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	103.6 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 \| 57.4% Nuclear \| 25.1% Water \| 7.4% Other Fuel \| 4.5% Wind \| 3.3% Solar \| 1.2% 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
Medway Hydro	Brookfield Black Bear Hydro, LLC	Medway, ME	28 GWh	Dec 1922	Dec 2023	Water
Orono Hydro Station	Brookfield Black Bear Hydro, LLC	Orono, ME	12 GWh	Dec 2008	Dec 2023	Water
Stillwater B	Brookfield Black Bear Hydro, LLC	Old Town, ME	13 GWh	Aug 2013	Dec 2023	Water
Orono B	Brookfield Black Bear Hydro, LLC	Orono, ME	26 GWh	Oct 2013	Dec 2023	Water
Rumford Falls Hydro Facility	Brookfield Power New England	Rumford, ME	290 GWh	Dec 1917	Dec 2023	Water
Shawmut	Brookfield White Pine Hydro LLC	Shawmut, ME	37 GWh	Dec 1912	Dec 2023	Water
Aziscohos Hydroelectric Project	Brookfield White Pine Hydro LLC	Wilson Mills, ME	39 GWh	May 1988	Dec 2023	Water
Wyman Hydro	Brookfield White Pine Hydro LLC	Bingham, ME	502 GWh	Dec 1929	Dec 2023	Water
Williams Hydro	Brookfield White Pine Hydro LLC	Solon, ME	97 GWh	Dec 1938	Dec 2023	Water
Charles E Monty	Brookfield White Pine Hydro LLC	Lewiston, ME	177 GWh	Dec 1989	Dec 2023	Water
Bonny Eagle	Brookfield White Pine Hydro LLC	Hollis, ME	45 GWh	Dec 1909	Dec 2023	Water
Weston Hydro	Brookfield White Pine Hydro LLC	Skowhegan, ME	88 GWh	Dec 1919	Dec 2023	Water
West Buxton	Brookfield White Pine Hydro LLC	Buxton, ME	36 GWh	Dec 1903	Dec 2023	Water
Brunswick Hydro	Brookfield White Pine Hydro LLC	Brunswick, ME	123 GWh	Feb 1982	Dec 2023	Water
Cataract Hydro	Brookfield White Pine Hydro LLC	Saco, ME	2 GWh	Dec 1936	Dec 2023	Water
Deer Rips	Brookfield White Pine Hydro LLC	Auburn, ME	69 GWh	Dec 1902	Dec 2023	Water
Skelton	Brookfield White Pine Hydro LLC	Dayton, ME	137 GWh	Dec 1947	Dec 2023	Water
Gulf Island	Brookfield White Pine Hydro LLC	Lewiston, ME	169 GWh	Dec 1925	Dec 2023	Water
Harris Hydro	Brookfield White Pine Hydro LLC	West Forks, ME	278 GWh	Dec 1953	Dec 2023	Water
Hiram	Brookfield White Pine Hydro LLC	Hiram, ME	54 GWh	Dec 1916	Dec 2023	Water
North Gorham	Brookfield White Pine Hydro LLC	Gorham, ME	9 GWh	Dec 1924	Dec 2023	Water
Bucksport Generation LLC	Bucksport Generation LLC	Bucksport, ME	21 GWh	Jun 1965	Aug 2024	Natural Gas : 98.9% Distillate Fuel Oil : 1.1%
Bullock Road Solar 1	Bullock Road Solar 1, LLC	Freetown, MA	12 GWh	Jun 2018	Dec 2023	Solar
Westport Community Solar Garden	BWC Bass River LLC	Westport, MA	3 GWh	Jun 2017	Dec 2023	Solar
Mendon	BWC Box Pond LLC	Mendon, MA	4 GWh	Nov 2017	Dec 2023	Solar
Dover	BWC Buckmaster Pond LLC	Dover, MA	2 GWh	Jul 2017	Dec 2023	Solar
Adirondack A+B Community Solar Garden	BWC Connecticut River LLC	Westport, MA	8 GWh	Nov 2018	Dec 2023	Solar
Wilbraham	BWC East Brook, LLC	Wilbraham, MA	6 GWh	Nov 2020	Dec 2023	Solar
BWC Gibbs Brook	BWC Gibbs Brook, LLC	Wareham, MA	7 GWh	Nov 2018	Dec 2023	Solar
Westport B Community Solar Garden	BWC Hamilton Brook LLC	Westport, MA	7 GWh	Oct 2018	Dec 2023	Solar
BWC Harlow Brook	BWC Harlow Brook, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2023	Solar
BWC Origination 18	BWC Origination 18, LLC	Mattapoisett, MA	7 GWh	Nov 2018	Dec 2023	Solar
New Bedford (MA) Plymouth	BWC Origination 4, LLC	Plymouth, MA	7 GWh	Jun 2014	Dec 2023	Solar
BWC Pocasset River	BWC Pocasset River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2023	Solar
