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 AuthorityISO New England
States Connecticut Maine Massachusetts New Hampshire New York Rhode Island Vermont
Last Update Nov 2025
Annual Generation 105.5 TWh
Power Plants1,577
Utilities819
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 | 55.8% Nuclear | 26% Water | 5% Other Fuel | 4.4% Wind | 4% Solar | 1.5% Coal | 0.4%

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Daily Net Generation for ISO New England for the past 3 Years

List of All ISO New England Power Plants

Displaying Results 1 to 100 of 1,306
Plant NameUtilityLocationAnnual GenerationPlant DateLast UpdateFuel Types
Collins FacilityRelevate Power Management LLCWilbraham, MA7 GWhFeb 1985Dec 2023 Water
MoretownNextEra Renewable Fuels, LLCWaterbury, VT5 GWhNov 2008Dec 2023 Landfill Gas
Town of Otis Wind Energy ProjectTown of OtisOtis, MA3 GWhFeb 2018Dec 2023 Wind
158th Fighter Wing Solar Farm158th Fighter WingSouth Burlington, VT1 GWhAug 2011Dec 2023 Solar
Moretown Generating StationMoretown Hydroelectric LLCMoretown, VT3 GWhDec 1988Dec 2023 Water
East Brookfield Adams Road Solar LLC CSGEast Brookfield Adams Road Solar LLCEast Brookfield, MA7 GWhMay 2021Dec 2023 Solar
Canis Minor Solar FarmLSE Canis Minor LLCBarkhamsted, CT2 GWhNov 2016Dec 2023 Solar
S D Warren WestbrookRelevate Power Management LLCWestbrook, ME33 GWhDec 1902Dec 2023 Water
Robbins LumberRobbins Lumber IncSearsmont, ME97 MWhDec 1980Dec 2023 Distillate Fuel Oil
UB Fuel CellUB Fuel CellBridgeport, CT10 GWhMar 2015Dec 2023 Natural Gas
Signature Breads ChelseaJDC 65R Owner, LLCChelsea, MA2 MWhApr 2019Dec 2023 Distillate Fuel Oil
Mystic Generating StationConstellation Mystic Power LLCCharlestown, MA2 TWhMay 1969Mar 2024 Natural Gas
Norwich WWTPCity of Norwich - (CT)Norwich, CT1 MWhApr 2006Mar 2024 Distillate Fuel Oil
RutlandGreen Mountain Power CorpRutland City, VT84 MWhNov 1962Mar 2024 Distillate Fuel Oil
Lee Site 31 SolarNSTAR Electric CompanyLee, MA2 GWhJul 2018Apr 2024 Solar
Norton LLCGreenbacker Renewable Energy CorporationNorton, MA4 GWhAug 2020Apr 2024 Solar
Digital FairfieldBloom EnergyTrumbull, CT10 GWhMay 2018Jun 2024 Natural Gas
Somersworth Lower Great DamGreen Mountain Power CorpSomersworth, NH3 GWhJun 1985Jun 2024 Water
EHC West HopkintonGreen Mountain Power CorpWest Hopkinton, NH3 GWhJun 1985Jul 2024 Water
Redman North Community SolarAES Distributed EnergyBrockport, NY2 GWhJan 2022Aug 2024 Solar
Tenth StreetCity of Norwich - (CT)Norwich, CT3 GWhApr 1967Sep 2024 Water
Fife BrookBear Swamp Power Company LLCFlorida, MA29 GWhSep 1974Oct 2024 Water
VenturaVentura Drive Dartmouth Solar 1, LLCDartmouth, MA2 GWhMay 2022Oct 2024 Solar
Plainfield Renewable Energy LLCPlainfield Renewable Energy, LLCPlainfield, CT247 GWhNov 2013Oct 2024 Wood/Wood Waste Solids : 99.5% Other Biomass Liquids : 0.5%
Skyway Avenue Solar FarmREA Investments, LLCFrenchville, ME1 GWhFeb 2024Oct 2024 Solar
Blackhorse Farm Solar, LLC CSGAES Distributed EnergyWarren, RI6 GWhNov 2020Nov 2024 Solar
ME - EDFR - Phase I - BristolOverlook Solar Partners, LLCBristol, ME6 GWhNov 2023Nov 2024 Solar
Charlemont ACharlemont MA, LLCCharlemont, MA4 GWhAug 2021Nov 2024 Solar
Waters RiverCity of Peabody - (MA)Peabody, MA5 GWhNov 1971Nov 2024 Natural Gas : 78.8% Distillate Fuel Oil : 21.2%
BrooksideTerraform ArcadiaNorth Smithfield, RI2 GWhOct 2015Nov 2024 Solar
Acton Solar LandfillHeliovaas LLCActon, MA2 GWhNov 2013Nov 2024 Solar
East Brookfield Main Street Solar LLC CSAES Distributed EnergyEast Brookfield, MA2 GWhNov 2020Nov 2024 Solar
