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	Dec 2024
Annual Generation	104.1 TWh
Power Plants	1,487
Utilities	782
Ranked #15 out of 65 in terms of net annual generation
Ranked #12 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 57.2% Nuclear \| 25.2% Water \| 7.1% Other Fuel \| 4.5% Wind \| 3.3% Solar \| 1.3% Coal \| 0.2%

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

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Rocky River (CT)	FirstLight Power Resources Services LLC	New Milford, CT	10 GWh	Dec 1927	Oct 2024	Water
UCONN Cogen Facility	University of Connecticut	Storrs, CT	123 GWh	Feb 2006	Oct 2024	Natural Gas : 99.7%
Pratt & Whitney	United Technologies	East Hartford, CT	109 GWh	Dec 1991	Oct 2024	Natural Gas : 99.8%
Covanta Haverhill	Ogden Projects Inc-Haverhill	Haverhill, MA	345 GWh	Apr 1989	Oct 2024	Non-biogenic Municipal Solid Waste : 54.9% Biogenic Municipal Solid Waste : 44.9%
Frito Lay Incorporated	Frito Lay Incorporated Dayville	Dayville, CT	24 GWh	Feb 2009	Oct 2024	Natural Gas
Cellu Tissue	Dunn Paper East Hartford, LLC	East Hartford, CT	12 GWh	Apr 2009	Oct 2024	Natural Gas
Pittsfield Generating LP	Pittsfield Generating Company, LP	Pittsfield, MA	30 GWh	Jun 1990	Oct 2024	Natural Gas : 98.5% Distillate Fuel Oil : 1.5%
Oakfield Wind Project	Onward Energy	City of Oakfield, ME	323 GWh	Sep 2015	Oct 2024	Wind
Milford Power Project	Milford Power Co LLC	Milford, CT	4 TWh	Jan 2004	Oct 2024	Natural Gas
Algonquin Windsor Locks	Algonquin Windsor Locks LLC	Windsor Locks, CT	129 GWh	Dec 1989	Oct 2024	Natural Gas : 99.9%
WED Coventry 2	WED Coventry Two, LLC	Coventry, RI	6 GWh	Jul 2016	Oct 2024	Wind
Rainbow (CT)	Farmington River Power Company	Windsor, CT	32 GWh	Nov 1925	Oct 2024	Water
Dept of Corrections NCCI Wind	Dept of Corrections NCCI Wind	Gardner, MA	5 GWh	Oct 2013	Oct 2024	Wind
Kingdom Community Wind	Green Mountain Power Corp	Lowell, VT	157 GWh	Oct 2012	Oct 2024	Wind
Hampton Facility	Foss Manufacturing Company LLC	Hampton, NH	26 GWh	Sep 1978	Oct 2024	Natural Gas
Erving Paper Mills	Erving Paper Mills Inc	Erving, MA	43 GWh	Nov 2013	Oct 2024	Natural Gas : 98.1% Distillate Fuel Oil : 1.9%
Bridgeport Energy Project	Bridgeport Energy LLC	Bridgeport, CT	3 TWh	May 1998	Oct 2024	Natural Gas
Millstone	Dominion Energy Nuclear Conn Inc	Waterford, CT	16 TWh	Nov 1975	Oct 2024	Nuclear
Bridgeport Station	Generation Bridge II Connecticut, LLC	Bridgeport, CT	3 TWh	Jul 1961	Oct 2024	Natural Gas
Fort Hill 1, 2, 3 & 4	Connecticut Mun Elec Engy Coop	Uncasville, CT	717 MWh	Jul 2010	Oct 2024	Distillate Fuel Oil
CPV Towantic Energy Center	CPV Towantic, LLC	Oxford, CT	5 TWh	Apr 2018	Oct 2024	Natural Gas
Stafford Hill Solar Hybrid	Green Mountain Power Corp	Rutland, VT	965 MWh	Feb 2015	Oct 2024	Solar
Southbridge Solar	AES Distributed Energy	Southbridge, MA	2 GWh	Feb 2016	Oct 2024	Solar
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	133 GWh	Mar 2005	Oct 2024	Natural Gas
Eastern Maine Medical Center	Eastern Maine Medical Center	Bangor, ME	31 GWh	Sep 2006	Oct 2024	Natural Gas
Block Island Wind Farm	Deepwater Wind Block Island LLC	NA, RI	95 GWh	Nov 2016	Oct 2024	Wind
Hancock Wind Plant	Onward Energy	T22 MD, ME	112 GWh	Nov 2016	Oct 2024	Wind
