ISO New England

Balancing Authority Summary Information

ISO New England is ranked #15 out of 65 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	May 2025
Annual Generation	103.5 TWh
Power Plants	1,487
Utilities	782
Ranked #15 out of 65 in terms of net annual generation
Ranked #11 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 57.5% Nuclear \| 24.6% Water \| 6.1% Other Fuel \| 4.5% Wind \| 3.6% Solar \| 1.4% Coal \| 0.3%

Map of ISO New England

Register Now for Comprehensive Access

Subscribe now to access all power plant data, utility information, FERC EQR data, and more for ISO New England.

Create Your Account Today

Daily Net Generation for ISO New England for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Hampton Facility	Foss Manufacturing Company LLC	Hampton, NH	22 GWh	Sep 1978	Mar 2025	Natural Gas
Mt Wachusett Community College	Mt Wachusett Community College	Gardner, MA	5 GWh	Feb 2011	Mar 2025	Wind
Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, CT	99 GWh	Sep 1995	Mar 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Saugus	Wheelabrator Environmental Systems	Saugus, MA	231 GWh	Jul 1985	Mar 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Hancock Wind Plant	Onward Energy	T22 MD, ME	118 GWh	Nov 2016	Mar 2025	Wind
UNH 7.9 MW Plant	Emcor Energy Services	Durham, NH	50 GWh	Aug 2006	Mar 2025	Landfill Gas : 75.0% Natural Gas : 23.3% Distillate Fuel Oil : 1.8%
Covanta Southeastern Connecticut Company	Covanta Southeastern Connecticut Company	Preston, CT	112 GWh	Nov 1991	Mar 2025	Non-biogenic Municipal Solid Waste : 54.2% Biogenic Municipal Solid Waste : 44.4% Distillate Fuel Oil : 1.4%
Millennium Power	Millennium Power Company, LLC	Charlton, MA	465 GWh	Mar 2001	Mar 2025	Natural Gas
Covanta Haverhill	Ogden Projects Inc-Haverhill	Haverhill, MA	298 GWh	Apr 1989	Mar 2025	Non-biogenic Municipal Solid Waste : 54.8% Biogenic Municipal Solid Waste : 44.8%
Groton Wind LLC	Avangrid Renewables LLC	Groton, NH	110 GWh	Nov 2012	Mar 2025	Wind
Rainbow (CT)	Farmington River Power Company	Windsor, CT	22 GWh	Nov 1925	Mar 2025	Water
WED Coventry 6	Greenbacker Renewable Energy Corporation	Coventry, RI	7 GWh	Jul 2016	Mar 2025	Wind
Jericho Power	Jericho Power LLC	Berlin, NH	21 GWh	Dec 2015	Mar 2025	Wind
Kingdom Community Wind	Green Mountain Power Corp	Lowell, VT	181 GWh	Oct 2012	Mar 2025	Wind
Erving Paper Mills	Erving Paper Mills Inc	Erving, MA	43 GWh	Nov 2013	Mar 2025	Natural Gas : 98.0% Distillate Fuel Oil : 2.0%
Rumford Cogeneration	ND Paper, Inc.	Rumford, ME	430 GWh	Dec 1989	Mar 2025	Black Liquor : 53.8% Tire-derived Fuels : 22.8% Wood/Wood Waste Solids : 11.8% Bituminous Coal : 7.4% Residual Fuel Oil : 3.1% Sludge Waste : 1.0%
Millstone	Dominion Energy Nuclear Conn Inc	Waterford, CT	17 TWh	Nov 1975	Mar 2025	Nuclear
Bridgeport Station	Generation Bridge II Connecticut, LLC	Bridgeport, CT	3 TWh	Jul 1961	Mar 2025	Natural Gas : 98.6% Distillate Fuel Oil : 1.4%
Fort Hill 1, 2, 3 & 4	Connecticut Mun Elec Engy Coop	Uncasville, CT	519 MWh	Jul 2010	Mar 2025	Distillate Fuel Oil
Oakfield Wind Project	Onward Energy	City of Oakfield, ME	355 GWh	Sep 2015	Mar 2025	Wind
J C McNeil	City of Burlington Electric - (VT)	Burlington, VT	202 GWh	May 1984	Mar 2025	Wood/Wood Waste Solids : 99.8%
