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	Oct 2026
Annual Generation	112.2 TWh
Power Plants	1,667
Utilities	846
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% Nuclear \| 25.3% Wind \| 5.7% Water \| 4.6% Other Fuel \| 4.5% Solar \| 1.6% Coal \| 0%

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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
Depot Hill Solar CSG	CCC Solar Holdings LLC	Charlton, MA	3 GWh	Sep 2016	Dec 2025	Solar
Curtis Hill Solar CSG	CCC Solar Holdings LLC	Charlton, MA	3 GWh	Sep 2016	Dec 2025	Solar
MA Blackstone	Catalyze Blackstone 83 Federal Street Microgrid, LLC	Blackstone, MA	7 GWh	Jun 2022	Dec 2025	Solar
Maine Independence Station	Casco Bay Energy Co LLC	Veazie, ME	1 TWh	Apr 2000	Dec 2025	Natural Gas
HSCo CHP	Cartier Energy, LLC	Hartford, CT	28 GWh	Sep 2009	Dec 2025	Natural Gas
Hartford Hospital Cogeneration	Cartier Energy, LLC	Hartford, CT	49 GWh	Jun 1988	Dec 2025	Natural Gas
Golden Solar	Cardinal Renewables	St. Johnsbury, VT	4 GWh	Oct 2021	Dec 2025	Solar
Ravenbrook	Captona Ravenbrook LLC	Carver, MA	6 GWh	Nov 2013	Dec 2025	Solar
Plainfield Pike	Captona Plainfield Pike Johnston LLC	Johnston, RI	4 GWh	May 2019	Dec 2025	Solar
North Providence	Captona N.P. LLC	North Providence, RI	3 GWh	Sep 2018	Dec 2025	Solar
Gold Meadow Farms	Captona Lippitt Ave Cranston LLC	Cranston, RI	27 GWh	Apr 2019	Dec 2025	Solar
Kilvert	Captona Kilvert Street Warwick LLC	Warwick, RI	8 GWh	Nov 2018	Dec 2025	Solar
Hudson	Captona Hudson LLC	Hudson, MA	5 GWh	Apr 2017	Dec 2025	Solar
Chicopee	Captona Chicopee LLC	Chicopee, MA	2 GWh	Mar 2017	Dec 2025	Solar
Carver	Captona Carver LLC	North Carver, MA	2 GWh	Apr 2017	Dec 2025	Solar
Canton	Captona Canton LLC	Canton, MA	6 GWh	Jul 2012	Dec 2025	Solar
Berkley	Captona Berkley LLC	Berkley, MA	4 GWh	Mar 2017	Dec 2025	Solar
A Street 2	Captona A Street 2 Johnston LLC	Johnston, RI	3 GWh	Nov 2018	Dec 2025	Solar
A Street 1	Captona A Street 1 Johnston LLC	Johnston, RI	2 GWh	Nov 2018	Dec 2025	Solar
Canal	Canal Generating LLC	Sandwich, MA	467 GWh	May 1968	Jul 2026	Residual Fuel Oil : 59.3% Natural Gas : 28.9% Distillate Fuel Oil : 11.7%
Camelot Wind LLC	Camelot Wind LLC	Plymouth, MA	3 GWh	Sep 2012	Dec 2025	Wind
Fore River Generating Station	Calpine Fore River Energy Center, LLC	North Weymouth, MA	3 TWh	Jul 2003	Jul 2026	Natural Gas : 92.0% Distillate Fuel Oil : 8.0%
Lakeville Solar	C2 MA Lakeville, LLC	Lakeville, MA	3 GWh	Nov 2018	Dec 2025	Solar
BWC Wareham River	BWC Wareham River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
BWC Swan Pond River CSG	BWC Swan Pond River, LLC	Rehoboth, MA	3 GWh	Nov 2015	Dec 2025	Solar