Antares-GRE 314 East Lyme LLC	MN8 Energy LLC	East Lyme, CT	4 GWh	May 2014	Oct 2024	Solar
WED Coventry 6	Greenbacker Renewable Energy Corporation	Coventry, RI	6 GWh	Jul 2016	Oct 2024	Wind
Middlebury College	Middlebury College Biomass	Middlebury, VT	2 GWh	Dec 1979	Oct 2024	Wood/Wood Waste Solids : 75.5% Natural Gas : 24.5%
Blackstone/Tupperware	Blackstone Hydro Inc.	North Smithfield, RI	4 GWh	Dec 1980	Oct 2024	Water
MMWAC Resource Recovery Facility	Maine Waste to Energy	Auburn, ME	10 GWh	May 1992	Oct 2024	Non-biogenic Municipal Solid Waste : 54.1% Biogenic Municipal Solid Waste : 44.3% Natural Gas : 1.5%
General Electric Aircraft Engines	General Electric Aircraft Engines	Lynn, MA	2 GWh	Dec 1947	Oct 2024	Solar
Central Power Plant	State of Rhode Island	Cranston, RI	19 GWh	Jul 1958	Oct 2024	Natural Gas
Rhode Island Hospital	Rhode Island Hospital	Providence, RI	11 GWh	Sep 1974	Oct 2024	Natural Gas : 90.8% Residual Fuel Oil : 9.2%
Wheelabrator Saugus	Wheelabrator Environmental Systems	Saugus, MA	229 GWh	Jul 1985	Oct 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Somerset Plant	Sappi Fine Paper North America-Somerset	Skowhegan, ME	510 GWh	Dec 1975	Oct 2024	Black Liquor : 46.3% Wood/Wood Waste Solids : 37.1% Natural Gas : 6.8% Tire-derived Fuels : 6.4% Residual Fuel Oil : 2.3% Sludge Waste : 1.0%
Covanta Southeastern Connecticut Company	Covanta Southeastern Connecticut Company	Preston, CT	114 GWh	Nov 1991	Oct 2024	Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.2% Distillate Fuel Oil : 1.8%
Granite Ridge	Granite Ridge Energy LLC	Londonderry, NH	3 TWh	Feb 2003	Oct 2024	Natural Gas
Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, CT	99 GWh	Sep 1995	Oct 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Fore River Generating Station	Calpine Fore River Energy Center, LLC	North Weymouth, MA	3 TWh	Jul 2003	Oct 2024	Natural Gas : 99.8%
William F Wyman Hybrid	FPL Energy Wyman LLC	Yarmouth, ME	23 GWh	Dec 1956	Oct 2024	Residual Fuel Oil : 98.8% Distillate Fuel Oil : 1.2%
Bingham Wind	Onward Energy	Bingham, ME	445 GWh	Nov 2016	Oct 2024	Wind
Sheffield Wind	Evergreen Wind, LLC	Sheffield, VT	67 GWh	Sep 2011	Oct 2024	Wind
Westbrook Energy Center Power Plant	Westbrook Energy Center	Westbrook, ME	3 TWh	Apr 2001	Oct 2024	Natural Gas
Dartmouth College Heating Plant	Dartmouth College	Hanover, NH	10 GWh	Dec 1969	Oct 2024	Residual Fuel Oil
West Greenwich Solar	Consolidated Edison Development Inc.	West Greenwich, RI	3 GWh	Apr 2013	Oct 2024	Solar
Antrim Wind	Antrim Wind Energy LLC	Antrim, NH	67 GWh	Nov 2019	Oct 2024	Wind
UNH 7.9 MW Plant	Emcor Energy Services	Durham, NH	49 GWh	Aug 2006	Oct 2024	Landfill Gas : 71.5% Natural Gas : 26.9% Distillate Fuel Oil : 1.6%
Kendall Square Station	Kendall Green Energy, LLC	Cambridge, MA	2 TWh	May 1949	Oct 2024	Natural Gas : 99.7%
Groton Wind LLC	Avangrid Renewables LLC	Groton, NH	98 GWh	Nov 2012	Oct 2024	Wind
Canal	Canal Generating LLC	Sandwich, MA	206 GWh	May 1968	Oct 2024	Natural Gas : 80.4% Residual Fuel Oil : 18.4% Distillate Fuel Oil : 1.2%
Granite Reliable Power	NexteraEnergy	Dummer, NH	184 GWh	Jan 2012	Oct 2024	Wind
Jericho Power	Jericho Power LLC	Berlin, NH	20 GWh	Dec 2015	Oct 2024	Wind