BWC Swan Pond River CSG	BWC Swan Pond River, LLC	Rehoboth, MA	2 GWh	Nov 2015	Dec 2023	Solar
BWC Wareham River	BWC Wareham River, LLC	Wareham, MA	2 GWh	Nov 2018	Dec 2023	Solar
Lakeville Solar	C2 MA Lakeville, LLC	Lakeville, MA	3 GWh	Nov 2018	Dec 2023	Solar
Fore River Generating Station	Calpine Fore River Energy Center, LLC	North Weymouth, MA	3 TWh	Jul 2003	Sep 2024	Natural Gas : 99.8%
Camelot Wind LLC	Camelot Wind LLC	Plymouth, MA	2 GWh	Sep 2012	Dec 2023	Wind
Canal	Canal Generating LLC	Sandwich, MA	182 GWh	May 1968	Sep 2024	Natural Gas : 78.2% Residual Fuel Oil : 20.4% Distillate Fuel Oil : 1.4%
A Street 1	Captona A Street 1 Johnston LLC	Johnston, RI	2 GWh	Nov 2018	Dec 2023	Solar
A Street 2	Captona A Street 2 Johnston LLC	Johnston, RI	3 GWh	Nov 2018	Dec 2023	Solar
Berkley	Captona Berkley LLC	Berkley, MA	4 GWh	Mar 2017	Dec 2023	Solar
Canton	Captona Canton LLC	Canton, MA	6 GWh	Jul 2012	Dec 2023	Solar
Carver	Captona Carver LLC	North Carver, MA	2 GWh	Apr 2017	Dec 2023	Solar
Chicopee	Captona Chicopee LLC	Chicopee, MA	2 GWh	Mar 2017	Dec 2023	Solar
Hudson	Captona Hudson LLC	Hudson, MA	6 GWh	Apr 2017	Dec 2023	Solar
Kilvert	Captona Kilvert Street Warwick LLC	Warwick, RI	8 GWh	Nov 2018	Dec 2023	Solar
Gold Meadow Farms	Captona Lippitt Ave Cranston LLC	Cranston, RI	27 GWh	Apr 2019	Dec 2023	Solar
North Providence	Captona N.P. LLC	North Providence, RI	3 GWh	Sep 2018	Dec 2023	Solar
Plainfield Pike	Captona Plainfield Pike Johnston LLC	Johnston, RI	4 GWh	May 2019	Dec 2023	Solar
Ravenbrook	Captona Ravenbrook LLC	Carver, MA	7 GWh	Nov 2013	Dec 2023	Solar
Golden Solar	Cardinal Renewables	St. Johnsbury, VT	3 GWh	Oct 2021	Dec 2023	Solar
Hartford Hospital Cogeneration	Cartier Energy, LLC	Hartford, CT	44 GWh	Jun 1988	Dec 2023	Natural Gas : 99.8%
HSCo CHP	Cartier Energy, LLC	Hartford, CT	27 GWh	Sep 2009	Dec 2023	Natural Gas
Maine Independence Station	Casco Bay Energy Co LLC	Veazie, ME	937 GWh	Apr 2000	Dec 2023	Natural Gas
MA Blackstone	Catalyze Blackstone 83 Federal Street Microgrid, LLC	Blackstone, MA	4 GWh	Jun 2022	Dec 2023	Solar
Curtis Hill Solar CSG	CCC Solar Holdings LLC	Charlton, MA	3 GWh	Sep 2016	Dec 2023	Solar
Depot Hill Solar CSG	CCC Solar Holdings LLC	Charlton, MA	3 GWh	Sep 2016	Dec 2023	Solar
Grafton Solar	CD US Solar MT 2 LLC	Grafton, MA	2 GWh	Sep 2013	Dec 2023	Solar
Franklin 2	CD US Solar MT 2 LLC	Franklin, MA	5 GWh	Nov 2013	Dec 2023	Solar
Franklin 1	CD US Solar MT 2 LLC	Wrentham, MA	4 GWh	Oct 2013	Dec 2023	Solar
True North	CD US Solar MT1 LLC	Salisbury, MA	7 GWh	Jul 2012	Dec 2023	Solar
Shaffer	CD US Solar MT3, LLC	Billerica, MA	6 GWh	Aug 2014	Dec 2023	Solar
CCSU Co-Gen-STBY Gen	Central Connecticut State University	New Britain, CT	88 MWh	Sep 1993	Dec 2023	Natural Gas
Gardners Falls	Central Rivers Power MA, LLC	Buckland, MA	18 GWh	Dec 1913	Dec 2023	Water
Putts Bridge	Central Rivers Power MA, LLC	Ludlow, MA	22 GWh	Dec 1917	Dec 2023	Water
Redbridge	Central Rivers Power MA, LLC	Wilbraham, MA	18 GWh	Dec 1925	Aug 2023	Water
Dwight	Central Rivers Power MA, LLC	Chicopee, MA	10 GWh	Dec 1919	Dec 2023	Water
Indian Orchard	Central Rivers Power MA, LLC	Indian Orchard, MA	11 GWh	Dec 1927	Dec 2023	Water
Hooksett	Central Rivers Power NH, LLC	Hooksett, NH	3 GWh	Jul 1927	Dec 2023	Water
Smith (NH)	Central Rivers Power NH, LLC	Berlin, NH	123 GWh	Jul 1948	Dec 2023	Water
Gorham	Central Rivers Power NH, LLC	Gorham, NH	12 GWh	Jul 1917	Dec 2023	Water
Garvins Falls	Central Rivers Power NH, LLC	Bow, NH	44 GWh	Jul 1925	Dec 2023	Water
