ISO New England

Balancing Authority Summary Information

ISO New England is ranked #15 out of 64 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	Jul 2026
Annual Generation	111.1 TWh
Power Plants	1,629
Utilities	833
Ranked #15 out of 64 in terms of net annual generation
Ranked #10 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 54.9% Nuclear \| 25% Wind \| 5.1% Water \| 4.5% Other Fuel \| 4.4% Solar \| 1.6% Coal \| 0.1%

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

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Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
South Windsor Fuel Cell	South Energy Investments LLC	South Windsor, CT	37 GWh	Feb 2020	Dec 2025	Natural Gas
Fusion Solar Center LLC	Fusion Solar Centre, L.L.C	Baltic, CT	38 GWh	Feb 2018	May 2026	Solar
Otis Hydro	Eagle Creek Renewable Energy, LLC	Livermore Falls, ME	38 GWh	Dec 1984	May 2026	Water
Turnkey Landfill Gas Recovery	WM Renewable Energy LLC	Rochester, NH	39 GWh	Jan 1992	Dec 2025	Landfill Gas
Mcindoes	Great River Hydro, LLC	Barnet, VT	39 GWh	Dec 1930	Dec 2025	Water
Hartford Hospital Cogeneration	Cartier Energy, LLC	Hartford, CT	39 GWh	Jun 1988	Dec 2024	Natural Gas
Potter Station 2	Town of Braintree - (MA)	Braintree, MA	41 GWh	Jun 1963	Dec 2025	Natural Gas : 61.2% Distillate Fuel Oil : 38.8%
Erving Paper Mills	Erving Paper Mills Inc	Erving, MA	42 GWh	Nov 2013	May 2026	Natural Gas : 98.0% Distillate Fuel Oil : 2.0%
NE Renewable Power West Enfield	Stored Solar J&WE	West Enfield, ME	43 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids
Naval Sub Base New London Fuel Cell	Groton Station Fuel Cell, LLC	Groton, CT	44 GWh	Nov 2022	Dec 2024	Natural Gas
RoxWind	RoxWind LLC	Roxbury, ME	44 GWh	Oct 2021	Dec 2025	Wind
Deerfield 5	Great River Hydro, LLC	Florida, MA	44 GWh	Sep 1974	Dec 2025	Water
DWW Solar ll	DWW Solar ll LLC	Simsbury, CT	46 GWh	Nov 2019	May 2026	Solar
Pejepscot Hydroelectric Project	Topsham Hydro Partners	Topsham, ME	50 GWh	Oct 1987	Dec 2025	Water
Deer Rips	Brookfield White Pine Hydro LLC	Auburn, ME	51 GWh	Dec 1902	Dec 2025	Water
Pontook Hydro Facility	Pontook Operating LP	Dummer, NH	51 GWh	Nov 1986	Dec 2025	Water
Georges River Energy	Robbins Lumber Inc	Searsmont, ME	52 GWh	Nov 2018	Dec 2024	Wood/Wood Waste Solids
Sheldon Springs Hydroelectric	Central Rivers Power US, LLC	Sheldon Springs, VT	52 GWh	Jun 1988	Dec 2025	Water
Spruce Mountain WInd	CPV Spruce Mountain Wind LLC	Bryant Pond, ME	53 GWh	Nov 2011	Dec 2025	Wind
Rhode Island Hospital	Rhode Island Hospital	Providence, RI	53 GWh	Sep 1974	May 2026	Natural Gas : 87.3% Residual Fuel Oil : 12.7%
UNH 7.9 MW Plant	Emcor Energy Services	Durham, NH	53 GWh	Aug 2006	May 2026	Landfill Gas : 55.5% Natural Gas : 42.0% Distillate Fuel Oil : 2.5%
Cleary Flood Hybrid	City of Taunton - (MA)	Taunton, MA	54 GWh	May 1966	Dec 2025	Natural Gas : 94.0% Distillate Fuel Oil : 6.0%
Gillette SBMC	The Gillette Company	Boston, MA	54 GWh	Jan 1971	May 2026	Natural Gas
