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	Jul 2026
Annual Generation	111.1 TWh
Power Plants	1,629
Utilities	833
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 \| 54.9% Nuclear \| 25% Wind \| 5.1% Water \| 4.5% Other Fuel \| 4.4% Solar \| 1.6% Coal \| 0.1%

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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
Acushnet Hawes Reed Road	CleanCapital Holdings	Dartmouth, MA	2 GWh	Jun 2012	Dec 2025	Solar
IKEA New Haven Rooftop PV & Fuel Cell	IKEA Property Inc	New Haven, CT	3 GWh	Jun 2012	Dec 2025	Natural Gas : 71.5% Solar : 28.5%
OSG Solar 1 LLC	Navisun LLC	Orange, MA	3 GWh	Jun 2012	Dec 2025	Solar
Dartmouth II Solar	RWE Clean Energy	Dartmouth, MA	3 GWh	May 2012	Dec 2025	Solar
Town of Uxbridge MA at Commerce Dr	Luminace Solar Net Metering, LLC	Uxbridge, MA	2 GWh	May 2012	Dec 2025	Solar
Town of Norfolk MA at Medway Branch	Luminace Solar Massachusetts, LLC	Norfolk, MA	2 GWh	May 2012	Dec 2025	Solar
Easthampton Landfill-City of Easthampton	CleanCapital Holdings	Easthampton, MA	3 GWh	May 2012	Dec 2025	Solar
Axio Green LLC	Altus Power America Management, LLC	Greenfield Township, MA	2 GWh	May 2012	Dec 2025	Solar
126 Grove Solar LLC	Altus Power America Management, LLC	Franklin, MA	2 GWh	May 2012	Dec 2025	Solar
CCSU Fuel Cell Project	New Britain Renewable Energy, LLC	New Britain, CT	7 GWh	Mar 2012	Dec 2025	Natural Gas
Westford Solar Park	MN8 Energy LLC	Westford, MA	4 GWh	Mar 2012	Dec 2025	Solar
Fairhaven Wind	Fairhaven Wind LLC	Fairhaven, MA	3 GWh	Mar 2012	Dec 2025	Wind
433 Purchase Solar NG, LLC	NuGen Capital Management	Swansea, MA	4 GWh	Mar 2012	Dec 2025	Solar
NFM Solar Power LLC	FirstLight Power Resources, Inc. - MA	Northfield, MA	2 GWh	Feb 2012	Dec 2025	Solar
Agawam Solar	Citizens Enterprises Corporation	Agawam, MA	2 GWh	Feb 2012	Dec 2025	Solar
WED NK Green	WED NK Green LLC	North Kingstown, RI	3 GWh	Feb 2012	Dec 2025	Wind
Scituate Wind	Scituate Wind LLC	Scituate, MA	3 GWh	Feb 2012	Dec 2025	Wind
Granite Reliable Power	NexteraEnergy	Dummer, NH	192 GWh	Jan 2012	May 2026	Wind
Dorchester Solar Site	Massachusetts Electric Co	Dorchester, MA	2 GWh	Dec 2011	Dec 2025	Solar
Record Hill Wind	Record Hill Wind LLC	Roxbury, ME	110 GWh	Dec 2011	Dec 2025	Wind
Indian Orchard PV Facility	Western Massachusetts Electric Company	Springfield, MA	2 GWh	Nov 2011	Dec 2025	Solar
Holyoke Solar Cooperative at Mueller	Holyoke Solar LLC	Holyoke, MA	4 GWh	Nov 2011	Dec 2025	Solar
Spruce Mountain WInd	CPV Spruce Mountain Wind LLC	Bryant Pond, ME	53 GWh	Nov 2011	Dec 2025	Wind
Berkshire 1	PPS Berkshire Solar LLC	Sheffield, MA	2 GWh	Nov 2011	Dec 2024	Solar
Danbury Hospital Cogen Plant	Danbury Hospital	Danbury, CT	22 GWh	Oct 2011	Dec 2025	Natural Gas
Sheffield Wind	Evergreen Wind, LLC	Sheffield, VT	57 GWh	Sep 2011	May 2026	Wind
Charlestown Wind Turbine	MWRA Charlestown	Charlestown, MA	1 GWh	Sep 2011	Dec 2025	Wind
