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
Mine Falls Generating Station	City of Nashua - (NH)	Nashua, NH	9 GWh	Nov 1985	Dec 2025	Water
Anson Abenaki Hydros	Eagle Creek Renewable Energy, LLC	Madison, ME	101 GWh	Dec 1949	Dec 2025	Water
West Enfield Hydro	Brookfield Black Bear Hydro, LLC	West Enfield, ME	70 GWh	Mar 1988	Dec 2025	Water
Bridgewater Power LP	Bridgewater Power Co LP	Bridgewater, NH	103 GWh	Jul 1987	Dec 2025	Wood/Wood Waste Solids : 99.8%
Bellingham Cogeneration Facility	Northeast Energy Associates LP	Bellingham, MA	318 GWh	Aug 1991	Dec 2025	Natural Gas : 95.7% Distillate Fuel Oil : 4.3%
ReEnergy Livermore Falls	ReEnergy Livermore Falls	Livermore Falls, ME	274 GWh	Jul 1992	Dec 2025	Wood/Wood Waste Solids
Clark University	Clark University	Worcester, MA	4 GWh	Dec 2012	Dec 2025	Natural Gas
Rumford Falls Hydro Facility	Brookfield Power New England	Rumford, ME	212 GWh	Dec 1917	Dec 2025	Water
Sheldon Springs Hydroelectric	Central Rivers Power US, LLC	Sheldon Springs, VT	52 GWh	Jun 1988	Dec 2025	Water
Milton Hydro	SFR Hydro Cor	Milton, NH	5 GWh	Dec 1913	Dec 2025	Water
Benton Falls Associates	Essex Hydro Associates LLC	Benton, ME	10 GWh	Nov 1987	Dec 2025	Water
Dodge Falls Associates	Dodge Falls Associates LP	Bath, NH	22 GWh	Nov 1990	Dec 2025	Water
Boott Hydropower	Boott Hydro, LLC - Hybrid	Lowell, MA	61 GWh	Sep 1985	Dec 2025	Water
Errol Hydroelectric Project	Errol Hydroelectric Co LLC	Errol, NH	14 GWh	Oct 1986	Dec 2025	Water
Gilman Mill	Ampersand Gilman Hydro LP	Gilman, VT	2 GWh	Dec 1940	Dec 2025	Water
Masspower	Masspower	Indian Orchard, MA	442 GWh	Jun 1993	Dec 2025	Natural Gas
Barker Lower	KEI (Maine) Power Management (III) LLC	Auburn, ME	4 GWh	Mar 1986	Dec 2025	Water
NE Renewable Power West Enfield	Stored Solar J&WE	West Enfield, ME	43 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids
Oakdale Power Station	Massachusetts Water Res Auth	West Boylston, MA	1 GWh	Apr 1951	Dec 2025	Water
NE Renewable Springfield, LLC	NE Renewable Springfield, LLC	Springfield, NH	73 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids
NE Renewable Whitefield, LLC	NE Renewable Whitefield, LLC	Whitefield, NH	59 GWh	Feb 1988	Dec 2025	Wood/Wood Waste Solids
Medical Area Total Energy Plant	MATEP LLC	Boston, MA	314 GWh	Dec 1979	Dec 2025	Natural Gas : 99.0% Distillate Fuel Oil : 1.0%
International Paper Jay Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	12 GWh	Dec 1911	Dec 2025	Water
International Paper Riley Hydro	Eagle Creek Renewable Energy, LLC	Jay, ME	20 GWh	Nov 1981	Dec 2025	Water
International Paper Livermore Hydro	Eagle Creek Renewable Energy, LLC	Livermore Falls, ME	24 GWh	Dec 1909	Dec 2025	Water
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%
China Mill Hydro	New Hampshire Hydro Associates	Allenstown, NH	3 GWh	Jun 1981	Dec 2025	Water
Ottauquechee Hydro	Green Mountain Power Corp	N. Hartland, VT	3 GWh	Mar 1983	Dec 2025	Water
International Paper Woronoco Mill	Eagle Creek Renewable Energy, LLC	Woronoco, MA	7 GWh	Dec 1912	Dec 2025	Water
Worumbo Hydro Station	Eagle Creek Renewable Energy, LLC	Lisbon Falls, ME	74 GWh	Jan 1989	Dec 2025	Water
Lower Village Water Power Project	Sugar River Power LLC	Claremont, NH	3 GWh	Apr 1995	Dec 2025	Water
Pembroke Hydro	Eagle Creek Renewable Energy, LLC	Suncook, NH	7 GWh	Nov 1985	Dec 2025	Water