CPV Towantic Energy Center	CPV Towantic, LLC	Oxford, CT	6 TWh	Apr 2018	Mar 2025	Natural Gas
Pratt & Whitney	United Technologies	East Hartford, CT	92 GWh	Dec 1991	Mar 2025	Natural Gas
West Greenwich Solar	Consolidated Edison Development Inc.	West Greenwich, RI	3 GWh	Apr 2013	Mar 2025	Solar
UCONN Cogen Facility	University of Connecticut	Storrs, CT	124 GWh	Feb 2006	Mar 2025	Natural Gas : 98.9% Distillate Fuel Oil : 1.1%
Cellu Tissue	Dunn Paper East Hartford, LLC	East Hartford, CT	12 GWh	Apr 2009	Mar 2025	Natural Gas
Fusion Solar Center LLC	Fusion Solar Centre, L.L.C	Baltic, CT	40 GWh	Feb 2018	Mar 2025	Solar
NBC Field's Point Wind Farm	Narragansett Bay Commission	Providence, RI	6 GWh	Sep 2012	Mar 2025	Wind
Backus Microgrid Project	Connecticut Mun Elec Engy Coop	Norwich, CT	913 MWh	Jul 2014	Mar 2025	Distillate Fuel Oil
Frito Lay Incorporated	Frito Lay Incorporated Dayville	Dayville, CT	24 GWh	Feb 2009	Mar 2025	Natural Gas
Middlebury College	Middlebury College Biomass	Middlebury, VT	2 GWh	Dec 1979	Mar 2025	Wood/Wood Waste Solids : 72.8% Natural Gas : 27.1%
Blackstone/Tupperware	Blackstone Hydro Inc.	North Smithfield, RI	3 GWh	Dec 1980	Mar 2025	Water
MMWAC Resource Recovery Facility	Maine Waste to Energy	Auburn, ME	10 GWh	May 1992	Mar 2025	Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.2% Natural Gas : 1.9%
General Electric Aircraft Engines	General Electric Aircraft Engines	Lynn, MA	2 GWh	Dec 1947	Mar 2025	Solar
Central Power Plant	State of Rhode Island	Cranston, RI	19 GWh	Jul 1958	Mar 2025	Natural Gas
Gillette SBMC	The Gillette Company	Boston, MA	60 GWh	Jan 1971	Mar 2025	Natural Gas : 99.9%
Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, CT	460 GWh	Jun 1988	Mar 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Somerset Plant	Sappi Fine Paper North America-Somerset	Skowhegan, ME	534 GWh	Dec 1975	Mar 2025	Black Liquor : 46.9% Wood/Wood Waste Solids : 36.7% Tire-derived Fuels : 6.3% Natural Gas : 6.3% Residual Fuel Oil : 2.7% Sludge Waste : 1.0%
Pepperell Hydro Power Plant	Eagle Creek Renewable Energy, LLC	Pepperell, MA	4 GWh	Dec 1919	Mar 2025	Water
Milford Power Project	Milford Power Co LLC	Milford, CT	4 TWh	Jan 2004	Mar 2025	Natural Gas
Bridgeport Energy Project	Bridgeport Energy LLC	Bridgeport, CT	3 TWh	May 1998	Mar 2025	Natural Gas
William F Wyman Hybrid	FPL Energy Wyman LLC	Yarmouth, ME	50 GWh	Dec 1956	Mar 2025	Residual Fuel Oil : 99.2% Distillate Fuel Oil : 0.8%
Fore River Generating Station	Calpine Fore River Energy Center, LLC	North Weymouth, MA	3 TWh	Jul 2003	Mar 2025	Natural Gas : 95.4% Distillate Fuel Oil : 4.6%
New England Wind LLC	Avangrid Renewables LLC	Florida, MA	70 GWh	Nov 2012	Mar 2025	Wind
Kibby Wind Facility	Helix Maine Wind Development, LLC	Chain of Ponds, ME	269 GWh	Sep 2009	Mar 2025	Wind
Westbrook Energy Center Power Plant	Westbrook Energy Center	Westbrook, ME	3 TWh	Apr 2001	Mar 2025	Natural Gas
Dartmouth College Heating Plant	Dartmouth College	Hanover, NH	10 GWh	Dec 1969	Mar 2025	Residual Fuel Oil
Exelon West Medway II LLC	Constellation Power, Inc	Medway, MA	221 GWh	Feb 2019	Mar 2025	Natural Gas : 98.2% Kerosene : 1.8%
Georgia Mountain Community Wind Farm	Greenbacker Renewable Energy Corporation	Milton, VT	29 GWh	Nov 2012	Mar 2025	Wind
Kendall Square Station	Kendall Green Energy, LLC	Cambridge, MA	2 TWh	May 1949	Mar 2025	Natural Gas : 99.0% Distillate Fuel Oil : 1.0%