Fusion Solar Center LLC	Fusion Solar Centre, L.L.C	Baltic, CT	39 GWh	Feb 2018	Oct 2024	Solar
Cottage Street Solar Facility	Western Massachusetts Electric Company	Springfield, MA	3 GWh	Apr 2014	Oct 2024	Solar
Johnston LFG Turbine Plant	Rhode Island LFG Genco	Johnston, RI	230 GWh	Apr 2013	Oct 2024	Landfill Gas
NBC Field's Point Wind Farm	Narragansett Bay Commission	Providence, RI	5 GWh	Sep 2012	Oct 2024	Wind
Backus Microgrid Project	Connecticut Mun Elec Engy Coop	Norwich, CT	1 GWh	Jul 2014	Oct 2024	Distillate Fuel Oil
Passadumkeag Windpark LLC	Southern Power Co	Greenbush, ME	123 GWh	Jun 2016	Oct 2024	Wind
Georgia Mountain Community Wind Farm	Greenbacker Renewable Energy Corporation	Milton, VT	26 GWh	Nov 2012	Oct 2024	Wind
Seabrook	NextEra Energy Seabrook LLC	Seabrook, NH	10 TWh	Jul 1990	Oct 2024	Nuclear
Rumford Cogeneration	ND Paper, Inc.	Rumford, ME	414 GWh	Dec 1989	Oct 2024	Black Liquor : 53.4% Tire-derived Fuels : 23.2% Wood/Wood Waste Solids : 13.3% Bituminous Coal : 7.3% Residual Fuel Oil : 1.9% Sludge Waste : 0.9%
Newington	Granite Shore Power	Newington, NH	50 GWh	May 1974	Oct 2024	Natural Gas : 93.0% Residual Fuel Oil : 6.8%
Deer Island Treatment Plant	Massachusetts Wtr Rauth-Deer I	Winthrop, MA	37 GWh	Jul 1995	Oct 2024	Other Biomass Gas : 72.1% Distillate Fuel Oil : 15.4% Water : 9.2% Solar : 1.7% Wind : 1.6%
Regional Waste Systems	Ecomaine	Portland, ME	82 GWh	May 1988	Oct 2024	Non-biogenic Municipal Solid Waste : 54.5% Biogenic Municipal Solid Waste : 44.6% Natural Gas : 1.0%
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	20 GWh	Oct 2015	Oct 2024	Natural Gas : 91.9% Solar : 8.1%
Pepperell Hydro Power Plant	Eagle Creek Renewable Energy, LLC	Pepperell, MA	7 GWh	Dec 1919	Oct 2024	Water
Searsburg Wind Turbine	Green Mountain Power Corp	Searsburg, VT	9 GWh	May 1997	Oct 2024	Wind
Wheelabrator Concord Facility	Wheelabrator Environmental Systems	Concord, NH	92 GWh	Mar 1989	Oct 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Covanta Bristol Energy	Covanta Bristol Inc	Bristol, CT	110 GWh	Nov 1987	Oct 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
SEMASS Resource Recovery	SEMASS Partnership	West Wareham, MA	566 GWh	Jun 1988	Oct 2024	Non-biogenic Municipal Solid Waste : 54.2% Biogenic Municipal Solid Waste : 44.3% Natural Gas : 1.5%
Wheelabrator Millbury Facility	Wheelabrator Environmental Systems	Millbury, MA	321 GWh	Aug 1987	Oct 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Gillette SBMC	The Gillette Company	Boston, MA	61 GWh	Jan 1971	Oct 2024	Natural Gas : 99.9%
Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, CT	453 GWh	Jun 1988	Oct 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator North Andover	Wheelabrator Environmental Systems	North Andover, MA	241 GWh	Apr 1985	Oct 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Bucksport Generation LLC	Bucksport Generation LLC	Bucksport, ME	18 GWh	Jun 1965	Oct 2024	Natural Gas : 98.7% Distillate Fuel Oil : 1.3%
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	19 GWh	Jul 2015	Oct 2024	Natural Gas
Merrimack	Granite Shore Power	Bow, NH	132 GWh	Nov 1960	Oct 2024	Bituminous Coal : 99.0% Jet Fuel : 0.9%
