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	Nov 2024
Annual Generation	102.8 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 \| 57.6% Nuclear \| 25% Water \| 7.7% Other Fuel \| 4.6% Wind \| 3.3% Solar \| 1.2% Coal \| 0.1%

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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
Mechanic Falls	KEI (Maine) Power Management (IV) LLC	Mechanic Falls, ME	3 GWh	Mar 1986	Dec 2023	Water
Goodwin Hydroelectric	Metropolitan Dist of Hartford	W. Hartland, CT	13 GWh	Mar 1986	Dec 2023	Water
Salmon Falls	Green Mountain Power Corp	South Berwick, ME	5 GWh	Jun 1986	Dec 2023	Water
Pittsfield Hydro	KEI (Maine) Power Management (II) LLC	Burnham, ME	6 GWh	Jun 1986	Dec 2023	Water
Rollinsford	Green Mountain Power Corp	Rollinsford, NH	4 GWh	Sep 1986	Dec 2023	Water
Errol Hydroelectric Project	Errol Hydroelectric Co LLC	Errol, NH	16 GWh	Oct 1986	Dec 2023	Water
Penacook Upper Falls Hydro	Briar-Hydro Associates	Penacook, NH	17 GWh	Nov 1986	Dec 2023	Water
Pontook Hydro Facility	Pontook Operating LP	Dummer, NH	58 GWh	Nov 1986	Dec 2023	Water
Pumpkin Hill	KEI (Maine) Power Management (II) LLC	Lowell, ME	5 GWh	Feb 1987	Dec 2023	Water
Upper Barker	KEI (Maine) Power Management (III) LLC	Auburn, ME	7 GWh	Apr 1987	Dec 2023	Water
Bridgewater Power LP	Bridgewater Power Co LP	Bridgewater, NH	109 GWh	Jul 1987	Dec 2023	Wood/Wood Waste Solids : 99.8%
Wheelabrator Millbury Facility	Wheelabrator Environmental Systems	Millbury, MA	320 GWh	Aug 1987	Aug 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Penobscot Energy Recovery	ESOCO Orrington LLC	Orrington, ME	31 GWh	Oct 1987	May 2023	Non-biogenic Municipal Solid Waste : 54.1% Biogenic Municipal Solid Waste : 44.3% Distillate Fuel Oil : 1.6%
Pejepscot Hydroelectric Project	Topsham Hydro Partners	Topsham, ME	71 GWh	Oct 1987	Dec 2023	Water
Benton Falls Associates	Essex Hydro Associates LLC	Benton, ME	17 GWh	Nov 1987	Dec 2023	Water
Indeck West Enfield Energy Center	Stored Solar J&WE	West Enfield, ME	13 GWh	Nov 1987	Dec 2023	Wood/Wood Waste Solids : 99.7%
NE Renewable Springfield, LLC	NE Renewable Springfield, LLC	Springfield, NH	32 GWh	Nov 1987	Dec 2023	Wood/Wood Waste Solids
Rolfe Canal Hydro	Briar-Hydro Associates	Penacook, NH	28 GWh	Nov 1987	Dec 2023	Water
Covanta Bristol Energy	Covanta Bristol Inc	Bristol, CT	109 GWh	Nov 1987	Aug 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
NE Renewable Whitefield, LLC	NE Renewable Whitefield, LLC	Whitefield, NH	13 GWh	Feb 1988	Dec 2023	Wood/Wood Waste Solids
West Enfield Hydro	Brookfield Black Bear Hydro, LLC	West Enfield, ME	100 GWh	Mar 1988	Dec 2023	Water
Regional Waste Systems	Ecomaine	Portland, ME	81 GWh	May 1988	Aug 2024	Non-biogenic Municipal Solid Waste : 54.4% Biogenic Municipal Solid Waste : 44.5% Natural Gas : 1.0%
Aziscohos Hydroelectric Project	Brookfield White Pine Hydro LLC	Wilson Mills, ME	39 GWh	May 1988	Dec 2023	Water
Sheldon Springs Hydroelectric	Central Rivers Power US, LLC	Sheldon Springs, VT	75 GWh	Jun 1988	Dec 2023	Water