BWC Pocasset River	BWC Pocasset River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
BWC Origination 8 LLC Sturbridge 2	BWC Origination 8 LLC Sturbridge 2 LLC	Sturbridge, MA	1 GWh	Aug 2017	Dec 2025	Solar
BWC Origination 8 LLC Sturbridge 1	BWC Origination 8 LLC Sturbridge 1 LLC	Sturbridge, MA	1 GWh	Jul 2017	Dec 2025	Solar
New Bedford (MA) Plymouth	BWC Origination 4, LLC	Plymouth, MA	7 GWh	Jun 2014	Dec 2025	Solar
BWC Origination 19	BWC Origination 19 LLC	Hopedale, MA	2 GWh	Jul 2017	Dec 2025	Solar
BWC Origination 18	BWC Origination 18, LLC	Mattapoisett, MA	7 GWh	Nov 2018	Dec 2025	Solar
BWC Mystic River	BWC Mystic River LLC	Mendon, MA	2 GWh	Jun 2017	Dec 2025	Solar
BWC Harlow Brook	BWC Harlow Brook, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2025	Solar
Westport B Community Solar Garden	BWC Hamilton Brook LLC	Westport, MA	8 GWh	Oct 2018	Dec 2025	Solar
BWC Gibbs Brook	BWC Gibbs Brook, LLC	Wareham, MA	7 GWh	Nov 2018	Dec 2025	Solar
Wilbraham	BWC East Brook, LLC	Wilbraham, MA	6 GWh	Nov 2020	Dec 2025	Solar
Adirondack A+B Community Solar Garden	BWC Connecticut River LLC	Westport, MA	9 GWh	Nov 2018	Dec 2025	Solar
Dover (MA)	BWC Buckmaster Pond LLC	Dover, MA	2 GWh	Jul 2017	Dec 2025	Solar
Mendon	BWC Box Pond LLC	Mendon, MA	3 GWh	Nov 2017	Dec 2025	Solar
Westport Community Solar Garden	BWC Bass River LLC	Westport, MA	2 GWh	Jun 2017	Dec 2025	Solar
Bullock Road Solar 1	Bullock Road Solar 1, LLC	Freetown, MA	4 GWh	Jun 2018	Dec 2025	Solar
Bucksport Generation LLC	Bucksport Generation LLC	Bucksport, ME	26 GWh	Jun 1965	Jul 2026	Natural Gas : 53.6% Distillate Fuel Oil : 46.4%
West Buxton	Brookfield White Pine Hydro LLC	Buxton, ME	21 GWh	Dec 1903	Dec 2025	Water
Charles E Monty	Brookfield White Pine Hydro LLC	Lewiston, ME	114 GWh	Dec 1989	Dec 2025	Water
Aziscohos Hydroelectric Project	Brookfield White Pine Hydro LLC	Wilson Mills, ME	30 GWh	May 1988	Dec 2025	Water
Bonny Eagle	Brookfield White Pine Hydro LLC	Hollis, ME	31 GWh	Dec 1909	Dec 2025	Water
Wyman Hydro	Brookfield White Pine Hydro LLC	Bingham, ME	295 GWh	Dec 1929	Dec 2025	Water
Brunswick Hydro	Brookfield White Pine Hydro LLC	Brunswick, ME	70 GWh	Feb 1982	Dec 2025	Water
Cataract Hydro	Brookfield White Pine Hydro LLC	Saco, ME	23 GWh	Dec 1936	Dec 2025	Water
Williams Hydro	Brookfield White Pine Hydro LLC	Solon, ME	64 GWh	Dec 1938	Dec 2025	Water
Weston Hydro	Brookfield White Pine Hydro LLC	Skowhegan, ME	57 GWh	Dec 1919	Dec 2025	Water
Skelton	Brookfield White Pine Hydro LLC	Dayton, ME	77 GWh	Dec 1947	Dec 2025	Water
Shawmut	Brookfield White Pine Hydro LLC	Shawmut, ME	23 GWh	Dec 1912	Dec 2025	Water
North Gorham	Brookfield White Pine Hydro LLC	Gorham, ME	6 GWh	Dec 1924	Dec 2025	Water
