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
SR Litchfield	SR Litchfield, LLC	Litchfield, CT	26 GWh	Jan 2025	Dec 2025	Solar
Falls Village	FirstLight Power Resources Services LLC	Falls Village, CT	26 GWh	Dec 1913	Dec 2025	Water
Georgia Mountain Community Wind Farm	Greenbacker Renewable Energy Corporation	Milton, VT	25 GWh	Nov 2012	May 2026	Wind
Peterson	Green Mountain Power Corp	Milton, VT	25 GWh	Jan 1948	Dec 2025	Water
Frito Lay Incorporated	Frito Lay Incorporated Dayville	Dayville, CT	25 GWh	Feb 2009	May 2026	Natural Gas
Coolidge Solar 1, LLC	Coolidge Solar I, LLC	Ludlow, VT	25 GWh	Nov 2018	May 2026	Solar
Garvins Falls	Central Rivers Power NH, LLC	Bow, NH	25 GWh	Jul 1925	Dec 2025	Water
Milo PV - BD Solar 1 LLC	BD Solar 1 LLC	Milo, ME	25 GWh	May 2021	Dec 2025	Solar
International Paper Livermore Hydro	Eagle Creek Renewable Energy, LLC	Livermore Falls, ME	24 GWh	Dec 1909	Dec 2025	Water
Alton Road Solar	Revity Energy LLC	Bradford, RI	24 GWh	Nov 2019	Dec 2025	Solar
SJA Solar LLC-Solterra Monastery CSG	SJA Solar, LLC	Spencer, MA	24 GWh	Nov 2016	Dec 2025	Solar
Shawmut	Brookfield White Pine Hydro LLC	Shawmut, ME	23 GWh	Dec 1912	Dec 2025	Water
Fairfield University CHP Plant	Fairfield University	Fairfield, CT	23 GWh	Sep 2007	Dec 2025	Natural Gas
Cataract Hydro	Brookfield White Pine Hydro LLC	Saco, ME	23 GWh	Dec 1936	Dec 2025	Water
Medway Hydro	Brookfield Black Bear Hydro, LLC	Medway, ME	23 GWh	Dec 1922	Dec 2025	Water
Derby Hydro	McCallum Enterprises I LP	Shelton, CT	23 GWh	Dec 1988	Dec 2025	Water
Jericho Power	Jericho Power LLC	Berlin, NH	23 GWh	Dec 2015	May 2026	Wind
Riverside Holyoke	City of Holyoke Gas and Elec Dept - (MA)	Holyoke, MA	22 GWh	Dec 1905	Dec 2025	Water
West Groton CHP	Hollingsworth & Vose Co West Groton	Groton, MA	22 GWh	Nov 2015	Dec 2024	Natural Gas
Eastman Falls	Central Rivers Power NH, LLC	Franklin, NH	22 GWh	Jul 1937	Dec 2025	Water
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	22 GWh	Feb 2009	Dec 2025	Landfill Gas
Rainbow (CT)	Farmington River Power Company	Windsor, CT	22 GWh	Nov 1925	May 2026	Water
Dodge Falls Associates	Dodge Falls Associates LP	Bath, NH	22 GWh	Nov 1990	Dec 2025	Water
Danbury Hospital Cogen Plant	Danbury Hospital	Danbury, CT	22 GWh	Oct 2011	Dec 2025	Natural Gas
Woods Hill Solar	Woods Hill Solar, LLC	Pomfret, CT	22 GWh	Nov 2018	May 2026	Solar
Deerfield 4	Great River Hydro, LLC	Buckland, MA	21 GWh	Jul 1912	Dec 2025	Water
West Buxton	Brookfield White Pine Hydro LLC	Buxton, ME	21 GWh	Dec 1903	Dec 2025	Water
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	21 GWh	Jul 2015	May 2026	Natural Gas
International Paper Riley Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	20 GWh	Nov 1981	Dec 2025	Water
Medway Grid	Medway Grid LLC	Medway, MA	20 GWh	-	May 2026	Electricity used for energy storage
Central Power Plant	State of Rhode Island	Cranston, RI	19 GWh	Jul 1958	Mar 2026	Natural Gas : 97.5% Distillate Fuel Oil : 2.5%
TPE King Solar Holdings1, LLC (CSG)	Nautilus Solar Solutions	North Smithfield, RI	18 GWh	Mar 2022	Dec 2025	Solar
Rhode Island Solar Renewable Energy IV,	Rhode Island Solar Renewable Energy IV, LLC	Tiverton, RI	18 GWh	Nov 2023	Dec 2025	Solar
