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	Jun 2026
Annual Generation	111.3 TWh
Power Plants	1,577
Utilities	819
Ranked #15 out of 64 in terms of net annual generation
Ranked #11 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 55.6% Nuclear \| 24.8% Wind \| 4.8% Water \| 4.4% Other Fuel \| 4.3% Solar \| 1.5% 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
WED Coventry 2	WED Coventry Two, LLC	Coventry, RI	10 GWh	Jul 2016	Mar 2026	Wind
Algonquin Windsor Locks	Ahlstrom Power Windsor Locks LLC	Windsor Locks, CT	146 GWh	Dec 1989	Mar 2026	Natural Gas : 92.2% Distillate Fuel Oil : 7.8%
Johnston LFG Turbine Plant	Rhode Island LFG Genco	Johnston, RI	176 GWh	Apr 2013	Mar 2026	Landfill Gas
Covanta Southeastern Connecticut Company	Covanta Southeastern Connecticut Company	Preston, CT	112 GWh	Nov 1991	Mar 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	3 GWh	Dec 1919	Mar 2026	Water
WED Shun I, LLC	WED Shun I, LLC	Johnston, RI	8 GWh	Dec 2018	Mar 2026	Wind
Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, CT	439 GWh	Jun 1988	Mar 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Passadumkeag Windpark LLC	Southern Power Co	Greenbush, ME	136 GWh	Jun 2016	Mar 2026	Wind
Deer Island Treatment Plant	Massachusetts Wtr Rauth-Deer I	Winthrop, MA	34 GWh	Jul 1995	Mar 2026	Other Biomass Gas : 81.2% Distillate Fuel Oil : 14.2% Wind : 2.8% Solar : 1.8%
Wheelabrator Saugus	Wheelabrator Environmental Systems	Saugus, MA	183 GWh	Jul 1985	Mar 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Millbury Facility	Wheelabrator Environmental Systems	Millbury, MA	319 GWh	Aug 1987	Mar 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator North Andover	Wheelabrator Environmental Systems	North Andover, MA	236 GWh	Apr 1985	Mar 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Coolidge Solar 1, LLC	Coolidge Solar I, LLC	Ludlow, VT	24 GWh	Nov 2018	Mar 2026	Solar
Wheelabrator Concord Facility	Wheelabrator Environmental Systems	Concord, NH	95 GWh	Mar 1989	Mar 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
MMWAC Resource Recovery Facility	Maine Waste to Energy	Auburn, ME	8 GWh	May 1992	Mar 2026	Non-biogenic Municipal Solid Waste : 53.9% Biogenic Municipal Solid Waste : 44.1% Natural Gas : 1.9%
Sanford Solar	Sanford Airport Solar, LLC	Sanford, ME	86 GWh	Oct 2020	Mar 2026	Solar
Otis Hydro	Eagle Creek Renewable Energy, LLC	Livermore Falls, ME	31 GWh	Dec 1984	Mar 2026	Water
University Solar, LLC	AES Distributed Energy	West Greenwich, RI	26 GWh	Nov 2019	Mar 2026	Solar
WED Green Hill, LLC	WED Green Hill, LLC	Johnston, RI	6 GWh	Dec 2018	Mar 2026	Wind
Covanta Haverhill	Ogden Projects Inc-Haverhill	Haverhill, MA	227 GWh	Apr 1989	Mar 2026	Non-biogenic Municipal Solid Waste : 52.2% Biogenic Municipal Solid Waste : 42.7% Distillate Fuel Oil : 5.1%
Blackstone/Tupperware	Blackstone Hydro Inc.	North Smithfield, RI	2 GWh	Dec 1980	Mar 2026	Water
