 2019	Dec 2024	Solar
McHenry Solar	Ecos Energy LLC	Hampton, CT	2 GWh	Sep 2021	Dec 2024	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	703.1 GWh	4
#25	Dominion Energy South Carolina, Inc.	25.5 TWh	87
#13	Duke Energy Carolinas	112.5 TWh	565
#17	Duke Energy Progress East	64.1 TWh	559
#52	Duke Energy Progress West	4.2 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	34.3 TWh	25
#12	New York Independent System Operator	131.5 TWh	1,211
#1	PJM Interconnection, LLC	867.9 TWh	2,465
#29	South Carolina Public Service Authority	18.8 TWh	34
#59	Southeastern Power Administration	1.5 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	187.5 TWh	2,075
#8	Tennessee Valley Authority	160.9 TWh	204
#10	Florida Power & Light Co.	149.7 TWh	187
#12	New York Independent System Operator	131.5 TWh	1,211
#13	Duke Energy Carolinas	112.5 TWh	565
#14	ISO New England	104.5 TWh	1,577
#16	Bonneville Power Administration	80.6 TWh	163
#17	Duke Energy Progress East	64.1 TWh	559
#18	PacifiCorp East	60.3 TWh	216
#19	Salt River Project Agricultural Improvement and Power District	60.3 TWh	48