Southbridge Landfill Gas-to-Energy	Southbridge Recycling and Disposal Park	Southbridge, MA	10 GWh	Sep 2011	Dec 2025	Landfill Gas
158th Fighter Wing Solar Farm	158th Fighter Wing	South Burlington, VT	1 GWh	Aug 2011	Dec 2025	Solar
Kleen Energy Systems	Kleen Energy Systems, LLC	Middletown, CT	4 TWh	Jun 2011	May 2026	Natural Gas : 97.9% Distillate Fuel Oil : 2.1%
Rollins Wind Project	Evergreen Wind, LLC	Winn Village, ME	147 GWh	Jun 2011	Dec 2025	Wind
GenConn Middletown LLC	GenConn Middletown LLC	Middletown, CT	6 GWh	May 2011	Dec 2025	Kerosene : 77.4% Natural Gas : 22.6%
Chittenden County Solar Partners	Chittenden County Solar Partners LLC	South Burlington, VT	3 GWh	Apr 2011	Dec 2024	Solar
Berkshire Wind Power Project	Massachusetts Mun Wholes Electric Co	Lanesboro, MA	32 GWh	Apr 2011	May 2026	Wind
Ipswich Wind Turbine	Town of Ipswich - (MA)	Ipswich, MA	2 GWh	Apr 2011	Dec 2025	Wind
Dartmouth Solar	RWE Clean Energy	Dartmouth, MA	2 GWh	Feb 2011	Dec 2025	Solar
Mt Wachusett Community College	Mt Wachusett Community College	Gardner, MA	4 GWh	Feb 2011	May 2026	Wind
Haverhill Solar Power Project	Massachusetts Electric Co	Haverhill, MA	1 GWh	Nov 2010	Dec 2025	Solar
Fishers Island 1	Connecticut Mun Elec Engy Coop	Fisher's Island, NY	129 MWh	Nov 2010	Dec 2025	Distillate Fuel Oil
Silver Lake Solar Photovoltaic Facility	Western Massachusetts Electric Company	Pittsfield, MA	2 GWh	Nov 2010	Dec 2025	Solar
Water Treatment 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	494 MWh	Sep 2010	May 2026	Distillate Fuel Oil
Fort Hill 1, 2, 3 & 4	Connecticut Mun Elec Engy Coop	Uncasville, CT	734 MWh	Jul 2010	May 2026	Distillate Fuel Oil
Notus Wind 1	Notus Clean Energy LLC	E. Falmouth, MA	5 GWh	Jun 2010	Dec 2025	Wind
Bridge Street 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	452 MWh	Jun 2010	Dec 2025	Distillate Fuel Oil
Gary Court 1 & 2	Connecticut Mun Elec Engy Coop	Groton, CT	381 MWh	Jun 2010	Dec 2025	Distillate Fuel Oil
GenConn Devon LLC	GenConn Devon LLC	Milford, CT	15 GWh	May 2010	Dec 2025	Kerosene : 75.4% Natural Gas : 24.6%
NEDC Solar Site	Massachusetts Electric Co	Whitinsville, MA	953 MWh	May 2010	Dec 2025	Solar
Foxwoods CoGen	Foxwoods Resort Casino	Mashantucket, CT	11 GWh	May 2010	Dec 2025	Natural Gas
Sikorsky Aircraft CHP	Sikorsky Aircraft Corporation	Stratford, CT	65 GWh	May 2010	Dec 2025	Natural Gas : 99.9%
VPPSA Project 10	Vermont Public Power Supply Authority	Swanton, VT	1 GWh	Apr 2010	Dec 2025	Distillate Fuel Oil
LNG 1 & 2	Connecticut Mun Elec Engy Coop	Norwich, CT	382 MWh	Mar 2010	Dec 2025	Distillate Fuel Oil
Lebanon Pines 1 & 2	Connecticut Mun Elec Engy Coop	Lebanon, CT	374 MWh	Mar 2010	Dec 2025	Distillate Fuel Oil
Stetson Wind II	Evergreen Wind, LLC	Danforth, ME	55 GWh	Feb 2010	Dec 2025	Wind
Jewett City 1	Connecticut Mun Elec Engy Coop	Jewett City, CT	139 MWh	Jan 2010	Dec 2025	Distillate Fuel Oil
Princeton Wind Farm	Town of Princeton - (MA)	Princeton, MA	4 GWh	Dec 2009	Dec 2025	Wind