SEMASS Resource Recovery	SEMASS Partnership	West Wareham, MA	568 GWh	Jun 1988	Aug 2024	Non-biogenic Municipal Solid Waste : 54.2% Biogenic Municipal Solid Waste : 44.4% Natural Gas : 1.3%
Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, CT	442 GWh	Jun 1988	Aug 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Hartford Hospital Cogeneration	Cartier Energy, LLC	Hartford, CT	44 GWh	Jun 1988	Dec 2023	Natural Gas : 99.8%
Huntington Falls	Green Mountain Power Corp	Weybridge, VT	33 GWh	Sep 1988	Dec 2023	Water
Mascoma Hydro	Green Mountain Power Corp	W. Lebanon, NH	4 GWh	Nov 1988	Dec 2023	Water
Derby Hydro	McCallum Enterprises I LP	Shelton, CT	9 GWh	Dec 1988	Dec 2023	Water
Moretown Generating Station	Moretown Hydroelectric LLC	Moretown, VT	3 GWh	Dec 1988	Dec 2023	Water
Hydro Kennebec Project	Hydro Kennebec LLC	Winslow, ME	70 GWh	Dec 1988	Dec 2023	Water
Worumbo Hydro Station	Eagle Creek Renewable Energy, LLC	Lisbon Falls, ME	105 GWh	Jan 1989	Dec 2023	Water
Wheelabrator Concord Facility	Wheelabrator Environmental Systems	Concord, NH	94 GWh	Mar 1989	Aug 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Covanta Haverhill	Ogden Projects Inc-Haverhill	Haverhill, MA	342 GWh	Apr 1989	Aug 2024	Non-biogenic Municipal Solid Waste : 54.9% Biogenic Municipal Solid Waste : 44.9%
Deweys Mill	Green Mountain Power Corp	White River Jct., VT	2 GWh	May 1989	Dec 2023	Water
Brassua Hydroelectric Project	Brassua Hydroelectric LP	Rockwood, ME	20 GWh	Aug 1989	Dec 2023	Water
ReEnergy Stratton LLC	ReEnergy Stratton LLC	Stratton, ME	177 GWh	Oct 1989	Dec 2023	Wood/Wood Waste Solids
Hillsborough Hosiery	Silverstreet Hydro	Hillsboro, NH	2 GWh	Nov 1989	Dec 2023	Water
Charles E Monty	Brookfield White Pine Hydro LLC	Lewiston, ME	177 GWh	Dec 1989	Dec 2023	Water
Rumford Cogeneration	ND Paper, Inc.	Rumford, ME	391 GWh	Dec 1989	Aug 2024	Black Liquor : 51.2% Tire-derived Fuels : 23.1% Wood/Wood Waste Solids : 13.6% Bituminous Coal : 9.0% Residual Fuel Oil : 2.4% Sludge Waste : 0.8%
Algonquin Windsor Locks	Algonquin Windsor Locks LLC	Windsor Locks, CT	130 GWh	Dec 1989	Aug 2024	Natural Gas : 99.9%
Quinebaug Lower Project	Quinebaug Associates LLC	Brooklyn, CT	10 GWh	Mar 1990	Dec 2023	Water
Pittsfield Generating LP	Pittsfield Generating Company, LP	Pittsfield, MA	34 GWh	Jun 1990	Aug 2024	Natural Gas : 99.3% Distillate Fuel Oil : 0.7%
Seabrook	NextEra Energy Seabrook LLC	Seabrook, NH	11 TWh	Jul 1990	Aug 2024	Nuclear
Dodge Falls Associates	Dodge Falls Associates LP	Bath, NH	32 GWh	Nov 1990	Dec 2023	Water
Ocean State Power	Ocean State Power Co	Harrisville, RI	1 TWh	Nov 1990	Dec 2023	Natural Gas : 99.6%
Bellingham Cogeneration Facility	Northeast Energy Associates LP	Bellingham, MA	102 GWh	Aug 1991	Nov 2023	Natural Gas : 88.2% Distillate Fuel Oil : 11.8%
Ocean State Power II	Ocean State Power II	Harrisville, RI	1 TWh	Sep 1991	Dec 2023	Natural Gas : 99.7%
Covanta Southeastern Connecticut Company	Covanta Southeastern Connecticut Company	Preston, CT	117 GWh	Nov 1991	Aug 2024	Non-biogenic Municipal Solid Waste : 54.0% Biogenic Municipal Solid Waste : 44.2% Distillate Fuel Oil : 1.9%
Pratt & Whitney	United Technologies	East Hartford, CT	129 GWh	Dec 1991	Aug 2024	Natural Gas : 99.8%