Ellsworth Hydro Station	Brookfield Black Bear Hydro, LLC	Ellsworth, ME	18 GWh	Jun 1924	Dec 2025	Water
Medtronic - New Haven	Bloom Energy	North Haven, CT	18 GWh	Sep 2020	Dec 2025	Natural Gas
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	18 GWh	Oct 2015	May 2026	Natural Gas : 84.7% Solar : 15.3%
Orono B	Brookfield Black Bear Hydro, LLC	Orono, ME	17 GWh	Oct 2013	Dec 2025	Water
Barrett PV	MN8 Energy LLC	Oxford, MA	17 GWh	Oct 2016	Dec 2025	Solar
Chace Mill Winooski One	City of Burlington Electric - (VT)	Winooski, VT	17 GWh	Mar 1993	Dec 2025	Water
Medtronic - New Haven 2	Bloom Energy	North Haven, CT	17 GWh	Sep 2020	Dec 2025	Natural Gas
One Patriot	Bloom Energy	Foxborough, MA	17 GWh	Nov 2019	Dec 2025	Natural Gas
UI RCP Woodbridge FC	United Illuminating Co	Woodbridge, CT	17 GWh	Nov 2016	Dec 2025	Natural Gas
Rolfe Canal Hydro	Briar-Hydro Associates	Penacook, NH	16 GWh	Nov 1987	Dec 2025	Water
Exeter Renewables 1	AES Clean Energy	Exeter, RI	16 GWh	Nov 2024	Dec 2025	Solar
Fairfax Falls	Green Mountain Power Corp	Fairfax, VT	16 GWh	Jan 1919	Dec 2025	Water
Hope Farm Solar, LLC	Adapture Renewables, Inc.	Cranston, RI	16 GWh	Aug 2019	Dec 2025	Solar
Penacook Lower Falls	Briar-Hydro Associates	Boscawen, NH	16 GWh	Jul 1983	Dec 2025	Water
Searsburg	Great River Hydro, LLC	Searsburg, VT	16 GWh	Feb 1922	Dec 2025	Water
GD Hopkinton Main I, LLC	GD Hopkinton Main I, LLC	Hopkinton, RI	16 GWh	Oct 2020	Dec 2025	Solar
UDR Glastonbury Fuel Cell	UIL Distributed Resources, LLC	Glastonbury, CT	16 GWh	Jan 2016	Dec 2025	Natural Gas
Pittsfield Solar LLC	Pittsfiled Solar LLC	Pittsfield, ME	15 GWh	Nov 2017	Dec 2025	Solar
Pepperidge Farm Bloomfield	Pepperidge Farm, Inc.- Bloomfield	Bloomfield, CT	15 GWh	Jul 2008	Dec 2024	Natural Gas
Wallingford Solar	Wallingford Renewable Energy, LLC	Wallingford, CT	15 GWh	Aug 2021	Dec 2025	Solar
Gorge 18	Green Mountain Power Corp	South Burlington, VT	15 GWh	Dec 1927	Dec 2025	Water
GenConn Devon LLC	GenConn Devon LLC	Milford, CT	15 GWh	May 2010	Dec 2025	Kerosene : 75.4% Natural Gas : 24.6%
GDIM 3, LLC	GDIM 3, LLC	North Smithfield, RI	15 GWh	Nov 2021	Dec 2025	Solar
S D Warren Westbrook	Relevate Power Management LLC	Westbrook, ME	15 GWh	Dec 1902	Dec 2025	Water
SR North Stonington	SR North Stonington, LLC	North Stonington, CT	15 GWh	Feb 2024	Dec 2025	Solar
GDIM 1, LLC	GDIM 1, LLC	North Smithfield, RI	15 GWh	Nov 2021	Dec 2025	Solar
Equinix - Billerica	Bloom Energy	Billerica, MA	14 GWh	Aug 2021	Dec 2025	Natural Gas
GDIM 4, LLC	GDIM 4, LLC	North Smithfield, RI	14 GWh	Nov 2021	Dec 2025	Solar
0 Hammond St CSG	0HAM WHAM8 Solar, LLC	Carver, MA	14 GWh	Sep 2021	Dec 2024	Solar
Clark Falls	Green Mountain Power Corp	Milton, VT	14 GWh	Jan 1937	Dec 2025	Water
Kearsarge Smithfield LLC	Kearsarge Smithfield LLC	Burrillville, RI	14 GWh	Mar 2023	Dec 2025	Solar
Boston Medical Center CHP Plant	Boston Medical Center	Boston, MA	14 GWh	Mar 2017	Dec 2025	Natural Gas
Yale New Haven - New London	Bloom Energy	New London, CT	14 GWh	Aug 2022	Dec 2025	Natural Gas
Errol Hydroelectric Project	Errol Hydroelectric Co LLC	Errol, NH	14 GWh	Oct 1986	Dec 2025	Water