Waterbury Generation	Engie North America	Waterbury, CT	55 GWh	May 2009	Dec 2025	Natural Gas : 99.1% Kerosene : 0.9%
Stetson Wind II	Evergreen Wind, LLC	Danforth, ME	55 GWh	Feb 2010	Dec 2025	Wind
Athens Energy	Athens Energy, LLC	Athens, ME	56 GWh	Sep 2016	Dec 2025	Wood/Wood Waste Solids
Canton Mountain Wind	CPV Canton Mountain Wind LLC	Canton, ME	56 GWh	Oct 2017	Dec 2025	Wind
Sheffield Wind	Evergreen Wind, LLC	Sheffield, VT	57 GWh	Sep 2011	May 2026	Wind
Weston Hydro	Brookfield White Pine Hydro LLC	Skowhegan, ME	57 GWh	Dec 1919	Dec 2025	Water
Coventry Clean Energy Corporation	Washington Electric Coop - (VT)	Coventry, VT	57 GWh	Jun 2005	Dec 2025	Landfill Gas
Lawrence Hydroelectric Associates	Central Rivers Power US, LLC	Lawrence, MA	59 GWh	Jun 1981	Dec 2025	Water
NE Renewable Whitefield, LLC	NE Renewable Whitefield, LLC	Whitefield, NH	59 GWh	Feb 1988	Dec 2025	Wood/Wood Waste Solids
Boott Hydropower	Boott Hydro, LLC - Hybrid	Lowell, MA	61 GWh	Sep 1985	Dec 2025	Water
Lempster Wind LLC	Avangrid Power LLC	Lempster, NH	62 GWh	Nov 2008	May 2026	Wind
Univ of Massachusetts Medical Center	University of Massachusetts Medical	Worcester, MA	63 GWh	Mar 1974	Dec 2025	Natural Gas : 99.3% Distillate Fuel Oil : 0.6%
Williams Hydro	Brookfield White Pine Hydro LLC	Solon, ME	64 GWh	Dec 1938	Dec 2025	Water
Dry Bridge Solar (Brown University)	MN8 Energy LLC	North Kingstown, RI	64 GWh	Oct 2023	May 2026	Solar
Silver Maple	WEB Silver Maple Wind LLC	Clifton, ME	64 GWh	Sep 2022	Dec 2025	Wind
Amoskeag	Central Rivers Power NH, LLC	Manchester, NH	65 GWh	Jul 1922	Dec 2025	Water
Sikorsky Aircraft CHP	Sikorsky Aircraft Corporation	Stratford, CT	65 GWh	May 2010	Dec 2025	Natural Gas : 99.9%
Bull Hill Wind Project	Evergreen Wind, LLC	Eastbrook, ME	66 GWh	Sep 2012	Dec 2025	Wind
Robin Hollow Solar	Robin Hollow Solar, LLC	West Greenwich, RI	69 GWh	Nov 2023	May 2026	Solar
Brunswick Hydro	Brookfield White Pine Hydro LLC	Brunswick, ME	70 GWh	Feb 1982	Dec 2025	Water
West Enfield Hydro	Brookfield Black Bear Hydro, LLC	West Enfield, ME	70 GWh	Mar 1988	Dec 2025	Water
Stevenson	FirstLight Power Resources Services LLC	Monroe, CT	71 GWh	Dec 1918	Dec 2025	Water
Generate Colchester Fuel Cells, LLC	Generate Colchester Fuel Cells, LLC	Colchester, CT	72 GWh	Sep 2021	Dec 2025	Natural Gas
New England Wind LLC	Avangrid Power LLC	Florida, MA	73 GWh	Nov 2012	May 2026	Wind
NE Renewable Springfield, LLC	NE Renewable Springfield, LLC	Springfield, NH	73 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids
Worumbo Hydro Station	Eagle Creek Renewable Energy, LLC	Lisbon Falls, ME	74 GWh	Jan 1989	Dec 2025	Water
Quinebaug Solar	Quinebaug Solar, LLC	Canterbury, CT	74 GWh	Nov 2021	May 2026	Solar
Pfizer Groton Plant	Pfizer Inc	Groton, CT	75 GWh	Dec 1947	May 2026	Natural Gas : 88.5% Distillate Fuel Oil : 11.5%
Antrim Wind	Antrim Wind Energy LLC	Antrim, NH	76 GWh	Nov 2019	May 2026	Wind
Pratt & Whitney	United Technologies	East Hartford, CT	76 GWh	Dec 1991	May 2026	Natural Gas
Skelton	Brookfield White Pine Hydro LLC	Dayton, ME	77 GWh	Dec 1947	Dec 2025	Water
