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
General Electric Aircraft Engines	General Electric Aircraft Engines	Lynn, MA	2 GWh	Dec 1947	May 2026	Solar
Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, CT	430 GWh	Jun 1988	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Saugus	Wheelabrator Environmental Systems	Saugus, MA	180 GWh	Jul 1985	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Millbury Facility	Wheelabrator Environmental Systems	Millbury, MA	288 GWh	Aug 1987	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Hampton Facility	Foss Manufacturing Company LLC	Hampton, NH	28 GWh	Sep 1978	May 2026	Natural Gas
Wheelabrator North Andover	Wheelabrator Environmental Systems	North Andover, MA	240 GWh	Apr 1985	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
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%
Jericho Power	Jericho Power LLC	Berlin, NH	23 GWh	Dec 2015	May 2026	Wind
Indian Orchard Plant 1	Solutia Inc-Indian	Springfield, MA	7 GWh	Apr 1985	May 2026	Natural Gas
Covanta Haverhill	Ogden Projects Inc-Haverhill	Haverhill, MA	287 GWh	Apr 1989	May 2026	Non-biogenic Municipal Solid Waste : 52.8% Biogenic Municipal Solid Waste : 43.2% Distillate Fuel Oil : 4.1%
Cottage Street Solar Facility	Western Massachusetts Electric Company	Springfield, MA	4 GWh	Apr 2014	May 2026	Solar
Rumford Cogeneration	ND Paper, Inc.	Rumford, ME	400 GWh	Dec 1989	May 2026	Black Liquor : 55.5% Tire-derived Fuels : 20.6% Wood/Wood Waste Solids : 16.0% Bituminous Coal : 6.1% Residual Fuel Oil : 1.2% Sludge Waste : 0.7%
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%
University Solar, LLC	AES Distributed Energy	West Greenwich, RI	27 GWh	Nov 2019	May 2026	Solar
Sanford Solar	Sanford Airport Solar, LLC	Sanford, ME	87 GWh	Oct 2020	May 2026	Solar
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%
Coolidge Solar 1, LLC	Coolidge Solar I, LLC	Ludlow, VT	25 GWh	Nov 2018	May 2026	Solar
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%
Pepperell Hydro Power Plant	Eagle Creek Renewable Energy, LLC	Pepperell, MA	2 GWh	Dec 1919	May 2026	Water
Somerset Plant	Sappi Fine Paper North America-Somerset	Skowhegan, ME	568 GWh	Dec 1975	May 2026	Black Liquor : 45.9% Wood/Wood Waste Solids : 32.4% Natural Gas : 13.1% Tire-derived Fuels : 4.1% Residual Fuel Oil : 3.7% Sludge Waste : 0.5%
Deer Island Treatment Plant	Massachusetts Wtr Rauth-Deer I	Winthrop, MA	33 GWh	Jul 1995	May 2026	Other Biomass Gas : 82.5% Distillate Fuel Oil : 13.1% Wind : 2.7% Solar : 1.8%
Dept of Corrections NCCI Wind	Dept of Corrections NCCI Wind	Gardner, MA	2 GWh	Oct 2013	May 2026	Wind
Cape Cod Air Force Station - 6 SWS	US Space Force	Sagamore, MA	6 GWh	Dec 2013	May 2026	Wind
Frito Lay Incorporated	Frito Lay Incorporated Dayville	Dayville, CT	25 GWh	Feb 2009	May 2026	Natural Gas
Pittsfield Generating LP	Pittsfield Generating Company, LP	Pittsfield, MA	136 GWh	Jun 1990	May 2026	Natural Gas : 96.9% Distillate Fuel Oil : 3.1%
MMWAC Resource Recovery Facility	Maine Waste to Energy	Auburn, ME	8 GWh	May 1992	May 2026	Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.2% Natural Gas : 1.8%
Hancock Wind Plant	Onward Energy	T22 MD, ME	112 GWh	Nov 2016	May 2026	Wind
Otis Hydro	Eagle Creek Renewable Energy, LLC	Livermore Falls, ME	38 GWh	Dec 1984	May 2026	Water