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	133 GWh	Mar 2005	Mar 2025	Natural Gas
Canal	Canal Generating LLC	Sandwich, MA	305 GWh	May 1968	Mar 2025	Natural Gas : 73.0% Residual Fuel Oil : 24.5% Distillate Fuel Oil : 2.5%
Eastern Maine Medical Center	Eastern Maine Medical Center	Bangor, ME	31 GWh	Sep 2006	Mar 2025	Natural Gas
Granite Reliable Power	NexteraEnergy	Dummer, NH	198 GWh	Jan 2012	Mar 2025	Wind
Passadumkeag Windpark LLC	Southern Power Co	Greenbush, ME	132 GWh	Jun 2016	Mar 2025	Wind
Dept of Corrections NCCI Wind	Dept of Corrections NCCI Wind	Gardner, MA	5 GWh	Oct 2013	Mar 2025	Wind
Cape Cod Air Force Station - 6 SWS	US Air Force	Sagamore, MA	4 GWh	Dec 2013	Mar 2025	Wind
WED Coventry 2	WED Coventry Two, LLC	Coventry, RI	8 GWh	Jul 2016	Mar 2025	Wind
Framingham State University Plant	Framingham State University	Framingham, MA	74 MWh	May 1974	Mar 2025	Solar : 67.6% Distillate Fuel Oil : 32.4%
Antares-GRE 314 East Lyme LLC	MN8 Energy LLC	East Lyme, CT	4 GWh	May 2014	Mar 2025	Solar
Johnston LFG Turbine Plant	Rhode Island LFG Genco	Johnston, RI	187 GWh	Apr 2013	Mar 2025	Landfill Gas
Seabrook	NextEra Energy Seabrook LLC	Seabrook, NH	10 TWh	Jul 1990	Mar 2025	Nuclear
Cottage Street Solar Facility	Western Massachusetts Electric Company	Springfield, MA	3 GWh	Apr 2014	Mar 2025	Solar
Algonquin Windsor Locks	Algonquin Windsor Locks LLC	Windsor Locks, CT	120 GWh	Dec 1989	Mar 2025	Natural Gas : 99.9%
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	20 GWh	Oct 2015	Mar 2025	Natural Gas : 88.4% Solar : 11.6%
Stafford Hill Solar Hybrid	Green Mountain Power Corp	Rutland, VT	946 MWh	Feb 2015	Mar 2025	Solar
Regional Waste Systems	Ecomaine	Portland, ME	82 GWh	May 1988	Mar 2025	Non-biogenic Municipal Solid Waste : 54.6% Biogenic Municipal Solid Waste : 44.7% Natural Gas : 0.8%
Otis Hydro	Eagle Creek Renewable Energy, LLC	Livermore Falls, ME	32 GWh	Dec 1984	Mar 2025	Water
Deer Island Treatment Plant	Massachusetts Wtr Rauth-Deer I	Winthrop, MA	35 GWh	Jul 1995	Mar 2025	Other Biomass Gas : 78.7% Distillate Fuel Oil : 12.5% Water : 4.8% Wind : 2.3% Solar : 1.8%
Searsburg Wind Turbine	Green Mountain Power Corp	Searsburg, VT	11 GWh	May 1997	Mar 2025	Wind
Wheelabrator Concord Facility	Wheelabrator Environmental Systems	Concord, NH	93 GWh	Mar 1989	Mar 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Covanta Bristol Energy	Covanta Bristol Inc	Bristol, CT	109 GWh	Nov 1987	Mar 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
SEMASS Resource Recovery	SEMASS Partnership	West Wareham, MA	569 GWh	Jun 1988	Mar 2025	Non-biogenic Municipal Solid Waste : 54.1% Biogenic Municipal Solid Waste : 44.3% Natural Gas : 1.5%
Wheelabrator Millbury Facility	Wheelabrator Environmental Systems	Millbury, MA	323 GWh	Aug 1987	Mar 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Rhode Island Hospital	Rhode Island Hospital	Providence, RI	9 GWh	Sep 1974	Mar 2025	Natural Gas : 89.5% Residual Fuel Oil : 10.5%
Wheelabrator North Andover	Wheelabrator Environmental Systems	North Andover, MA	239 GWh	Apr 1985	Mar 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Bucksport Generation LLC	Bucksport Generation LLC	Bucksport, ME	14 GWh	Jun 1965	Mar 2025	Natural Gas : 98.3% Distillate Fuel Oil : 1.7%
