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
Mainely Solar (Wyman Hill Solar LLC)	Wyman Hill Solar, LLC	Rumford, ME	6 GWh	Nov 2022	Dec 2025	Solar
Woods Hill Solar	Woods Hill Solar, LLC	Pomfret, CT	22 GWh	Nov 2018	May 2026	Solar
Woodland Avenue Solar 1	Woodland Avenue Solar 1, LLC	Seekonk, MA	9 GWh	Jul 2020	Dec 2025	Solar
Turnkey Landfill Gas Recovery	WM Renewable Energy LLC	Rochester, NH	39 GWh	Jan 1992	Dec 2025	Landfill Gas
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	22 GWh	Feb 2009	Dec 2025	Landfill Gas
New Milford Gas Recovery	WM Renewable Energy LLC	New Milford, CT	4 GWh	Apr 2008	Dec 2025	Landfill Gas
Fitchburg Gas Recovery	WM Renewable Energy LLC	Westminster, MA	32 GWh	Sep 2007	Dec 2025	Landfill Gas
Wind Colebrook South	Wind Colebrook South	Colebrook, CT	11 GWh	Oct 2015	May 2026	Wind
Wilmarth Solar	Wilmarth Lane Solar 1, LLC	Plainville, MA	8 GWh	Jan 2020	Dec 2024	Solar
White Rock Road LLC	White Rock Road LLC	Westerly, RI	11 GWh	Nov 2022	Dec 2025	Solar
White Brook Renewables PV	White Brook Renewables LLC	West Greenwich, RI	7 GWh	Nov 2024	Dec 2025	Solar
Wheelabrator Bridgeport	Wheelabrator Environmental Systems	Bridgeport, CT	430 GWh	Jun 1988	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Saugus	Wheelabrator Environmental Systems	Saugus, MA	180 GWh	Jul 1985	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Lisbon	Wheelabrator Environmental Systems	Lisbon, CT	101 GWh	Sep 1995	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Concord Facility	Wheelabrator Environmental Systems	Concord, NH	93 GWh	Mar 1989	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator North Andover	Wheelabrator Environmental Systems	North Andover, MA	240 GWh	Apr 1985	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Wheelabrator Millbury Facility	Wheelabrator Environmental Systems	Millbury, MA	288 GWh	Aug 1987	May 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Whatley Renewables	Whatley Renewables, LLC	Whatley, MA	2 GWh	Sep 2020	Dec 2025	Solar
Westminster Renewables, LLC CSG	Westminster Renewables, LLC	Westminster, MA	2 GWh	Sep 2018	Dec 2025	Solar
Indian Orchard PV Facility	Western Massachusetts Electric Company	Springfield, MA	2 GWh	Nov 2011	Dec 2025	Solar
Cottage Street Solar Facility	Western Massachusetts Electric Company	Springfield, MA	4 GWh	Apr 2014	May 2026	Solar
Silver Lake Solar Photovoltaic Facility	Western Massachusetts Electric Company	Pittsfield, MA	2 GWh	Nov 2010	Dec 2025	Solar
Westbrook Energy Center Power Plant	Westbrook Energy Center	Westbrook, ME	4 TWh	Apr 2001	May 2026	Natural Gas
Overlook	Westbound Solar 3, LLC	Westminster, MA	7 GWh	Feb 2023	Dec 2025	Solar
Niagara Bottling - Bloomfield	Westbound Solar 3, LLC	Bloomfield, CT	4 GWh	Oct 2022	Dec 2025	Solar
Bates College Skowhegan	Westbound Solar 3, LLC	Skowhegan, ME	8 GWh	Aug 2023	Dec 2025	Solar
Wesleyan University Cogen 1	Wesleyan University	Middletown, CT	4 GWh	Jan 2009	Dec 2025	Natural Gas
Wendell MA 1	Wendell MA 1 LLC	Wendell, MA	1 GWh	Nov 2018	Dec 2025	Solar
Wellesley College Central Utility Plant	Wellesley College	Wellesley, MA	10 GWh	May 1985	Dec 2025	Natural Gas
WED Shun III, LLC	WED Shun III, LLC	Johnston, RI	8 GWh	Dec 2018	Dec 2025	Wind
WED Shun II, LLC	WED Shun II, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Shun I, LLC	WED Shun I, LLC	Johnston, RI	7 GWh	Dec 2018	May 2026	Wind
