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
Dartmouth College Heating Plant	Dartmouth College	Hanover, NH	10 GWh	Dec 1969	Jul 2026	Residual Fuel Oil
Pratt & Whitney	United Technologies	East Hartford, CT	96 GWh	Dec 1991	Jul 2026	Natural Gas
Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, CT	101 GWh	Sep 1995	Jul 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Bridgeport Energy Project	Bridgeport Energy LLC	Bridgeport, CT	3 TWh	May 1998	Jul 2026	Natural Gas
Millennium Power	Millennium Power Company, LLC	Charlton, MA	880 GWh	Mar 2001	Jul 2026	Natural Gas
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	3 TWh	Sep 2002	Jul 2026	Natural Gas
Milford Power Project	Milford Power Co LLC	Milford, CT	3 TWh	Jan 2004	Jul 2026	Natural Gas
Lake Road Generating Plant	Lake Road Generating Co LP	Dayville, CT	6 TWh	Feb 2002	Jul 2026	Natural Gas
Granite Ridge	Granite Ridge Energy LLC	Londonderry, NH	4 TWh	Feb 2003	Jul 2026	Natural Gas
ANP Bellingham Energy Project	Bellingham Power Generation LLC	Bellingham, MA	3 TWh	Oct 2002	Jul 2026	Natural Gas
ANP Blackstone Energy Project	ANP Blackstone Energy Company LLC	Blackstone, MA	3 TWh	May 2001	Jul 2026	Natural Gas
Westbrook Energy Center Power Plant	Westbrook Energy Center	Westbrook, ME	3 TWh	Apr 2001	Jul 2026	Natural Gas
Fore River Generating Station	Calpine Fore River Energy Center, LLC	North Weymouth, MA	3 TWh	Jul 2003	Jul 2026	Natural Gas : 92.0% Distillate Fuel Oil : 8.0%
Newington Energy Center	Essential Power Operating Services, LLC	Newington, NH	2 TWh	Sep 2002	Jul 2026	Natural Gas : 92.9% Distillate Fuel Oil : 7.1%
CPV Towantic Energy Center	CPV Towantic, LLC	Oxford, CT	6 TWh	Apr 2018	Jul 2026	Natural Gas
Lempster Wind LLC	Avangrid Power LLC	Lempster, NH	62 GWh	Nov 2008	Jul 2026	Wind
Kleen Energy Systems	Kleen Energy Systems, LLC	Middletown, CT	4 TWh	Jun 2011	Jul 2026	Natural Gas : 98.0% Distillate Fuel Oil : 2.0%
Kibby Wind Facility	Helix Maine Wind Development, LLC	Chain of Ponds, ME	245 GWh	Sep 2009	Jul 2026	Wind
Oakfield Wind Project	Onward Energy	City of Oakfield, ME	330 GWh	Sep 2015	Jul 2026	Wind
Sheffield Wind	Evergreen Wind, LLC	Sheffield, VT	57 GWh	Sep 2011	Jul 2026	Wind
New England Wind LLC	Avangrid Power LLC	Florida, MA	76 GWh	Nov 2012	Jul 2026	Wind
Bingham Wind	Onward Energy	Bingham, ME	475 GWh	Nov 2016	Jul 2026	Wind
Fort Hill 1, 2, 3 & 4	Connecticut Mun Elec Engy Coop	Uncasville, CT	653 MWh	Jul 2010	Jul 2026	Distillate Fuel Oil
Water Treatment 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	394 MWh	Sep 2010	Jul 2026	Distillate Fuel Oil
Berkshire Wind Power Project	Massachusetts Mun Wholes Electric Co	Lanesboro, MA	28 GWh	Apr 2011	Jul 2026	Wind
Kingdom Community Wind	Green Mountain Power Corp	Lowell, VT	168 GWh	Oct 2012	Jul 2026	Wind
Granite Reliable Power	NexteraEnergy	Dummer, NH	199 GWh	Jan 2012	Jul 2026	Wind