Eastman Falls	Central Rivers Power NH, LLC	Franklin, NH	33 GWh	Jul 1937	Dec 2023	Water
Ayers Island	Central Rivers Power NH, LLC	Bristol, NH	54 GWh	Jul 1925	Dec 2023	Water
Amoskeag	Central Rivers Power NH, LLC	Manchester, NH	114 GWh	Jul 1922	Dec 2023	Water
Jackman	Central Rivers Power NH, LLC	Hillsborough, NH	13 GWh	Jan 1926	Dec 2023	Water
Canaan	Central Rivers Power NH, LLC	Canaan, VT	7 GWh	Jul 1927	Dec 2023	Water
Lawrence Hydroelectric Associates	Central Rivers Power US, LLC	Lawrence, MA	94 GWh	Jun 1981	Dec 2023	Water
Sheldon Springs Hydroelectric	Central Rivers Power US, LLC	Sheldon Springs, VT	75 GWh	Jun 1988	Dec 2023	Water
CES Agawam Tuckahoe Solar Hybrid	CES Agawam Tuckahoe Solar LLC	Agawam, MA	7 GWh	Nov 2021	Dec 2023	Solar
Charlemont A	Charlemont MA, LLC	Charlemont, MA	3 GWh	Aug 2021	Dec 2023	Solar
Charlton Solar I CSG	Charlton Solar I, LLC	Charlton, MA	5 GWh	Nov 2014	Dec 2023	Solar
Chittenden County Solar Partners	Chittenden County Solar Partners LLC	South Burlington, VT	3 GWh	Apr 2011	Dec 2023	Solar
Route 57 Solar	Citizens Enterprises Corporation	Agawam, MA	2 GWh	Feb 2013	Dec 2023	Solar
Twiss Street Solar	Citizens Enterprises Corporation	Westfield, MA	2 GWh	Dec 2014	Dec 2023	Solar
Chicopee River Solar	Citizens Enterprises Corporation	Springfield, MA	3 GWh	Dec 2014	Dec 2023	Solar
Chicopee Granby Road Solar	Citizens Enterprises Corporation	Chicopee, MA	2 GWh	Dec 2014	Dec 2023	Solar
Hunt Road Solar	Citizens Enterprises Corporation	Amesbury, MA	7 GWh	Nov 2016	Dec 2023	Solar
Tyngsborough Solar	Citizens Enterprises Corporation	Tyngsborough, MA	4 GWh	Dec 2016	Dec 2023	Solar
Norton Landfill Solar	Citizens Enterprises Corporation	Norton, MA	2 GWh	Dec 2016	Dec 2023	Solar
Citizens Agawam Landfill Solar	Citizens Enterprises Corporation	Agawam, MA	3 GWh	Mar 2017	Dec 2023	Solar
Whately Solar	Citizens Enterprises Corporation	Whately, MA	2 GWh	Feb 2013	Dec 2023	Solar
EBZ Solar	Citizens Enterprises Corporation	Shirley, MA	3 GWh	Dec 2012	Dec 2023	Solar
Oak Street Solar	Citizens Enterprises Corporation	Springfield, MA	5 GWh	Nov 2019	Dec 2023	Solar
Chicopee Solar	Citizens Enterprises Corporation	Chicopee, MA	5 GWh	Nov 2013	Dec 2023	Solar
Rehoboth Solar	Citizens Enterprises Corporation	Rehoboth, MA	3 GWh	Nov 2013	Dec 2023	Solar
Falmouth Landfill Solar	Citizens Enterprises Corporation	Falmouth, MA	5 GWh	Mar 2017	Dec 2023	Solar
Agawam Solar	Citizens Enterprises Corporation	Agawam, MA	2 GWh	Feb 2012	Dec 2023	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	900.7 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.0 TWh	85
#13	Duke Energy Carolinas	110.8 TWh	556
#17	Duke Energy Progress East	63.1 TWh	554
#51	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.1 TWh	20
#12	New York Independent System Operator	129.6 TWh	1,100
#1	PJM Interconnection, LLC	842.1 TWh	2,305
#31	South Carolina Public Service Authority	17.8 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	191.4 TWh	1,943
#9	Tennessee Valley Authority	157.5 TWh	170
#10	Florida Power & Light Co.	147.4 TWh	159
#12	New York Independent System Operator	129.6 TWh	1,100
#13	Duke Energy Carolinas	110.8 TWh	556
#15	ISO New England	103.6 TWh	1,487
#16	Bonneville Power Administration	79.9 TWh	158
#17	Duke Energy Progress East	63.1 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	58.9 TWh	45
#19	PacifiCorp East	52.9 TWh	204