WED Plainfield, LLC	WED Plainfield, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Plainfield III, LLC	WED Plainfield III, LLC	Johnston, RI	7 GWh	Dec 2018	Dec 2025	Wind
WED Plainfield II, LLC	WED Plainfield II, LLC	Johnston, RI	8 GWh	Dec 2018	Dec 2025	Wind
WED NK Green	WED NK Green LLC	North Kingstown, RI	3 GWh	Feb 2012	Dec 2025	Wind
WED Green Hill, LLC	WED Green Hill, LLC	Johnston, RI	6 GWh	Dec 2018	May 2026	Wind
WED Coventry 2	WED Coventry Two, LLC	Coventry, RI	9 GWh	Jul 2016	May 2026	Wind
WED Coventry 3	WED Coventry Three, LLC	Coventry, RI	3 GWh	Jul 2016	Dec 2025	Wind
WED Coventry Seven, LLC	WED Coventry Seven, LLC	Coventry, RI	5 GWh	Nov 2020	Dec 2025	Solar
WED Coventry 1	WED Coventry One, LLC	Coventry, RI	3 GWh	Sep 2016	Dec 2025	Wind
WED Coventry 4	WED Coventry Four, LLC	Coventry, RI	3 GWh	Jul 2016	Dec 2025	Wind
Webster Solar	Webster Solar, LLC	Webster, MA	1 GWh	Nov 2017	Dec 2025	Solar
Silver Maple	WEB Silver Maple Wind LLC	Clifton, ME	64 GWh	Sep 2022	Dec 2025	Wind
WEB Brookfield	WEB Brookfield Solar LLC	Brookfield, MA	6 GWh	Nov 2021	Dec 2025	Solar
Brimfield	WEB Brimfield Solar LLC	Brimfield, MA	3 GWh	Nov 2021	Dec 2025	Solar
Waterside Power, LLC	Waterside Power, LLC	Stamford, CT	2 GWh	May 2003	Dec 2025	Distillate Fuel Oil
Wrightsville Hydro Plant	Washington Electric Coop - (VT)	Montpelier, VT	374 MWh	Aug 1985	Dec 2025	Water
Coventry Clean Energy Corporation	Washington Electric Coop - (VT)	Coventry, VT	57 GWh	Jun 2005	Dec 2025	Landfill Gas
Ware Palmer Road Solar LLC CSG	Ware Palmer Road Solar LLC	Ware, MA	5 GWh	May 2021	Dec 2024	Solar
Walpole Solar 2	Walpole Solar 2, LLC	Walpole, MA	4 GWh	Mar 2014	Dec 2025	Solar
Wallingford Solar	Wallingford Renewable Energy, LLC	Wallingford, CT	15 GWh	Aug 2021	Dec 2025	Solar
Wallingford Energy	Wallingford Energy LLC	Wallingford, CT	107 GWh	Jul 2001	Dec 2025	Natural Gas
Walden Solar Maine V	Walden Solar Maine V LLC	Leeds, ME	36 GWh	Nov 2024	Dec 2025	Solar
Wachusett Solar	Wachusett Solar, LLC	Rutland, MA	3 GWh	Jul 2019	Dec 2025	Solar
Hopkinton Phase 2	Vista Solar, Inc.	Ashaway, RI	4 GWh	Aug 2020	Dec 2025	Solar
Vineyard Wind 1	Vineyard Wind 1 LLC	Edgartown, MA	363 GWh	-	May 2026	Wind
West Tisbury Generating Facility	Vineyard Reliability LLC	West Tisbury, MA	5 GWh	Dec 1974	Sep 2025	Distillate Fuel Oil
Oak Bluffs Diesel Generating Facility	Vineyard Reliability LLC	Oak Bluffs, MA	3 GWh	Dec 1968	Sep 2025	Distillate Fuel Oil
Highgate Falls	Village of Swanton - (VT)	Highgate, VT	32 GWh	Jul 1923	Dec 2025	Water
W K Sanders	Village of Morrisville - (VT)	Hyde Park, VT	716 MWh	Jun 1983	Nov 2025	Water
Cadys Falls	Village of Morrisville - (VT)	Morrisville, VT	2 GWh	Jul 1914	Dec 2025	Water
Morrisville	Village of Morrisville - (VT)	Morrisville, VT	5 GWh	Jul 1924	Dec 2025	Water
VPPSA Project 10	Vermont Public Power Supply Authority	Swanton, VT	1 GWh	Apr 2010	Dec 2025	Distillate Fuel Oil
FedEx Middletown	VCP Realty, LLC	Middletown, CT	2 GWh	Oct 2024	Dec 2025	Solar
Valley Sun Solar	Valley Sun Solar LLC	Grand Isle, ME	3 GWh	Nov 2024	Dec 2025	Solar
Cape Cod Air Force Station - 6 SWS	US Space Force	Sagamore, MA	6 GWh	Dec 2013	May 2026	Wind
Upton Community Solar	Upton Solar, LLC	Upton, MA	3 GWh	Aug 2017	Dec 2025	Solar