NE Renewable Tamworth, LLC	NE Renewable Tamworth, LLC	Tamworth, NH	78 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids
NE Renewable Fitchburg, LLC	NE Renewable Fitchburg, LLC	Westminster, MA	79 GWh	Jul 1992	Dec 2025	Wood/Wood Waste Solids : 98.7% Natural Gas : 1.3%
Central Heating Plant	University of Massachusetts Amherst	Amherst, MA	80 GWh	Sep 2007	Dec 2025	Natural Gas : 96.3% Distillate Fuel Oil : 3.7%
Block Island Wind Farm	Deepwater Wind Block Island LLC	NA, RI	83 GWh	Nov 2016	May 2026	Wind
Regional Waste Systems	Ecomaine	Portland, ME	87 GWh	May 1988	May 2026	Non-biogenic Municipal Solid Waste : 54.6% Biogenic Municipal Solid Waste : 44.7% Natural Gas : 0.7%
Sanford Solar	Sanford Airport Solar, LLC	Sanford, ME	87 GWh	Oct 2020	May 2026	Solar
Smith (NH)	Central Rivers Power NH, LLC	Berlin, NH	87 GWh	Jul 1948	Dec 2025	Water
Dartmouth Power Associates LP	Dartmouth Energy Center	Dartmouth, MA	89 GWh	Feb 1992	Dec 2025	Natural Gas : 96.7% Distillate Fuel Oil : 3.3%
Saddleback Ridge Wind Farm	CPV Saddleback Ridge Wind, LLC	Carthage, ME	90 GWh	Nov 2014	Dec 2025	Wind
Bridgeport Fuel Cell, LLC	Bridgeport Fuel Cell, LLC	Bridgeport, CT	90 GWh	Nov 2013	Dec 2025	Natural Gas
Deerfield Wind LLC	Avangrid Power LLC	Searsburg, VT	92 GWh	Nov 2017	May 2026	Wind
Shepaug	FirstLight Power Resources Services LLC	Southbury, CT	93 GWh	Dec 1954	Dec 2025	Water
Wheelabrator Concord Facility	Wheelabrator Environmental Systems	Concord, NH	93 GWh	Mar 1989	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Harriman	Great River Hydro, LLC	Whitingham, VT	98 GWh	Apr 1924	Dec 2025	Water
Anson Abenaki Hydros	Eagle Creek Renewable Energy, LLC	Madison, ME	101 GWh	Dec 1949	Dec 2025	Water
Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, CT	101 GWh	Sep 1995	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Berlin Gorham	Great Lakes Hydro America LLC	Berlin, NH	101 GWh	Dec 1913	Dec 2025	Water
Groton Wind LLC	Avangrid Power LLC	Groton, NH	101 GWh	Nov 2012	May 2026	Wind
Bridgewater Power LP	Bridgewater Power Co LP	Bridgewater, NH	103 GWh	Jul 1987	Dec 2025	Wood/Wood Waste Solids : 99.8%
Wallingford Energy	Wallingford Energy LLC	Wallingford, CT	107 GWh	Jul 2001	Dec 2025	Natural Gas
Covanta Southeastern Connecticut Company	Covanta Southeastern Connecticut Company	Preston, CT	108 GWh	Nov 1991	May 2026	Non-biogenic Municipal Solid Waste : 53.9% Biogenic Municipal Solid Waste : 44.1% Distillate Fuel Oil : 2.1%
Covanta Bristol Energy	Covanta Bristol Inc	Bristol, CT	109 GWh	Nov 1987	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Record Hill Wind	Record Hill Wind LLC	Roxbury, ME	110 GWh	Dec 2011	Dec 2025	Wind
Derby Fuel Cell	Derby Fuel Cell LLC	Derby, CT	110 GWh	Dec 2023	Dec 2025	Natural Gas
Moscow	Greenbacker Renewable Energy Corporation	Moscow, ME	112 GWh	May 2025	May 2026	Wind
UCONN Cogen Facility	University of Connecticut	Storrs, CT	112 GWh	Feb 2006	May 2026	Natural Gas : 95.2% Distillate Fuel Oil : 4.8%
Hancock Wind Plant	Onward Energy	T22 MD, ME	112 GWh	Nov 2016	May 2026	Wind