Schiller	Granite Shore Power	Portsmouth, NH	594 MWh	Sep 1952	Oct 2024	Jet Fuel
Lake Road Generating Plant	Lake Road Generating Co LP	Dayville, CT	6 TWh	Feb 2002	Oct 2024	Natural Gas
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	4 TWh	Sep 2002	Oct 2024	Natural Gas
Manchester Street	Manchester Street, LLC.	Providence, RI	1 TWh	Aug 1995	Oct 2024	Natural Gas : 99.7%
Ascutney	Green Mountain Power Corp	Weatherfield, VT	200 MWh	Jul 1961	Oct 2024	Distillate Fuel Oil
Pfizer Groton Plant	Pfizer Inc	Groton, CT	71 GWh	Dec 1947	Oct 2024	Natural Gas : 98.3% Distillate Fuel Oil : 1.7%
Lempster Wind LLC	Avangrid Renewables LLC	Lempster, NH	61 GWh	Nov 2008	Oct 2024	Wind
Newington	Essential Power Operating Services, LLC	Newington, NH	1 TWh	Sep 2002	Oct 2024	Natural Gas : 99.9%
ANP Blackstone Energy Project	ANP Blackstone Energy Company LLC	Blackstone, MA	2 TWh	May 2001	Oct 2024	Natural Gas
Stony Brook	Massachusetts Mun Wholes Electric Co	Ludlow, MA	41 GWh	Oct 1981	Oct 2024	Distillate Fuel Oil : 59.5% Natural Gas : 40.5%
Kibby Wind Facility	Helix Maine Wind Development, LLC	Chain of Ponds, ME	257 GWh	Sep 2009	Oct 2024	Wind
New England Wind LLC	Avangrid Renewables LLC	Florida, MA	61 GWh	Nov 2012	Oct 2024	Wind
Kleen Energy Systems Project	Kleen Energy Systems, LLC	Middletown, CT	3 TWh	Jun 2011	Oct 2024	Natural Gas : 99.4% Distillate Fuel Oil : 0.6%
Framingham State University Plant	Framingham State University	Framingham, MA	83 MWh	May 1974	Oct 2024	Solar : 72.3% Distillate Fuel Oil : 27.7%
ANP Bellingham Energy Project	Bellingham Power Generation LLC	Bellingham, MA	3 TWh	Oct 2002	Oct 2024	Natural Gas
Berkshire Wind Power Project	Massachusetts Mun Wholes Electric Co	Lanesboro, MA	29 GWh	Apr 2011	Oct 2024	Wind
Mt Wachusett Community College	Mt Wachusett Community College	Gardner, MA	4 GWh	Feb 2011	Oct 2024	Wind
Exelon West Medway II LLC	Constellation Power, Inc	Medway, MA	200 GWh	Feb 2019	Oct 2024	Natural Gas : 99.4% Kerosene : 0.6%
Berlin 5	Green Mountain Power Corp	Berlin, VT	1 GWh	May 1972	Oct 2024	Kerosene
Water Treatment 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	410 MWh	Sep 2010	Oct 2024	Distillate Fuel Oil
Essex Junction 19	Green Mountain Power Corp	Essex Junction, VT	46 GWh	Dec 1916	Oct 2024	Water : 99.5%

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	898.6 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.0 TWh	85
#13	Duke Energy Carolinas	111.4 TWh	556
#17	Duke Energy Progress East	63.7 TWh	554
#51	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.2 TWh	20
#12	New York Independent System Operator	130.5 TWh	1,100
#1	PJM Interconnection, LLC	846.2 TWh	2,305
#31	South Carolina Public Service Authority	18.3 TWh	33
#60	Southeastern Power Administration	1.6 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	190.7 TWh	1,943
#9	Tennessee Valley Authority	158.2 TWh	170
#10	Florida Power & Light Co.	147.3 TWh	159
#12	New York Independent System Operator	130.5 TWh	1,100
#13	Duke Energy Carolinas	111.4 TWh	556
#15	ISO New England	104.1 TWh	1,487
#16	Bonneville Power Administration	80.4 TWh	158
#17	Duke Energy Progress East	63.7 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	58.5 TWh	45
#19	PacifiCorp East	53.7 TWh	204