Greater New Bedford LFG Utiliz. Facility	CommonWealth New Bedford Energy LLC	New Bedford, MA	13 GWh	Sep 2005	Dec 2025	Landfill Gas
Nashua Plant	NextEra Renewable Fuels, LLC	Nashua, NH	13 GWh	Mar 1996	Dec 2025	Landfill Gas
Tank Farm 4	Solar Breakers LLC	Portsmouth, RI	13 GWh	Sep 2022	Dec 2025	Solar
Lockwood Hydroelectric Facility	Merimil Ltd Partnership	Waterville, ME	13 GWh	Sep 1985	Dec 2025	Water
Newport	Great Bay Hydro Corp	Newport, VT	13 GWh	Dec 1935	Dec 2025	Water
Oxford PV - BD Solar Oxford LLC	BD Solar Oxford LLC	Oxford, ME	13 GWh	May 2021	Dec 2025	Solar
GDIM 2, LLC	GDIM 2, LLC	North Smithfield, RI	13 GWh	Nov 2021	Dec 2025	Solar
Brassua Hydroelectric Project	Brassua Hydroelectric LP	Rockwood, ME	13 GWh	Aug 1989	Aug 2025	Water
Future Generation Wind	RWE Clean Energy	Plymouth, MA	12 GWh	Jul 2016	Nov 2025	Wind
Huntington Falls	Green Mountain Power Corp	Weybridge, VT	12 GWh	Sep 1988	Dec 2025	Water
Turners Falls	FirstLight Power Resources, Inc. - MA	Montague, MA	12 GWh	Dec 1904	Dec 2025	Water
International Paper Jay Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	12 GWh	Dec 1911	Dec 2025	Water
Cellu Tissue	Dunn Paper East Hartford, LLC	East Hartford, CT	12 GWh	Apr 2009	May 2026	Natural Gas
Boatlock	City of Holyoke Gas and Elec Dept - (MA)	Holyoke, MA	12 GWh	Dec 1920	Dec 2025	Water
Holiday Hill Community Wind	Greenbacker Renewable Energy Corporation	Russell, MA	12 GWh	Nov 2019	Dec 2025	Wind
Trinity College Fuel Cell	Onsite Partners, LLC	Hartford, CT	12 GWh	Jul 2018	Dec 2024	Natural Gas
White Rock Road LLC	White Rock Road LLC	Westerly, RI	11 GWh	Nov 2022	Dec 2025	Solar
Gardners Falls	Central Rivers Power MA, LLC	Buckland, MA	11 GWh	Dec 1913	Dec 2025	Water
Waterbury 22	Green Mountain Power Corp	Waterbury, VT	11 GWh	May 1953	Dec 2025	Water
BD Solar Hancock LLC	BD Solar Hancock LLC	Augusta, ME	11 GWh	May 2022	Dec 2025	Solar
59 Federal Rd(CSG)	59FED WHAM8 Solar, LLC	Carver, MA	11 GWh	Oct 2021	Dec 2024	Solar
Bradley Energy Center	Ameresco Select Inc	Windsor Locks, CT	11 GWh	Oct 2002	Dec 2025	Natural Gas
Penacook Upper Falls Hydro	Briar-Hydro Associates	Penacook, NH	11 GWh	Nov 1986	Dec 2025	Water
Beaver Ridge Wind	CPV Beaver Ridge Wind LLC	Freedom, ME	11 GWh	Oct 2008	Dec 2025	Wind
Foxwoods CoGen	Foxwoods Resort Casino	Mashantucket, CT	11 GWh	May 2010	Dec 2025	Natural Gas
Putts Bridge	Central Rivers Power MA, LLC	Ludlow, MA	11 GWh	Dec 1917	Dec 2025	Water
Dartmouth College Heating Plant	Dartmouth College	Hanover, NH	11 GWh	Dec 1969	May 2026	Residual Fuel Oil
Wind Colebrook South	Wind Colebrook South	Colebrook, CT	11 GWh	Oct 2015	May 2026	Wind
Quarry	Nautilus Solar Solutions	North Berwick, ME	10 GWh	Nov 2022	Dec 2025	Solar
Winslow PV - BD Solar 2 LLC	BD Solar 2 LLC	Winslow, ME	10 GWh	Jun 2022	Dec 2025	Solar
Huxley Solar	Agilitas Energy, Inc.	Ludlow, MA	10 GWh	Nov 2022	Dec 2025	Solar
Connecticut College	Bloom Energy	New London, CT	10 GWh	Aug 2019	Dec 2025	Natural Gas
276 Federal Rd(CSG)	276FED WHAM8 Solar, LLC	Carver, MA	10 GWh	Oct 2021	Dec 2024	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