Newfound Hydroelectric	Eagle Creek Renewable Energy, LLC	Bristol, NH	4 GWh	Nov 1983	Dec 2025	Water
Rolfe Canal Hydro	Briar-Hydro Associates	Penacook, NH	16 GWh	Nov 1987	Dec 2025	Water
Penacook Lower Falls	Briar-Hydro Associates	Boscawen, NH	16 GWh	Jul 1983	Dec 2025	Water
Ridgewood Providence Power	Rhode Island LFG Genco	Johnston, RI	4 GWh	Jul 2005	Dec 2025	Landfill Gas
Gregg Falls	Eagle Creek Renewable Energy, LLC	Goffstown, NH	8 GWh	Nov 1985	Dec 2025	Water
Penacook Upper Falls Hydro	Briar-Hydro Associates	Penacook, NH	11 GWh	Nov 1986	Dec 2025	Water
S D Warren Westbrook	Relevate Power Management LLC	Westbrook, ME	15 GWh	Dec 1902	Dec 2025	Water
Boltonville Hydro Associates	Boltonville Hydro Associates	Boltonville, VT	2 GWh	Jun 1984	Dec 2025	Water
Lawrence Hydroelectric Associates	Central Rivers Power US, LLC	Lawrence, MA	59 GWh	Jun 1981	Dec 2025	Water
New Milford Gas Recovery	WM Renewable Energy LLC	New Milford, CT	4 GWh	Apr 2008	Dec 2025	Landfill Gas
ReEnergy Stratton LLC	ReEnergy Stratton LLC	Stratton, ME	200 GWh	Oct 1989	Dec 2025	Wood/Wood Waste Solids
Pumpkin Hill	KEI (Maine) Power Management (II) LLC	Lowell, ME	3 GWh	Feb 1987	Dec 2025	Water
Salmon Falls	Green Mountain Power Corp	South Berwick, ME	2 GWh	Jun 1986	Dec 2025	Water
Somersworth Lower Great Dam	Green Mountain Power Corp	Somersworth, NH	498 MWh	Jun 1985	Dec 2025	Water
Huntington Falls	Green Mountain Power Corp	Weybridge, VT	12 GWh	Sep 1988	Dec 2025	Water
NE Renewable Tamworth, LLC	NE Renewable Tamworth, LLC	Tamworth, NH	78 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids
Pontook Hydro Facility	Pontook Operating LP	Dummer, NH	51 GWh	Nov 1986	Dec 2025	Water
Pejepscot Hydroelectric Project	Topsham Hydro Partners	Topsham, ME	50 GWh	Oct 1987	Dec 2025	Water
Aziscohos Hydroelectric Project	Brookfield White Pine Hydro LLC	Wilson Mills, ME	30 GWh	May 1988	Dec 2025	Water
Ryegate Associates, LLC	Ryegate Associates, LLC	East Ryegate, VT	158 GWh	Aug 1992	Dec 2025	Wood/Wood Waste Solids
Ocean State Power	Ocean State Power Co	Harrisville, RI	1 TWh	Nov 1990	Dec 2025	Natural Gas : 99.7%
Dartmouth Power Associates LP	Dartmouth Energy Center	Dartmouth, MA	89 GWh	Feb 1992	Dec 2025	Natural Gas : 96.7% Distillate Fuel Oil : 3.3%
Hartford Hospital Cogeneration	Cartier Energy, LLC	Hartford, CT	49 GWh	Jun 1988	Dec 2025	Natural Gas
Upper Barker	KEI (Maine) Power Management (III) LLC	Auburn, ME	4 GWh	Apr 1987	Dec 2025	Water
Mechanic Falls	KEI (Maine) Power Management (IV) LLC	Mechanic Falls, ME	2 GWh	Mar 1986	Dec 2025	Water
Pittsfield Hydro	KEI (Maine) Power Management (II) LLC	Burnham, ME	3 GWh	Jun 1986	Dec 2025	Water
Great Lakes Hydro America - ME	Great Lakes Hydro America LLC	Millinocket, ME	500 GWh	Jun 1917	Dec 2025	Water
Ocean State Power II	Ocean State Power II	Harrisville, RI	577 GWh	Sep 1991	Dec 2025	Natural Gas : 99.9%
Chace Mill Winooski One	City of Burlington Electric - (VT)	Winooski, VT	17 GWh	Mar 1993	Dec 2025	Water
EHC West Hopkinton	Green Mountain Power Corp	West Hopkinton, NH	1 GWh	Jun 1985	Dec 2025	Water
Rollinsford	Green Mountain Power Corp	Rollinsford, NH	3 GWh	Sep 1986	Dec 2025	Water
Mascoma Hydro	Green Mountain Power Corp	W. Lebanon, NH	202 MWh	Nov 1988	Dec 2025	Water
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%
Berlin Gorham	Great Lakes Hydro America LLC	Berlin, NH	101 GWh	Dec 1913	Dec 2025	Water