Mt Wachusett Community College	Mt Wachusett Community College	Gardner, MA	5 GWh	Feb 2011	Jul 2026	Wind
Block Island Wind Farm	Deepwater Wind Block Island LLC	NA, RI	81 GWh	Nov 2016	Jul 2026	Wind
Cellu Tissue	Dunn Paper East Hartford, LLC	East Hartford, CT	11 GWh	Apr 2009	Jul 2026	Natural Gas
Groton Wind LLC	Avangrid Power LLC	Groton, NH	104 GWh	Nov 2012	Jul 2026	Wind
Eastern Maine Medical Center	Eastern Maine Medical Center	Bangor, ME	26 GWh	Sep 2006	Jul 2026	Natural Gas
UCONN Cogen Facility	University of Connecticut	Storrs, CT	111 GWh	Feb 2006	Jul 2026	Natural Gas : 95.1% Distillate Fuel Oil : 4.9%
UNH 7.9 MW Plant	Emcor Energy Services	Durham, NH	51 GWh	Aug 2006	Jul 2026	Landfill Gas : 52.2% Natural Gas : 45.1% Distillate Fuel Oil : 2.7%
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	132 GWh	Mar 2005	Jul 2026	Natural Gas
West Greenwich Solar	RWE Clean Energy	West Greenwich, RI	2 GWh	Apr 2013	Jul 2026	Solar
Georgia Mountain Community Wind Farm	Greenbacker Renewable Energy Corporation	Milton, VT	25 GWh	Nov 2012	Jul 2026	Wind
Cottage Street Solar Facility	Western Massachusetts Electric Company	Springfield, MA	4 GWh	Apr 2014	Jul 2026	Solar
Cape Cod Air Force Station - 6 SWS	US Space Force	Sagamore, MA	6 GWh	Dec 2013	Jul 2026	Wind
Frito Lay Incorporated	Frito Lay Incorporated Dayville	Dayville, CT	25 GWh	Feb 2009	Jul 2026	Natural Gas
Hancock Wind Plant	Onward Energy	T22 MD, ME	115 GWh	Nov 2016	Jul 2026	Wind
Fusion Solar Center LLC	Fusion Solar Centre, L.L.C	Baltic, CT	38 GWh	Feb 2018	Jul 2026	Solar
Dept of Corrections NCCI Wind	Dept of Corrections NCCI Wind	Gardner, MA	2 GWh	Oct 2013	Jul 2026	Wind
Jericho Power	Jericho Power LLC	Berlin, NH	23 GWh	Dec 2015	Jul 2026	Wind
Passadumkeag Windpark LLC	Southern Power Co	Greenbush, ME	135 GWh	Jun 2016	Jul 2026	Wind
Johnston LFG Turbine Plant	Rhode Island LFG Genco	Johnston, RI	170 GWh	Apr 2013	Jul 2026	Landfill Gas
WED Coventry 6	Greenbacker Renewable Energy Corporation	Coventry, RI	8 GWh	Jul 2016	Jul 2026	Wind
Backus Microgrid Project	Connecticut Mun Elec Engy Coop	Norwich, CT	828 MWh	Jul 2014	Jul 2026	Distillate Fuel Oil
Antares-GRE 314 East Lyme LLC	MN8 Energy LLC	East Lyme, CT	4 GWh	May 2014	Jul 2026	Solar
NBC Field's Point Wind Farm	Narragansett Bay Commission	Providence, RI	7 GWh	Sep 2012	Jul 2026	Wind
Framingham State University Plant	Framingham State University	Framingham, MA	48 MWh	May 1974	Jul 2026	Solar : 62.5% Distillate Fuel Oil : 37.5%
Spring Hill Road	AES Distributed Energy	Barre, MA	306 MWh	Nov 2015	Jul 2026	Solar
Exelon West Medway II LLC	Constellation Power, Inc	Medway, MA	231 GWh	Feb 2019	Jul 2026	Natural Gas : 94.7% Kerosene : 5.3%
Antrim Wind	Antrim Wind Energy LLC	Antrim, NH	79 GWh	Nov 2019	Jul 2026	Wind
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	21 GWh	Jul 2015	Jul 2026	Natural Gas
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	18 GWh	Oct 2015	Jul 2026	Natural Gas : 85.3% Solar : 14.7%