Hiram	Brookfield White Pine Hydro LLC	Hiram, ME	31 GWh	Dec 1916	Dec 2025	Water
Harris Hydro	Brookfield White Pine Hydro LLC	West Forks, ME	151 GWh	Dec 1953	Dec 2025	Water
Deer Rips	Brookfield White Pine Hydro LLC	Auburn, ME	51 GWh	Dec 1902	Dec 2025	Water
Gulf Island	Brookfield White Pine Hydro LLC	Lewiston, ME	115 GWh	Dec 1925	Dec 2025	Water
Rumford Falls Hydro Facility	Brookfield Power New England	Rumford, ME	212 GWh	Dec 1917	Dec 2025	Water
Stillwater B	Brookfield Black Bear Hydro, LLC	Old Town, ME	9 GWh	Aug 2013	Dec 2025	Water
Orono Hydro Station	Brookfield Black Bear Hydro, LLC	Orono, ME	6 GWh	Dec 2008	Dec 2025	Water
Medway Hydro	Brookfield Black Bear Hydro, LLC	Medway, ME	23 GWh	Dec 1922	Dec 2025	Water
Orono B	Brookfield Black Bear Hydro, LLC	Orono, ME	17 GWh	Oct 2013	Dec 2025	Water
Ellsworth Hydro Station	Brookfield Black Bear Hydro, LLC	Ellsworth, ME	18 GWh	Jun 1924	Dec 2025	Water
West Enfield Hydro	Brookfield Black Bear Hydro, LLC	West Enfield, ME	70 GWh	Mar 1988	Dec 2025	Water
Milford Hydro Station	Brookfield Black Bear Hydro, LLC	Milford, ME	36 GWh	Jun 1941	Dec 2025	Water
Stillwater Hydro Station	Brookfield Black Bear Hydro, LLC	Stillwater, ME	6 GWh	Dec 1912	Dec 2025	Water
Brook Street Solar 1 CSG	Brook Street Solar 1, LLC	Plympton, MA	3 GWh	Jul 2017	Dec 2025	Solar
Brockelman Road Solar 2	Brockelman Road Solar 2, LLC	Lancaster, MA	2 GWh	Jul 2021	Dec 2025	Solar
Bridgewater Power LP	Bridgewater Power Co LP	Bridgewater, NH	103 GWh	Jul 1987	Dec 2025	Wood/Wood Waste Solids : 99.8%
Bridgeport Fuel Cell, LLC	Bridgeport Fuel Cell, LLC	Bridgeport, CT	90 GWh	Nov 2013	Dec 2025	Natural Gas
Bridgeport Energy Project	Bridgeport Energy LLC	Bridgeport, CT	3 TWh	May 1998	Jul 2026	Natural Gas
Penacook Upper Falls Hydro	Briar-Hydro Associates	Penacook, NH	11 GWh	Nov 1986	Dec 2025	Water
Penacook Lower Falls	Briar-Hydro Associates	Boscawen, NH	16 GWh	Jul 1983	Dec 2025	Water
Rolfe Canal Hydro	Briar-Hydro Associates	Penacook, NH	16 GWh	Nov 1987	Dec 2025	Water
Breckenridge Solar	Breckenridge Street Solar 1, LLC	Palmer, MA	6 GWh	Oct 2020	Dec 2025	Solar
Brassua Hydroelectric Project	Brassua Hydroelectric LP	Rockwood, ME	13 GWh	Aug 1989	Aug 2025	Water
Bradford Solar	Bradford Solar, LLC	Haverhill, MA	7 GWh	Mar 2017	Dec 2025	Solar
Boston Medical Center CHP Plant	Boston Medical Center	Boston, MA	14 GWh	Mar 2017	Dec 2025	Natural Gas
Boott Hydropower	Boott Hydro, LLC - Hybrid	Lowell, MA	61 GWh	Sep 1985	Dec 2025	Water
Boltonville Hydro Associates	Boltonville Hydro Associates	Boltonville, VT	2 GWh	Jun 1984	Dec 2025	Water
Medtronic - New Haven	Bloom Energy	North Haven, CT	18 GWh	Sep 2020	Dec 2025	Natural Gas