Turnkey Landfill Gas Recovery	WM Renewable Energy LLC	Rochester, NH	39 GWh	Jan 1992	Dec 2025	Landfill Gas
Milford Power LP	Milford Power LLC	Milford, MA	253 GWh	Feb 1993	Dec 2025	Natural Gas
Mass Inst Tech Cntrl Utilities/Cogen Plt	Massachusetts Inst of Tech	Cambridge, MA	209 GWh	May 1995	Dec 2025	Natural Gas
Wellesley College Central Utility Plant	Wellesley College	Wellesley, MA	10 GWh	May 1985	Dec 2025	Natural Gas
Nashua Plant	NextEra Renewable Fuels, LLC	Nashua, NH	13 GWh	Mar 1996	Dec 2025	Landfill Gas
Dighton Power Plant	Dighton Power, LLC	Dighton, MA	276 GWh	Apr 1999	Dec 2025	Natural Gas
Berkshire Power	Berkshire Power Co LLC	Agawam, MA	810 GWh	Aug 1999	Dec 2025	Natural Gas
Tiverton Power Plant	Tiverton Power LLC	Tiverton, RI	2 TWh	Feb 2000	Dec 2025	Natural Gas
Maine Independence Station	Casco Bay Energy Co LLC	Veazie, ME	1 TWh	Apr 2000	Dec 2025	Natural Gas
MM Taunton Energy	MM Taunton Energy LLC	Taunton, MA	7 GWh	Aug 1997	Dec 2025	Landfill Gas
Rumford Power LLC	Rumford Power	Rumford, ME	793 GWh	Jun 2000	Dec 2025	Natural Gas
Medway Hydro	Brookfield Black Bear Hydro, LLC	Medway, ME	23 GWh	Dec 1922	Dec 2025	Water
Wallingford Energy	Wallingford Energy LLC	Wallingford, CT	107 GWh	Jul 2001	Dec 2025	Natural Gas
Quinebaug Lower Project	Quinebaug Associates LLC	Brooklyn, CT	5 GWh	Mar 1990	Dec 2025	Water
Waterside Power, LLC	Waterside Power, LLC	Stamford, CT	2 GWh	May 2003	Dec 2025	Distillate Fuel Oil
Ameresco Chicopee Energy	AMERESCO Chicopee Energy LLC	Chicopee, MA	4 GWh	Jan 2004	Dec 2025	Landfill Gas
Fitchburg Gas Recovery	WM Renewable Energy LLC	Westminster, MA	32 GWh	Sep 2007	Dec 2025	Landfill Gas
Waterbury Generation	Engie North America	Waterbury, CT	55 GWh	May 2009	Dec 2025	Natural Gas : 99.1% Kerosene : 0.9%
Plainfield Renewable Energy LLC	Plainfield Renewable Energy, LLC	Plainfield, CT	245 GWh	Nov 2013	Dec 2025	Wood/Wood Waste Solids : 99.3% Other Biomass Liquids : 0.7%
Fairfield University CHP Plant	Fairfield University	Fairfield, CT	23 GWh	Sep 2007	Dec 2025	Natural Gas
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
Stetson Wind II	Evergreen Wind, LLC	Danforth, ME	55 GWh	Feb 2010	Dec 2025	Wind
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	22 GWh	Feb 2009	Dec 2025	Landfill Gas
GenConn Middletown LLC	GenConn Middletown LLC	Middletown, CT	6 GWh	May 2011	Dec 2025	Kerosene : 77.4% Natural Gas : 22.6%
GenConn Devon LLC	GenConn Devon LLC	Milford, CT	15 GWh	May 2010	Dec 2025	Kerosene : 75.4% Natural Gas : 24.6%
Bull Hill Wind Project	Evergreen Wind, LLC	Eastbrook, ME	66 GWh	Sep 2012	Dec 2025	Wind
Beaver Ridge Wind	CPV Beaver Ridge Wind LLC	Freedom, ME	11 GWh	Oct 2008	Dec 2025	Wind
HSCo CHP	Cartier Energy, LLC	Hartford, CT	28 GWh	Sep 2009	Dec 2025	Natural Gas
Orono Hydro Station	Brookfield Black Bear Hydro, LLC	Orono, ME	6 GWh	Dec 2008	Dec 2025	Water
MA Military Reservation Wind Project	Air Force Civil Engineer Center	Otis ANG Base Bourne, MA	5 GWh	Nov 2009	Dec 2025	Wind
Dorchester Solar Site	Massachusetts Electric Co	Dorchester, MA	2 GWh	Dec 2011	Dec 2025	Solar
Haverhill Solar Power Project	Massachusetts Electric Co	Haverhill, MA	1 GWh	Nov 2010	Dec 2025	Solar
NEDC Solar Site	Massachusetts Electric Co	Whitinsville, MA	953 MWh	May 2010	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