Turnkey Landfill Gas Recovery	WM Renewable Energy LLC	Rochester, NH	45 GWh	Jan 1992	Dec 2023	Landfill Gas
Dartmouth Power Associates LP	Morris Energy Operations Company, LLC	Dartmouth, MA	35 GWh	Feb 1992	Dec 2023	Natural Gas : 99.0% Distillate Fuel Oil : 1.0%
Norwalk Hospital Plant	Norwalk Hospital	Norwalk, CT	4 GWh	Apr 1992	Dec 2022	Natural Gas
MMWAC Resource Recovery Facility	Maine Waste to Energy	Auburn, ME	11 GWh	May 1992	Aug 2024	Non-biogenic Municipal Solid Waste : 54.3% Biogenic Municipal Solid Waste : 44.4% Natural Gas : 1.2%
ReEnergy Livermore Falls	ReEnergy Livermore Falls	Livermore Falls, ME	223 GWh	Jul 1992	Dec 2023	Wood/Wood Waste Solids
NE Renewable Fitchburg, LLC	NE Renewable Fitchburg, LLC	Westminster, MA	36 GWh	Jul 1992	Dec 2023	Wood/Wood Waste Solids : 97.6% Natural Gas : 2.4%
Ryegate Associates, LLC	Ryegate Associates, LLC	East Ryegate, VT	161 GWh	Aug 1992	Dec 2023	Wood/Wood Waste Solids
Milford Power LP	Milford Power LLC	Milford, MA	210 GWh	Feb 1993	Dec 2023	Natural Gas
Chace Mill Winooski One	City of Burlington Electric - (VT)	Winooski, VT	36 GWh	Mar 1993	Dec 2023	Water
Masspower	Masspower	Indian Orchard, MA	609 GWh	Jun 1993	Dec 2023	Natural Gas
CCSU Co-Gen-STBY Gen	Central Connecticut State University	New Britain, CT	88 MWh	Sep 1993	Dec 2023	Natural Gas
Lower Village Water Power Project	Sugar River Power LLC	Claremont, NH	6 GWh	Apr 1995	Dec 2023	Water
Mass Inst Tech Cntrl Utilities/Cogen Plt	Massachusetts Inst of Tech	Cambridge, MA	205 GWh	May 1995	Dec 2023	Natural Gas
Deer Island Treatment Plant	Massachusetts Wtr Rauth-Deer I	Winthrop, MA	38 GWh	Jul 1995	Aug 2024	Other Biomass Gas : 70.5% Distillate Fuel Oil : 16.1% Water : 10.2% Solar : 1.6% Wind : 1.6%
Manchester Street	Manchester Street, LLC.	Providence, RI	1 TWh	Aug 1995	Aug 2024	Natural Gas : 99.7%
Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, CT	99 GWh	Sep 1995	Aug 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Nashua Plant	EPP Renewable Energy	Nashua, NH	14 GWh	Mar 1996	Dec 2023	Landfill Gas
IXYS - Beverly	IXYS Integrated Circuits Division, LLC	Beverly, MA	23 MWh	Dec 1996	Dec 2023	Distillate Fuel Oil : 58.5% Natural Gas : 41.5%
Searsburg Wind Turbine	Green Mountain Power Corp	Searsburg, VT	9 GWh	May 1997	Aug 2024	Wind
MM Taunton Energy	MM Taunton Energy LLC	Taunton, MA	8 GWh	Aug 1997	Dec 2023	Landfill Gas
Bridgeport Energy Project	Bridgeport Energy LLC	Bridgeport, CT	3 TWh	May 1998	Aug 2024	Natural Gas
Dighton Power Plant	Dighton Power, LLC	Dighton, MA	358 GWh	Apr 1999	Dec 2023	Natural Gas
Berkshire Power	Berkshire Power Co LLC	Agawam, MA	70 GWh	Aug 1999	Dec 2023	Natural Gas
Androscoggin Energy Center	JGT2 Energy LLC	Jay, ME	82 GWh	Sep 1999	Dec 2023	Natural Gas : 96.1% Distillate Fuel Oil : 3.9%
Tiverton Power Plant	Tiverton Power LLC	Tiverton, RI	2 TWh	Feb 2000	Dec 2023	Natural Gas
Maine Independence Station	Casco Bay Energy Co LLC	Veazie, ME	937 GWh	Apr 2000	Dec 2023	Natural Gas
Rumford Power LLC	Rumford Power	Rumford, ME	403 GWh	Jun 2000	Dec 2023	Natural Gas