Univ of Massachusetts Medical Center	University of Massachusetts Medical	Worcester, MA	63 GWh	Mar 1974	Dec 2025	Natural Gas : 99.3% Distillate Fuel Oil : 0.6%
Central Heating Plant	University of Massachusetts Amherst	Amherst, MA	80 GWh	Sep 2007	Dec 2025	Natural Gas : 96.3% Distillate Fuel Oil : 3.7%
UCONN Cogen Facility	University of Connecticut	Storrs, CT	112 GWh	Feb 2006	May 2026	Natural Gas : 95.2% Distillate Fuel Oil : 4.8%
Pratt & Whitney	United Technologies	East Hartford, CT	76 GWh	Dec 1991	May 2026	Natural Gas
UI RCP Woodbridge FC	United Illuminating Co	Woodbridge, CT	17 GWh	Nov 2016	Dec 2025	Natural Gas
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	18 GWh	Oct 2015	May 2026	Natural Gas : 84.7% Solar : 15.3%
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	21 GWh	Jul 2015	May 2026	Natural Gas
UDR Glastonbury Fuel Cell	UIL Distributed Resources, LLC	Glastonbury, CT	16 GWh	Jan 2016	Dec 2025	Natural Gas
UB Fuel Cell	UB Fuel Cell	Bridgeport, CT	10 GWh	Mar 2015	Dec 2025	Natural Gas
TPE RI WA2 Solar	TPE RI WA2, LLC	Warren, RI	6 GWh	May 2024	Dec 2025	Solar
TPE RI WA1 Solar	TPE RI WA1, LLC	Warren, RI	6 GWh	May 2024	Dec 2025	Solar
West Boylston Community Shared Solar	Town of West Boylston - (MA)	West Boylston, MA	447 MWh	Nov 2016	Dec 2025	Solar
Nebraska Valley Solar Farm	Town of Stowe - (VT)	Stowe, VT	1 GWh	Jul 2016	Dec 2025	Solar
Stafford MS Ground Mount Community Solar	Town of Stafford - (CT)	Stafford, CT	3 GWh	Jun 2016	Dec 2025	Solar
Shrewsbury	Town of Shrewsbury - (MA)	Shrewsbury, MA	2 GWh	Oct 1969	Dec 2025	Distillate Fuel Oil
Centech Gas Generator	Town of Shrewsbury - (MA)	Shrewsbury, MA	428 MWh	Mar 2019	Dec 2025	Natural Gas
Princeton Wind Farm	Town of Princeton - (MA)	Princeton, MA	4 GWh	Dec 2009	Dec 2025	Wind
Wilkins Station	Town of Marblehead - (MA)	Marblehead, MA	32 MWh	Oct 1975	Dec 2025	Distillate Fuel Oil
Ipswich Wind Turbine	Town of Ipswich - (MA)	Ipswich, MA	2 GWh	Apr 2011	Dec 2025	Wind
High Street Station	Town of Ipswich - (MA)	Ipswich, MA	153 MWh	May 1937	Dec 2025	Natural Gas : 92.3% Distillate Fuel Oil : 7.7%
Cherry Street	Town of Hudson - (MA)	Hudson, MA	320 MWh	Apr 1951	Dec 2025	Distillate Fuel Oil : 58.5% Natural Gas : 41.5%
Town of Foxborough - Landfill (SREC II)	Town of Foxborough - Landfill (SREC II)	Foxborough, MA	2 GWh	Jul 2017	Dec 2025	Solar
Potter Station 2	Town of Braintree - (MA)	Braintree, MA	41 GWh	Jun 1963	Dec 2025	Natural Gas : 61.2% Distillate Fuel Oil : 38.8%
ME-EDFR-Phase I-Embden	Tower Solar Partners, LLC	Embden, ME	8 GWh	Nov 2023	Dec 2025	Solar
CTGB Maloney and Webster	TotalEnergies Renewables USA LLC	Cheshire, CT	3 GWh	Jun 2025	Dec 2025	Solar
CTGB Osborn	TotalEnergies Renewables USA LLC	Somers, CT	3 GWh	Nov 2024	Dec 2025	Solar
Toray Plastic America's CHP Plant	Toray Plastics America	North Kingstown, RI	157 GWh	Dec 2002	Dec 2025	Natural Gas
Pejepscot Hydroelectric Project	Topsham Hydro Partners	Topsham, ME	50 GWh	Oct 1987	Dec 2025	Water
Tiverton Power Plant	Tiverton Power LLC	Tiverton, RI	2 TWh	Feb 2000	Dec 2025	Natural Gas
Three Corners Solar	Three Corners Solar, LLC	Unity, ME	197 GWh	Jun 2024	May 2026	Solar
Theodore Drive Community Solar	Theodore Drive Solar, LLC	Westminster, MA	2 GWh	Feb 2018	Dec 2025	Solar
Smith College Central Heating Plant	The Trustees of Smith College	Northampton, MA	6 GWh	Sep 2008	Dec 2025	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