MA Military Reservation Wind Project	Air Force Civil Engineer Center	Otis ANG Base Bourne, MA	5 GWh	Nov 2009	Dec 2025	Wind
Fox Island Wind LLC	Fox Island Wind LLC	Vinalhaven, ME	9 GWh	Oct 2009	Dec 2025	Wind
Kibby Wind Facility	Helix Maine Wind Development, LLC	Chain of Ponds, ME	242 GWh	Sep 2009	May 2026	Wind
HSCo CHP	Cartier Energy, LLC	Hartford, CT	28 GWh	Sep 2009	Dec 2025	Natural Gas
Waterbury Generation	Engie North America	Waterbury, CT	55 GWh	May 2009	Dec 2025	Natural Gas : 99.1% Kerosene : 0.9%
Cellu Tissue	Dunn Paper East Hartford, LLC	East Hartford, CT	12 GWh	Apr 2009	May 2026	Natural Gas
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	22 GWh	Feb 2009	Dec 2025	Landfill Gas
Frito Lay Incorporated	Frito Lay Incorporated Dayville	Dayville, CT	25 GWh	Feb 2009	May 2026	Natural Gas
Wesleyan University Cogen 1	Wesleyan University	Middletown, CT	4 GWh	Jan 2009	Dec 2025	Natural Gas
Stetson Wind I	Evergreen Wind, LLC	Danforth, ME	146 GWh	Dec 2008	Dec 2025	Wind
Orono Hydro Station	Brookfield Black Bear Hydro, LLC	Orono, ME	6 GWh	Dec 2008	Dec 2025	Water
Lempster Wind LLC	Avangrid Power LLC	Lempster, NH	62 GWh	Nov 2008	May 2026	Wind
Beaver Ridge Wind	CPV Beaver Ridge Wind LLC	Freedom, ME	11 GWh	Oct 2008	Dec 2025	Wind
Smith College Central Heating Plant	The Trustees of Smith College	Northampton, MA	6 GWh	Sep 2008	Dec 2025	Natural Gas
Pepperidge Farm Bloomfield	Pepperidge Farm, Inc.- Bloomfield	Bloomfield, CT	15 GWh	Jul 2008	Dec 2024	Natural Gas
New Milford Gas Recovery	WM Renewable Energy LLC	New Milford, CT	4 GWh	Apr 2008	Dec 2025	Landfill Gas
Kimberly Clark-Unit 1,2,3	Kimberly-Clark Corporation	New Milford, CT	233 GWh	Mar 2008	Dec 2025	Natural Gas
Fitchburg Gas Recovery	WM Renewable Energy LLC	Westminster, MA	32 GWh	Sep 2007	Dec 2025	Landfill Gas
Fairfield University CHP Plant	Fairfield University	Fairfield, CT	23 GWh	Sep 2007	Dec 2025	Natural Gas
Central Heating Plant	University of Massachusetts Amherst	Amherst, MA	80 GWh	Sep 2007	Dec 2025	Natural Gas : 96.3% Distillate Fuel Oil : 3.7%
Jiminy Peak Wind QF	Jiminy Peak Mountain Resort, LLC	Hancock, MA	2 MWh	Jul 2007	Apr 2025	Wind
Amherst College Co Gen	Amherst College	Amherst, MA	8 GWh	Oct 2006	Dec 2025	Natural Gas
Eastern Maine Medical Center	Eastern Maine Medical Center	Bangor, ME	28 GWh	Sep 2006	May 2026	Natural Gas
UNH 7.9 MW Plant	Emcor Energy Services	Durham, NH	53 GWh	Aug 2006	May 2026	Landfill Gas : 55.5% Natural Gas : 42.0% Distillate Fuel Oil : 2.5%
UCONN Cogen Facility	University of Connecticut	Storrs, CT	112 GWh	Feb 2006	May 2026	Natural Gas : 95.2% Distillate Fuel Oil : 4.8%
Greater New Bedford LFG Utiliz. Facility	CommonWealth New Bedford Energy LLC	New Bedford, MA	13 GWh	Sep 2005	Dec 2025	Landfill Gas
Ridgewood Providence Power	Rhode Island LFG Genco	Johnston, RI	4 GWh	Jul 2005	Dec 2025	Landfill Gas
Coventry Clean Energy Corporation	Washington Electric Coop - (VT)	Coventry, VT	57 GWh	Jun 2005	Dec 2025	Landfill Gas