Regional Waste Systems	Ecomaine	Portland, ME	87 GWh	May 1988	Mar 2026	Non-biogenic Municipal Solid Waste : 54.5% Biogenic Municipal Solid Waste : 44.6% Natural Gas : 0.8%
Bucksport Generation LLC	Bucksport Generation LLC	Bucksport, ME	24 GWh	Jun 1965	Mar 2026	Distillate Fuel Oil : 51.5% Natural Gas : 48.5%
Covanta Bristol Energy	Covanta Bristol Inc	Bristol, CT	109 GWh	Nov 1987	Mar 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
SEMASS Resource Recovery	SEMASS Partnership	West Wareham, MA	553 GWh	Jun 1988	Mar 2026	Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.1% Natural Gas : 1.7%
Central Power Plant	State of Rhode Island	Cranston, RI	19 GWh	Jul 1958	Mar 2026	Natural Gas : 97.5% Distillate Fuel Oil : 2.5%
Montague Site 36-Grosolar	NSTAR Electric Company	Millers Falls, MA	6 GWh	Sep 2018	Mar 2026	Solar
Southwick Solar PV	NSTAR Electric Company	Southwick, MA	8 GWh	Dec 2018	Mar 2026	Solar
Jericho Power	Jericho Power LLC	Berlin, NH	22 GWh	Dec 2015	Mar 2026	Wind
Somerset Plant	Sappi Fine Paper North America-Somerset	Skowhegan, ME	568 GWh	Dec 1975	Mar 2026	Black Liquor : 45.8% Wood/Wood Waste Solids : 34.9% Natural Gas : 10.7% Tire-derived Fuels : 4.3% Residual Fuel Oil : 3.5% Sludge Waste : 0.6%
Wind Colebrook South	Wind Colebrook South	Colebrook, CT	12 GWh	Oct 2015	Feb 2026	Wind
Merrimack	Granite Shore Power	Bow, NH	116 GWh	Nov 1960	Feb 2026	Bituminous Coal : 97.5% Jet Fuel : 2.4%
Newington	Granite Shore Power	Newington, NH	153 GWh	May 1974	Feb 2026	Residual Fuel Oil : 65.7% Natural Gas : 32.8% Distillate Fuel Oil : 1.5%
Indian Orchard Plant 1	Solutia Inc-Indian	Springfield, MA	5 GWh	Apr 1985	Feb 2026	Natural Gas
Rhode Island Hospital	Rhode Island Hospital	Providence, RI	53 GWh	Sep 1974	Feb 2026	Natural Gas : 87.3% Residual Fuel Oil : 12.7%
Pittsfield Generating LP	Pittsfield Generating Company, LP	Pittsfield, MA	136 GWh	Jun 1990	Feb 2026	Natural Gas : 96.9% Distillate Fuel Oil : 3.1%
Schiller	Granite Shore Power	Portsmouth, NH	1 GWh	Sep 1952	Jan 2026	Jet Fuel
Berlin 5	Green Mountain Power Corp	Berlin, VT	2 GWh	May 1972	Jan 2026	Kerosene
New Haven Harbor	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%
Indeck Jonesboro Energy Center	Stored Solar J&WE	Jonesboro, ME	16 MWh	Nov 1987	Jun 2025	Gaseous Propane : 66.7% Wood/Wood Waste Solids : 33.3%
Kearsarge Granby	Kearsarge Granby LLC	Granby, MA	4 GWh	Feb 2017	Dec 2024	Solar
Ajax Solar, LLC (MA)	Green Street Power Partners	West Bridgewater, MA	4 GWh	Nov 2017	Dec 2024	Solar
GSPP Raynham TMLP, LLC CSG	Green Street Power Partners	Raynham, MA	4 GWh	Jan 2019	Dec 2024	Solar
GSPP Terrawatt Westfield LLC CSG	Green Street Power Partners	Westfield, MA	6 GWh	Jan 2019	Dec 2024	Solar
GSPP Devens, LLC	Green Street Power Partners	Ayer, MA	3 GWh	Dec 2018	Dec 2024	Solar
10 Briggs Solar NG, LLC (East)	NuGen Capital Management	East Greenwich, RI	7 GWh	May 2021	Dec 2024	Solar
Westtown CSG	Altus Power America Management, LLC	Westtown, NY	3 GWh	Apr 2019	Dec 2024	Solar