Charles E Monty	Brookfield White Pine Hydro LLC	Lewiston, ME	114 GWh	Dec 1989	Dec 2025	Water
Gulf Island	Brookfield White Pine Hydro LLC	Lewiston, ME	115 GWh	Dec 1925	Dec 2025	Water
Merrimack	Granite Shore Power	Bow, NH	116 GWh	Nov 1960	May 2026	Bituminous Coal : 97.6% Jet Fuel : 2.3%
Vernon Dam	Great River Hydro, LLC	Vernon, VT	119 GWh	Jul 1909	Dec 2025	Water
Farmington Solar	Farmington Solar, LLC	Farmington, ME	125 GWh	Sep 2021	May 2026	Solar
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	132 GWh	Mar 2005	May 2026	Natural Gas
Montville Station	Montville Power LLC	Uncasville, CT	133 GWh	Dec 1953	Dec 2025	Residual Fuel Oil : 74.2% Natural Gas : 24.9% Distillate Fuel Oil : 0.9%
Wilder	Great River Hydro, LLC	Hartford, VT	134 GWh	Oct 1950	Dec 2025	Water
Pittsfield Generating LP	Pittsfield Generating Company, LP	Pittsfield, MA	136 GWh	Jun 1990	May 2026	Natural Gas : 96.9% Distillate Fuel Oil : 3.1%
Hadley Falls	City of Holyoke Gas and Elec Dept - (MA)	Holyoke, MA	137 GWh	Dec 1951	Dec 2025	Water
Passadumkeag Windpark LLC	Southern Power Co	Greenbush, ME	138 GWh	Jun 2016	May 2026	Wind
Stetson Wind I	Evergreen Wind, LLC	Danforth, ME	146 GWh	Dec 2008	Dec 2025	Wind
Rollins Wind Project	Evergreen Wind, LLC	Winn Village, ME	147 GWh	Jun 2011	Dec 2025	Wind
Algonquin Windsor Locks	Ahlstrom Power Windsor Locks LLC	Windsor Locks, CT	147 GWh	Dec 1989	May 2026	Natural Gas : 92.2% Distillate Fuel Oil : 7.8%
Harris Hydro	Brookfield White Pine Hydro LLC	West Forks, ME	151 GWh	Dec 1953	Dec 2025	Water
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	157 GWh	Dec 2002	Dec 2025	Natural Gas
Newington	Granite Shore Power	Newington, NH	157 GWh	May 1974	Apr 2026	Residual Fuel Oil : 64.1% Natural Gas : 34.5% Distillate Fuel Oil : 1.4%
Ryegate Associates, LLC	Ryegate Associates, LLC	East Ryegate, VT	158 GWh	Aug 1992	Dec 2025	Wood/Wood Waste Solids
Stony Brook	Massachusetts Mun Wholes Electric Co	Ludlow, MA	164 GWh	Oct 1981	May 2026	Distillate Fuel Oil : 61.3% Natural Gas : 38.7%

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	442.5 GWh	4
#24	Dominion Energy South Carolina, Inc.	25.3 TWh	83
#13	Duke Energy Carolinas	112.6 TWh	577
#17	Duke Energy Progress East	64.5 TWh	565
#50	Duke Energy Progress West	4.5 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	33.9 TWh	25
#12	New York Independent System Operator	134.3 TWh	1,299
#1	PJM Interconnection, LLC	882.8 TWh	2,652
#31	South Carolina Public Service Authority	18.5 TWh	35
#59	Southeastern Power Administration	1.3 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	169.4 TWh	2,135
#9	Tennessee Valley Authority	163.4 TWh	207
#10	Florida Power & Light Co.	152.2 TWh	187
#12	New York Independent System Operator	134.3 TWh	1,299
#13	Duke Energy Carolinas	112.6 TWh	577
#15	ISO New England	111.1 TWh	1,629
#16	Bonneville Power Administration	91.6 TWh	167
#17	Duke Energy Progress East	64.5 TWh	565
#18	PacifiCorp East	60.9 TWh	222
#19	Salt River Project Agricultural Improvement and Power District	60.3 TWh	49