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	14 GWh	Jul 2015	Mar 2025	Natural Gas
Merrimack	Granite Shore Power	Bow, NH	317 GWh	Nov 1960	Mar 2025	Bituminous Coal : 99.6%
Schiller	Granite Shore Power	Portsmouth, NH	536 MWh	Sep 1952	Mar 2025	Jet Fuel
Granite Ridge	Granite Ridge Energy LLC	Londonderry, NH	3 TWh	Feb 2003	Mar 2025	Natural Gas
Lake Road Generating Plant	Lake Road Generating Co LP	Dayville, CT	6 TWh	Feb 2002	Mar 2025	Natural Gas
Manchester Street	Manchester Street, LLC.	Providence, RI	1 TWh	Aug 1995	Mar 2025	Natural Gas : 98.2% Distillate Fuel Oil : 1.8%
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	3 TWh	Sep 2002	Mar 2025	Natural Gas
Pfizer Groton Plant	Pfizer Inc	Groton, CT	80 GWh	Dec 1947	Mar 2025	Natural Gas : 94.7% Distillate Fuel Oil : 5.3%
Lempster Wind LLC	Avangrid Renewables LLC	Lempster, NH	65 GWh	Nov 2008	Mar 2025	Wind
Newington	Essential Power Operating Services, LLC	Newington, NH	2 TWh	Sep 2002	Mar 2025	Natural Gas : 95.2% Distillate Fuel Oil : 4.8%
Stony Brook	Massachusetts Mun Wholes Electric Co	Ludlow, MA	65 GWh	Oct 1981	Mar 2025	Distillate Fuel Oil : 74.1% Natural Gas : 25.9%
ANP Blackstone Energy Project	ANP Blackstone Energy Company LLC	Blackstone, MA	2 TWh	May 2001	Mar 2025	Natural Gas
Bingham Wind	Onward Energy	Bingham, ME	485 GWh	Nov 2016	Mar 2025	Wind
Sheffield Wind	Evergreen Wind, LLC	Sheffield, VT	74 GWh	Sep 2011	Mar 2025	Wind
Spring Hill Road	AES Distributed Energy	Barre, MA	376 MWh	Nov 2015	Mar 2025	Solar
Kleen Energy Systems Project	Kleen Energy Systems, LLC	Middletown, CT	3 TWh	Jun 2011	Mar 2025	Natural Gas : 99.2% Distillate Fuel Oil : 0.8%
ANP Bellingham Energy Project	Bellingham Power Generation LLC	Bellingham, MA	3 TWh	Oct 2002	Mar 2025	Natural Gas
Berkshire Wind Power Project	Massachusetts Mun Wholes Electric Co	Lanesboro, MA	30 GWh	Apr 2011	Mar 2025	Wind
Block Island Wind Farm	Deepwater Wind Block Island LLC	NA, RI	88 GWh	Nov 2016	Mar 2025	Wind
Berlin 5	Green Mountain Power Corp	Berlin, VT	927 MWh	May 1972	Mar 2025	Kerosene
Antrim Wind	Antrim Wind Energy LLC	Antrim, NH	75 GWh	Nov 2019	Mar 2025	Wind
Essex Junction 19	Green Mountain Power Corp	Essex Junction, VT	38 GWh	Dec 1916	Mar 2025	Water : 99.6%
Water Treatment 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	303 MWh	Sep 2010	Mar 2025	Distillate Fuel Oil

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	729.4 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.2 TWh	85
#13	Duke Energy Carolinas	111.6 TWh	556
#17	Duke Energy Progress East	65.4 TWh	554
#52	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.8 TWh	20
#12	New York Independent System Operator	130.8 TWh	1,100
#1	PJM Interconnection, LLC	860.0 TWh	2,305
#29	South Carolina Public Service Authority	19.3 TWh	33
#60	Southeastern Power Administration	1.4 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	189.8 TWh	1,943
#8	Tennessee Valley Authority	159.0 TWh	170
#10	Florida Power & Light Co.	148.4 TWh	159
#12	New York Independent System Operator	130.8 TWh	1,100
#13	Duke Energy Carolinas	111.6 TWh	556
#15	ISO New England	103.5 TWh	1,487
#16	Bonneville Power Administration	82.6 TWh	158
#17	Duke Energy Progress East	65.4 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	58.6 TWh	45
#19	PacifiCorp East	57.2 TWh	204