Carver CSG	Altus Power America Management, LLC	Carver, MA	4 GWh	Apr 2019	Dec 2024	Solar
Hopkinton CSG	Altus Power America Management, LLC	Hopkinton, MA	3 GWh	Mar 2019	Dec 2024	Solar
Bridgewater Complex Co-Generation Plant	Massachusetts Department of Correction	Bridgewater, MA	1 GWh	Oct 2015	Dec 2024	Natural Gas
MHG Wallingford	Standard Solar	Wallingford, VT	4 GWh	Nov 2019	Dec 2024	Solar
CED Northampton Solar LLC Hybrid	Consolidated Edison Development Inc.	Northampton, MA	7 GWh	Nov 2019	Dec 2024	Solar
Nautilus Goat Island Solar LLC (CSG)	Nautilus Solar Solutions	Burrillville, RI	4 GWh	Jul 2019	Dec 2024	Solar
Happy Hollow CSG Hybrid	REA Investments, LLC	Winchendon, MA	9 GWh	Sep 2019	Dec 2024	Solar
Washburn Road Solar	REA Investments, LLC	Freetown, MA	3 GWh	Nov 2018	Dec 2024	Solar
Manchester Community College North	Onyx Asset Services Group	Great Path, CT	1 GWh	Sep 2018	Dec 2024	Solar
Manchester Community College East	Onyx Asset Services Group	Manchester, CT	2 GWh	Sep 2018	Dec 2024	Solar
West Water Street	City of Taunton	Taunton, MA	2 GWh	Dec 2017	Dec 2024	Distillate Fuel Oil
ALDI DC 2	Powerflex	South Windsor, CT	1 GWh	Jan 2018	Dec 2024	Solar
Derby Fuel Cell	Derby Fuel Cell LLC	Derby, CT	106 GWh	Dec 2023	Dec 2024	Natural Gas
Tanglewood Circle Solar 1 LLC	Tanglewood Circle Solar 1 LLC	Becket, MA	8 GWh	Oct 2018	Dec 2024	Solar
Tolland Solar NG LLC	NuGen Capital Management	Tolland, MA	5 GWh	Sep 2014	Dec 2024	Solar
Plainfield Community Solar LLC	Plainfield Solar LLC	Plainfield, MA	3 GWh	Jan 2019	Dec 2024	Solar
GD West Greenwich Victory I, LLC	GD West Greenwich Victory I, LLC	West Greenwich, RI	3 GWh	Nov 2019	Dec 2024	Solar
GD Richmond Buttonwoods I, LLC	GD Richmond Buttonwoods I, LLC	Richmond, RI	2 GWh	Nov 2019	Dec 2024	Solar
Kearsarge Wilmington	Kearsarge Wilmington LLC	Wilmington, MA	2 GWh	Nov 2017	Dec 2024	Solar
Kearsarge SKSC2 LLC	Kearsarge SKSC2 LLC	South Kingstown, RI	6 GWh	Sep 2018	Dec 2024	Solar
Kearsarge Montague	Kearsarge Montague LLC	Montague, MA	7 GWh	May 2018	Dec 2024	Solar
Kearsarge Uxbridge	Kearsarge Uxbridge LLC	Uxbridge, MA	3 GWh	Aug 2018	Dec 2024	Solar
Kearsarge SKSC1 LLC	Kearsarge SKSC1 LLC	South Kingstown, RI	6 GWh	Sep 2018	Dec 2024	Solar
Kearsarge GB	Kearsarge GB LLC	Great Barrington, MA	3 GWh	Jul 2018	Dec 2024	Solar
Winchendon Landfill Solar	Onyx Asset Services Group	Winchendon, MA	3 GWh	Sep 2018	Dec 2024	Solar
Westminster	MN8 Energy LLC	Westminster, VT	3 GWh	Nov 2016	Dec 2024	Solar
BWC Pocasset River	BWC Pocasset River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2024	Solar
BWC Harlow Brook	BWC Harlow Brook, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2024	Solar
BWC Wareham River	BWC Wareham River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2024	Solar
BWC Gibbs Brook	BWC Gibbs Brook, LLC	Wareham, MA	6 GWh	Nov 2018	Dec 2024	Solar
BWC Origination 18	BWC Origination 18, LLC	Mattapoisett, MA	8 GWh	Nov 2018	Dec 2024	Solar