Woods Hill Solar	Woods Hill Solar, LLC	Pomfret, CT	22 GWh	Nov 2018	May 2026	Solar
SEMASS Resource Recovery	SEMASS Partnership	West Wareham, MA	553 GWh	Jun 1988	May 2026	Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.2% Natural Gas : 1.7%
Fusion Solar Center LLC	Fusion Solar Centre, L.L.C	Baltic, CT	38 GWh	Feb 2018	May 2026	Solar
Bucksport Generation LLC	Bucksport Generation LLC	Bucksport, ME	29 GWh	Jun 1965	May 2026	Natural Gas : 57.8% Distillate Fuel Oil : 42.2%
Blackstone/Tupperware	Blackstone Hydro Inc.	North Smithfield, RI	2 GWh	Dec 1980	May 2026	Water
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%
J C McNeil	City of Burlington Electric - (VT)	Burlington, VT	224 GWh	May 1984	Apr 2026	Wood/Wood Waste Solids : 99.8%
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	4 TWh	Sep 2002	Apr 2026	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%
Southbridge Solar	AES Distributed Energy	Southbridge, MA	2 GWh	Feb 2016	Mar 2026	Solar
Central Power Plant	State of Rhode Island	Cranston, RI	19 GWh	Jul 1958	Mar 2026	Natural Gas : 97.5% Distillate Fuel Oil : 2.5%
New Haven Steam	Generation Bridge II Connecticut, LLC	New Haven, CT	167 GWh	Jun 1975	Jan 2026	Residual Fuel Oil : 45.1% Natural Gas : 40.3% Distillate Fuel Oil : 12.2% Kerosene : 2.5%
WED Kingstown Solar I - East Array	CleanCapital Holdings	Washington, RI	5 GWh	Nov 2017	Dec 2025	Solar
Kearsarge GB	Kearsarge GB LLC	Great Barrington, MA	3 GWh	Jul 2018	Dec 2025	Solar
Westminster	MN8 Energy LLC	Westminster, VT	2 GWh	Nov 2016	Dec 2025	Solar
BWC Pocasset River	BWC Pocasset River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
BWC Harlow Brook	BWC Harlow Brook, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
BWC Wareham River	BWC Wareham River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
BWC Gibbs Brook	BWC Gibbs Brook, LLC	Wareham, MA	7 GWh	Nov 2018	Dec 2025	Solar
BWC Origination 18	BWC Origination 18, LLC	Mattapoisett, MA	7 GWh	Nov 2018	Dec 2025	Solar
Barre Solar III LLC	AES Distributed Energy	Barre, MA	1 GWh	Feb 2018	Dec 2025	Solar
Dynamic - Walpole	AES Distributed Energy	Walpole, MA	2 GWh	May 2017	Dec 2025	Solar
North Stonington Solar Center, LLC	Adapture Renewables, Inc.	North Stonington, CT	32 GWh	Sep 2022	Dec 2025	Solar
Plymouth Solar	NSTAR Electric Company	Plymouth, MA	2 GWh	May 2018	Dec 2025	Solar
Lee Site 31 Solar	NSTAR Electric Company	Lee, MA	149 MWh	Jul 2018	Dec 2025	Solar
Pittsfield 44 - M&W PV	NSTAR Electric Company	Pittsfield, MA	2 GWh	Jul 2018	Dec 2025	Solar
Westminster Renewables, LLC CSG	Westminster Renewables, LLC	Westminster, MA	2 GWh	Sep 2018	Dec 2025	Solar
Monson Solar, LLC	Monson Solar, LLC	Monson, MA	3 GWh	Jul 2017	Dec 2025	Solar
Williamsburg	AES Distributed Energy	Goshen, MA	6 GWh	Jun 2019	Dec 2025	Solar
Dudley Solar CSG	Dudley Solar, LLC	Dudley, MA	3 GWh	Jul 2017	Dec 2025	Solar
Ashby Solar, LLC CSG	Ashby Solar, LLC	Fitchburg, MA	3 GWh	Jun 2018	Dec 2025	Solar
Griffin Road Solar, LLC CSG	Griffin Road Solar, LLC	Charlton, MA	3 GWh	Feb 2018	Dec 2025	Solar
East Bridgewater Solar	Altus Power America Management, LLC	East Bridgewater, MA	3 GWh	Oct 2017	Dec 2025	Solar
Hadley 2 Solar, LLC CSG	Hadley 2 Solar, LLC	Hadley, MA	3 GWh	Nov 2016	Dec 2025	Solar