Southbridge Solar	AES Distributed Energy	Southbridge, MA	2 GWh	Feb 2016	Jul 2026	Solar
GMP Solar - Richmond	Green Mountain Power Corp	Richmond, VT	3 GWh	Sep 2016	Jul 2026	Solar
GMP Solar - Panton Hybrid	Green Mountain Power Corp	Panton, VT	8 GWh	Nov 2016	Jul 2026	Solar
GMP Solar - Hartford	Green Mountain Power Corp	Hartford, VT	7 GWh	Nov 2016	Jul 2026	Solar
GMP Solar - Williston	Green Mountain Power Corp	Williston, VT	6 GWh	Oct 2016	Jul 2026	Solar
GMP Solar - Williamstown	Green Mountain Power Corp	Williamstown, VT	7 GWh	Nov 2016	Jul 2026	Solar
Salem Harbor Power Development LP	Salem Harbor Power Development LP	Salem, MA	1 TWh	Apr 2018	Jul 2026	Natural Gas
Deerfield Wind LLC	Avangrid Power LLC	Searsburg, VT	94 GWh	Nov 2017	Jul 2026	Wind
CED Foster	RWE Clean Energy	Foster, RI	3 GWh	Nov 2017	Jul 2026	Solar
Woods Hill Solar	Woods Hill Solar, LLC	Pomfret, CT	22 GWh	Nov 2018	Jul 2026	Solar
Coolidge Solar 1, LLC	Coolidge Solar I, LLC	Ludlow, VT	26 GWh	Nov 2018	Jul 2026	Solar
Southwick Solar PV	NSTAR Electric Company	Southwick, MA	8 GWh	Dec 2018	Jul 2026	Solar
Montague Site 36-Grosolar	NSTAR Electric Company	Millers Falls, MA	6 GWh	Sep 2018	Jul 2026	Solar
Richmond NMCA	AES Distributed Energy	Wood River Junction, RI	6 GWh	Nov 2018	Jul 2026	Solar
Founders Homestead Farms Solar	AES Distributed Energy	Portsmouth, RI	5 GWh	Nov 2019	Jul 2026	Solar
GMP Solar/Storage-Milton Hybrid	Green Mountain Power Corp	Milton, VT	7 GWh	Aug 2019	Jul 2026	Solar
GMP Solar/Storage-Ferrisburgh Hybrid	Green Mountain Power Corp	Ferrisburgh, VT	8 GWh	Aug 2019	Jul 2026	Solar
GMP Solar/Storage-Essex Hybrid	Green Mountain Power Corp	Essex, VT	7 GWh	Aug 2019	Jul 2026	Solar
DWW Solar ll	DWW Solar ll LLC	Simsbury, CT	47 GWh	Nov 2019	Jul 2026	Solar
Dry Bridge Solar (Brown University)	MN8 Energy LLC	North Kingstown, RI	63 GWh	Oct 2023	Jul 2026	Solar
Vineyard Wind 1	Vineyard Wind 1 LLC	Edgartown, MA	564 GWh	-	Jul 2026	Wind
Weaver Wind	Greenbacker Renewable Energy Corporation	Township 16, ME	215 GWh	Nov 2020	Jul 2026	Wind
Sanford Solar	Sanford Airport Solar, LLC	Sanford, ME	89 GWh	Oct 2020	Jul 2026	Solar
University Solar, LLC	AES Distributed Energy	West Greenwich, RI	29 GWh	Nov 2019	Jul 2026	Solar
Farmington Solar	Farmington Solar, LLC	Farmington, ME	127 GWh	Sep 2021	Jul 2026	Solar
Quinebaug Solar	Quinebaug Solar, LLC	Canterbury, CT	76 GWh	Nov 2021	Jul 2026	Solar
Gravel Pit Solar, LLC	Gravel Pit Solar, LLC	East Windsor, CT	205 GWh	Jan 2025	Jul 2026	Solar
Robin Hollow Solar	Robin Hollow Solar, LLC	West Greenwich, RI	71 GWh	Nov 2023	Jul 2026	Solar
Three Corners Solar	Three Corners Solar, LLC	Unity, ME	196 GWh	Jun 2024	Jul 2026	Solar
Moscow	Greenbacker Renewable Energy Corporation	Moscow, ME	127 GWh	May 2025	Jul 2026	Wind
Downeast Wind	Downeast Wind, LLC	Columbia, ME	382 GWh	Dec 2024	Jul 2026	Wind

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