Barre Solar III LLC	AES Distributed Energy	Barre, MA	1 GWh	Feb 2018	Dec 2024	Solar
Dynamic - Walpole	AES Distributed Energy	Walpole, MA	3 GWh	May 2017	Dec 2024	Solar
North Stonington Solar Center, LLC	Adapture Renewables, Inc.	North Stonington, CT	30 GWh	Sep 2022	Dec 2024	Solar
Plymouth Solar	NSTAR Electric Company	Plymouth, MA	1 GWh	May 2018	Dec 2024	Solar
Pittsfield 44 - M&W PV	NSTAR Electric Company	Pittsfield, MA	2 GWh	Jul 2018	Dec 2024	Solar
Westminster Renewables, LLC CSG	Westminster Renewables, LLC	Westminster, MA	2 GWh	Sep 2018	Dec 2024	Solar
Monson Solar, LLC	Monson Solar, LLC	Monson, MA	3 GWh	Jul 2017	Dec 2024	Solar
Williamsburg	AES Distributed Energy	Goshen, MA	7 GWh	Jun 2019	Dec 2024	Solar
Dudley Solar CSG	Dudley Solar, LLC	Dudley, MA	3 GWh	Jul 2017	Dec 2024	Solar
Ashby Solar, LLC CSG	Ashby Solar, LLC	Fitchburg, MA	3 GWh	Jun 2018	Dec 2024	Solar
Griffin Road Solar, LLC CSG	Griffin Road Solar, LLC	Charlton, MA	3 GWh	Feb 2018	Dec 2024	Solar
East Bridgewater Solar	Altus Power America Management, LLC	East Bridgewater, MA	3 GWh	Oct 2017	Dec 2024	Solar
Hadley 2 Solar, LLC CSG	Hadley 2 Solar, LLC	Hadley, MA	3 GWh	Nov 2016	Dec 2024	Solar
Palmer	AES Distributed Energy	Palmer, MA	6 GWh	Sep 2019	Dec 2024	Solar
WED GW Solar, LLC	CleanCapital Holdings	Lincoln, RI	4 GWh	Dec 2018	Dec 2024	Solar
WED Shun III, LLC	WED Shun III, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2024	Wind
WED Shun II, LLC	WED Shun II, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2024	Wind
WED Plainfield, LLC	WED Plainfield, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2024	Wind
WED Plainfield III, LLC	WED Plainfield III, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2024	Wind
WED Plainfield II, LLC	WED Plainfield II, LLC	Johnston, RI	6 GWh	Dec 2018	Dec 2024	Wind
Ludlow Site 72 - Conti	NSTAR Electric Company	Ludlow, MA	2 GWh	Jul 2018	Dec 2024	Solar
East Springfield Solar PV	NSTAR Electric Company	Springfield, MA	2 GWh	Sep 2018	Dec 2024	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	522.6 GWh	4
#25	Dominion Energy South Carolina, Inc.	24.9 TWh	87
#13	Duke Energy Carolinas	112.2 TWh	565
#17	Duke Energy Progress East	64.7 TWh	559
#51	Duke Energy Progress West	4.6 TWh	10
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	34.1 TWh	25
#12	New York Independent System Operator	134.9 TWh	1,211
#1	PJM Interconnection, LLC	873.9 TWh	2,465
#31	South Carolina Public Service Authority	18.5 TWh	34
#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	173.0 TWh	2,075
#9	Tennessee Valley Authority	163.7 TWh	204
#10	Florida Power & Light Co.	151.0 TWh	187
#12	New York Independent System Operator	134.9 TWh	1,211
#13	Duke Energy Carolinas	112.2 TWh	565
#15	ISO New England	111.3 TWh	1,577
#16	Bonneville Power Administration	90.2 TWh	163
#17	Duke Energy Progress East	64.7 TWh	559
#18	PacifiCorp East	61.1 TWh	216
#19	Salt River Project Agricultural Improvement and Power District	60.1 TWh	48