Rand Whitney CHP Plant	Rand Whitney Containerboard L.P.	Montville, CT	132 GWh	Mar 2005	May 2026	Natural Gas
Milford Power Project	Milford Power Co LLC	Milford, CT	3 TWh	Jan 2004	May 2026	Natural Gas
Ameresco Chicopee Energy	AMERESCO Chicopee Energy LLC	Chicopee, MA	4 GWh	Jan 2004	Dec 2025	Landfill Gas
Fore River Generating Station	Calpine Fore River Energy Center, LLC	North Weymouth, MA	3 TWh	Jul 2003	May 2026	Natural Gas : 92.7% Distillate Fuel Oil : 7.3%
Waterside Power, LLC	Waterside Power, LLC	Stamford, CT	2 GWh	May 2003	Dec 2025	Distillate Fuel Oil
Granite Ridge	Granite Ridge Energy LLC	Londonderry, NH	4 TWh	Feb 2003	May 2026	Natural Gas
Williams College - Campus CHP	President & Trustees of Williams College	Williamstown, MA	3 GWh	Feb 2003	Dec 2025	Natural Gas : 98.4% Distillate Fuel Oil : 1.6%
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	157 GWh	Dec 2002	Dec 2025	Natural Gas
ANP Bellingham Energy Project	Bellingham Power Generation LLC	Bellingham, MA	3 TWh	Oct 2002	May 2026	Natural Gas
Bradley Energy Center	Ameresco Select Inc	Windsor Locks, CT	11 GWh	Oct 2002	Dec 2025	Natural Gas
Rhode Island State Energy Center	RISEC Operating Services	Johnston, RI	4 TWh	Sep 2002	Apr 2026	Natural Gas
Newington Energy Center	Essential Power Operating Services, LLC	Newington, NH	2 TWh	Sep 2002	May 2026	Natural Gas : 92.8% Distillate Fuel Oil : 7.2%
Stamford Health Tully Health Center	Stamford Health Tully Health Center	Stamford, CT	5 GWh	Apr 2002	Dec 2025	Natural Gas
Lake Road Generating Plant	Lake Road Generating Co LP	Dayville, CT	6 TWh	Feb 2002	May 2026	Natural Gas
Granby LFG	Industrial Power Services Corp.	Granby, MA	2 GWh	Aug 2001	Dec 2025	Landfill Gas
Wallingford Energy	Wallingford Energy LLC	Wallingford, CT	107 GWh	Jul 2001	Dec 2025	Natural Gas
ANP Blackstone Energy Project	ANP Blackstone Energy Company LLC	Blackstone, MA	3 TWh	May 2001	May 2026	Natural Gas

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	442.5 GWh	4
#24	Dominion Energy South Carolina, Inc.	25.3 TWh	83
#13	Duke Energy Carolinas	112.6 TWh	577
#17	Duke Energy Progress East	64.5 TWh	565
#50	Duke Energy Progress West	4.5 TWh	15
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	33.9 TWh	25
#12	New York Independent System Operator	134.3 TWh	1,299
#1	PJM Interconnection, LLC	882.8 TWh	2,652
#31	South Carolina Public Service Authority	18.5 TWh	35
#59	Southeastern Power Administration	1.3 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	169.4 TWh	2,135
#9	Tennessee Valley Authority	163.4 TWh	207
#10	Florida Power & Light Co.	152.2 TWh	187
#12	New York Independent System Operator	134.3 TWh	1,299
#13	Duke Energy Carolinas	112.6 TWh	577
#15	ISO New England	111.1 TWh	1,629
#16	Bonneville Power Administration	91.6 TWh	167
#17	Duke Energy Progress East	64.5 TWh	565
#18	PacifiCorp East	60.9 TWh	222
#19	Salt River Project Agricultural Improvement and Power District	60.3 TWh	49