One Patriot	Bloom Energy	Foxborough, MA	17 GWh	Nov 2019	Dec 2025	Natural Gas
CoreSite - Somerville	Bloom Energy	Somerville, MA	28 GWh	Aug 2020	Dec 2025	Natural Gas
Connecticut College	Bloom Energy	New London, CT	10 GWh	Aug 2019	Dec 2025	Natural Gas
Yale New Haven - New London	Bloom Energy	New London, CT	14 GWh	Aug 2022	Dec 2025	Natural Gas
Equinix - Billerica	Bloom Energy	Billerica, MA	14 GWh	Aug 2021	Dec 2025	Natural Gas
Medtronic - New Haven 2	Bloom Energy	North Haven, CT	17 GWh	Sep 2020	Dec 2025	Natural Gas
Blodgett Solar CSG	Blodgett Street Solar 1, LLC	Tyngsboro, MA	9 GWh	Jul 2021	Dec 2025	Solar
Sunpin Blandford	Blandford Sun, LLC	Southwick, MA	6 GWh	May 2020	Dec 2025	Solar
Blackstone/Tupperware	Blackstone Hydro Inc.	North Smithfield, RI	2 GWh	Dec 1980	Jul 2026	Water
Blacksmith Road Solar 1	Blacksmith Road Solar 1, LLC	Falmouth, MA	9 GWh	Nov 2021	Dec 2025	Solar
Bird Machine Solar Farm	Bird Machine Solar Farm, LLC	South Walpole, MA	6 GWh	Jul 2017	Dec 2025	Solar
Berwick Hubbard Solar 1	Berwick Hubbard Solar 1, LLC	Berwick, ME	6 GWh	Nov 2024	Dec 2025	Solar
Burgess BioPower	Berlin Station, LLC	Berlin, NH	390 GWh	Oct 2013	Dec 2025	Wood/Wood Waste Solids
Berkshire Power	Berkshire Power Co LLC	Agawam, MA	810 GWh	Aug 1999	Dec 2025	Natural Gas
ANP Bellingham Energy Project	Bellingham Power Generation LLC	Bellingham, MA	3 TWh	Oct 2002	Jul 2026	Natural Gas
Belchertown Renewables Community Solar	Belchertown Renewables, LLC	Belchertown, MA	6 GWh	Feb 2018	Dec 2025	Solar
Palmyra PV - BD Solar Palmyra LLC	BD Solar Palmyra LLC	Palmyra, ME	8 GWh	May 2022	Dec 2025	Solar
Oxford PV - BD Solar Oxford LLC	BD Solar Oxford LLC	Oxford, ME	13 GWh	May 2021	Dec 2025	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	433.0 GWh	4
#24	Dominion Energy South Carolina, Inc.	26.1 TWh	83
#13	Duke Energy Carolinas	113.4 TWh	578
#17	Duke Energy Progress East	66.2 TWh	574
#50	Duke Energy Progress West	4.6 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	34.2 TWh	25
#12	New York Independent System Operator	134.1 TWh	1,334
#1	PJM Interconnection, LLC	890.9 TWh	2,806
#28	South Carolina Public Service Authority	19.6 TWh	35
#59	Southeastern Power Administration	1.2 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	168.7 TWh	2,170
#9	Tennessee Valley Authority	166.2 TWh	209
#10	Florida Power & Light Co.	153.0 TWh	188
#12	New York Independent System Operator	134.1 TWh	1,334
#13	Duke Energy Carolinas	113.4 TWh	578
#15	ISO New England	112.2 TWh	1,667
#16	Bonneville Power Administration	91.1 TWh	170
#17	Duke Energy Progress East	66.2 TWh	574
#18	PacifiCorp East	61.4 TWh	223
#19	Salt River Project Agricultural Improvement and Power District	60.5 TWh	51