Palmer	AES Distributed Energy	Palmer, MA	6 GWh	Sep 2019	Dec 2025	Solar
WED GW Solar, LLC	CleanCapital Holdings	Lincoln, RI	4 GWh	Dec 2018	Dec 2025	Solar
WED Shun III, LLC	WED Shun III, LLC	Johnston, RI	8 GWh	Dec 2018	Dec 2025	Wind
WED Shun II, LLC	WED Shun II, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Plainfield, LLC	WED Plainfield, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Plainfield III, LLC	WED Plainfield III, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Plainfield II, LLC	WED Plainfield II, LLC	Johnston, RI	8 GWh	Dec 2018	Dec 2025	Wind
Ludlow Site 72 - Conti	NSTAR Electric Company	Ludlow, MA	3 GWh	Jul 2018	Dec 2025	Solar
East Springfield Solar PV	NSTAR Electric Company	Springfield, MA	2 GWh	Sep 2018	Dec 2025	Solar
Hatfield Solar PV	NSTAR Electric Company	Hatfield, MA	5 GWh	Nov 2018	Dec 2025	Solar
Sunderland Solar PV	NSTAR Electric Company	Sunderland, MA	2 GWh	Aug 2018	Dec 2025	Solar
Town of Branford	Tesla Inc.	Branford, CT	2 GWh	May 2018	Dec 2025	Solar
Hampden Solar PV	NSTAR Electric Company	Hampden, MA	6 GWh	Oct 2019	Dec 2025	Solar
Springfield Solar PV	NSTAR Electric Company	Springfield, MA	6 GWh	Dec 2018	Dec 2025	Solar
Southampton Solar PV	NSTAR Electric Company	Southampton, MA	3 GWh	Jan 2019	Dec 2025	Solar
Savoy Solar PV	NSTAR Electric Company	Savoy, MA	3 GWh	Jan 2019	Dec 2025	Solar
Hinsdale Solar PV	NSTAR Electric Company	Hinsdale, MA	3 GWh	Dec 2018	Dec 2025	Solar
Greenfield Solar PV	NSTAR Electric Company	Greenfield, MA	3 GWh	Dec 2018	Dec 2025	Solar
East Longmeadow Solar PV	NSTAR Electric Company	East Longmeadow, MA	8 GWh	Sep 2019	Dec 2025	Solar
Wareham Solar PV	NSTAR Electric Company	Wareham, MA	1 GWh	Nov 2018	Dec 2025	Solar
Adams Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2025	Solar
Hamilton Solar	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2025	Solar
Jefferson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Dec 2017	Dec 2025	Solar
Wilson Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2025	Solar
Franklin Solar (CT)	Ecos Energy LLC	Lebanon, CT	2 GWh	Feb 2018	Dec 2025	Solar
Saint Albans Solar	Cypress Creek Renewables	Georgia, VT	7 GWh	Sep 2018	Dec 2025	Solar
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	157 GWh	Dec 2002	Dec 2025	Natural Gas
Hope Farm Solar, LLC	Adapture Renewables, Inc.	Cranston, RI	16 GWh	Aug 2019	Dec 2025	Solar
IKEA New Haven Rooftop PV & Fuel Cell	IKEA Property Inc	New Haven, CT	3 GWh	Jun 2012	Dec 2025	Natural Gas : 71.5% Solar : 28.5%
Kearsarge Granby	Kearsarge Granby LLC	Granby, MA	4 GWh	Feb 2017	Dec 2025	Solar
Kearsarge Concord II	Kearsarge Concord II LLC	Concord, MA	7 GWh	Dec 2016	Dec 2025	Solar
Syncarpha Still River, LLC CSG	Syncarpha Still River, LLC	Bolton, MA	4 GWh	Nov 2016	Dec 2025	Solar
Bird Machine Solar Farm	Bird Machine Solar Farm, LLC	South Walpole, MA	6 GWh	Jul 2017	Dec 2025	Solar
Nexamp Peak CSG	Nexamp Peak, LLC	Hancock, MA	2 GWh	Nov 2015	Dec 2025	Solar
Sutton Solar CSG	Sutton Solar, LLC	Sutton, MA	3 GWh	Oct 2016	Dec 2025	Solar
Kearsarge Southwick LLC	Kearsarge Solar LLC	Southwick, MA	5 GWh	Feb 2015	Dec 2025	Solar
Bashaw Solar CSG 1, LLC	Bashaw Solar 1, LLC	Newbury, MA	3 GWh	Mar 2017	Dec 2025	Solar
VEC Alburgh Array	SoCore Energy LLC	Alburgh, VT	1 GWh	Nov 2016	Dec 2025	Solar

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