GRS Fall River	Gas Recovery Systems Inc	Fall River, MA	121 MWh	Jun 2000	Dec 2022	Landfill Gas
Millennium Power	Millennium Power Company, LLC	Charlton, MA	809 GWh	Mar 2001	Aug 2024	Natural Gas
Westbrook Energy Center Power Plant	Westbrook Energy Center	Westbrook, ME	3 TWh	Apr 2001	Aug 2024	Natural Gas
ANP Blackstone Energy Project	ANP Blackstone Energy Company LLC	Blackstone, MA	2 TWh	May 2001	Aug 2024	Natural Gas
Wallingford Energy	Wallingford Energy LLC	Wallingford, CT	161 GWh	Jul 2001	Dec 2023	Natural Gas
Granby LFG	Industrial Power Services Corp.	Granby, MA	3 GWh	Aug 2001	Dec 2023	Landfill Gas
Lake Road Generating Plant	Lake Road Generating Co LP	Dayville, CT	6 TWh	Feb 2002	Aug 2024	Natural Gas
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	4 TWh	Sep 2002	Aug 2024	Natural Gas
Newington	Essential Power Operating Services, LLC	Newington, NH	861 GWh	Sep 2002	Aug 2024	Natural Gas : 99.9%
ANP Bellingham Energy Project	Bellingham Power Generation LLC	Bellingham, MA	3 TWh	Oct 2002	Aug 2024	Natural Gas
Bradley Energy Center	Ameresco Select Inc	Windsor Locks, CT	13 GWh	Oct 2002	Dec 2023	Natural Gas
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	157 GWh	Dec 2002	Dec 2023	Natural Gas
Granite Ridge	Granite Ridge Energy LLC	Londonderry, NH	3 TWh	Feb 2003	Aug 2024	Natural Gas
Williams College - Campus CHP	President & Trustees of Williams College	Williamstown, MA	2 GWh	Feb 2003	Dec 2023	Natural Gas : 93.7% Distillate Fuel Oil : 6.3%
Waterside Power, LLC	Waterside Power, LLC	Stamford, CT	2 GWh	May 2003	Dec 2023	Distillate Fuel Oil
Fore River Generating Station	Calpine Fore River Energy Center, LLC	North Weymouth, MA	3 TWh	Jul 2003	Aug 2024	Natural Gas : 99.8%
Milford Power Project	Milford Power Co LLC	Milford, CT	4 TWh	Jan 2004	Aug 2024	Natural Gas
Ameresco Chicopee Energy	AMERESCO Chicopee Energy LLC	Chicopee, MA	14 GWh	Jan 2004	Dec 2023	Landfill Gas
Norden 1-3	Third Taxing District of Norwalk	Norwalk, CT	42 MWh	May 2004	Dec 2022	Distillate Fuel Oil
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	134 GWh	Mar 2005	Aug 2024	Natural Gas
Coventry Clean Energy Corporation	Washington Electric Coop - (VT)	Coventry, VT	52 GWh	Jun 2005	Dec 2023	Landfill Gas
Ridgewood Providence Power	Rhode Island LFG Genco	Johnston, RI	10 GWh	Jul 2005	Dec 2023	Landfill Gas

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	894.0 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.0 TWh	85
#13	Duke Energy Carolinas	110.9 TWh	556
#17	Duke Energy Progress East	63.3 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	130.0 TWh	1,100
#1	PJM Interconnection, LLC	843.8 TWh	2,305
#31	South Carolina Public Service Authority	17.9 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	191.5 TWh	1,943
#9	Tennessee Valley Authority	157.5 TWh	170
#10	Florida Power & Light Co.	147.7 TWh	159
#12	New York Independent System Operator	130.0 TWh	1,100
#13	Duke Energy Carolinas	110.9 TWh	556
#15	ISO New England	102.8 TWh	1,487
#16	Bonneville Power Administration	80.0 TWh	158
#17	Duke Energy Progress East	63.3 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	59.0 TWh	45
#19	PacifiCorp East	52.6 TWh	204