Howard Lane SolarNJR Clean Energy Ventures CorporationGlocester, RI4 GWhAug 2023Nov 2024 Solar
Wrightsville Hydro PlantWashington Electric Coop - (VT)Montpelier, VT2 GWhAug 1985Nov 2024 Water
Bulls BridgeFirstLight Power Resources Services LLCNew Milford, CT31 GWhDec 1902Dec 2024 Water
Cos CobConnecticut Jet Power LLCGreenwich, CT676 MWhAug 1969Dec 2024 Kerosene
Scotland DamFirstLight Power Resources Services LLCWindham, CT7 GWhDec 1936Dec 2024 Water
ShepaugFirstLight Power Resources Services LLCSouthbury, CT117 GWhDec 1954Dec 2024 Water
TaftvilleFirstLight Power Resources Services LLCTaftville, CT3 GWhDec 1905Dec 2024 Water
TunnelFirstLight Power Resources Services LLCPreston, CT8 GWhDec 1918Dec 2024 Water
Franklin DriveConnecticut Jet Power LLCTorrington, CT118 MWhOct 1968Dec 2024 Kerosene
MiddletownMiddletown Power LLCMiddletown, CT33 GWhSep 1958Dec 2024 Residual Fuel Oil : 60.6% Natural Gas : 39.3%
Torrington TerminalConnecticut Jet Power LLCTorrington, CT146 MWhOct 1967Dec 2024 Kerosene
Cadys FallsVillage of Morrisville - (VT)Morrisville, VT139 MWhJul 1914Dec 2024 Water
West Tisbury Generating FacilityVineyard Reliability LLCWest Tisbury, MA3 GWhDec 1974Dec 2024 Distillate Fuel Oil
Charles E MontyBrookfield White Pine Hydro LLCLewiston, ME141 GWhDec 1989Dec 2024 Water
Ellsworth Hydro StationBrookfield Black Bear Hydro, LLCEllsworth, ME22 GWhJun 1924Dec 2024 Water
Milford Hydro StationBrookfield Black Bear Hydro, LLCMilford, ME37 GWhJun 1941Dec 2024 Water
Stillwater Hydro StationBrookfield Black Bear Hydro, LLCStillwater, ME7 GWhDec 1912Dec 2024 Water
Bonny EagleBrookfield White Pine Hydro LLCHollis, ME33 GWhDec 1909Dec 2024 Water
Brunswick HydroBrookfield White Pine Hydro LLCBrunswick, ME88 GWhFeb 1982Dec 2024 Water
Cape Gas TurbineFPL Energy Cape LLCPortland, ME111 MWhDec 1969Dec 2024 Distillate Fuel Oil
Cataract HydroBrookfield White Pine Hydro LLCSaco, ME28 GWhDec 1936Dec 2024 Water
Deer RipsBrookfield White Pine Hydro LLCAuburn, ME58 GWhDec 1902Dec 2024 Water
Gulf IslandBrookfield White Pine Hydro LLCLewiston, ME136 GWhDec 1925Dec 2024 Water
Harris HydroBrookfield White Pine Hydro LLCWest Forks, ME170 GWhDec 1953Dec 2024 Water
HiramBrookfield White Pine Hydro LLCHiram, ME40 GWhDec 1916Dec 2024 Water
Brattleboro (Windham Landfill)Greenbacker Renewable Energy CorporationBrattleboro, VT7 GWhJul 2018Dec 2024 Solar
ShermanGreat River Hydro, LLCRowe, MA27 GWhNov 1926Dec 2024 Water
Weston HydroBrookfield White Pine Hydro LLCSkowhegan, ME57 GWhDec 1919Dec 2024 Water
Williams HydroBrookfield White Pine Hydro LLCSolon, ME80 GWhDec 1938Dec 2024 Water
Wyman HydroBrookfield White Pine Hydro LLCBingham, ME337 GWhDec 1929Dec 2024 Water
Exelon Framingham LLCConstellation Power, IncFramingham, MA273 MWhAug 1969Dec 2024 Distillate Fuel Oil
Exelon Medway LLCConstellation Power, IncMedway, MA2 GWhJun 1970Dec 2024 Distillate Fuel Oil
Deerfield 4Great River Hydro, LLCBuckland, MA20 GWhJul 1912Dec 2024 Water
Oak Bluffs Diesel Generating FacilityVineyard Reliability LLCOak Bluffs, MA2 GWhDec 1968Dec 2024 Distillate Fuel Oil
BoatlockCity of Holyoke Gas and Electric Dept.Holyoke, MA19 GWhDec 1920Dec 2024 Water
ChemicalCity of Holyoke Gas and Electric Dept.Holyoke, MA5 GWhDec 1934Dec 2024 Water
Hadley FallsCity of Holyoke Gas and Electric Dept.Holyoke, MA151 GWhDec 1951Dec 2024 Water
Riverside HolyokeCity of Holyoke Gas and Electric Dept.Holyoke, MA38 GWhDec 1905Dec 2024 Water
Deerfield 5Great River Hydro, LLCFlorida, MA42 GWhSep 1974Dec 2024 Water
CabotFirstLight Power Resources, Inc. - MAMontague, MA304 GWhDec 1914Dec 2024 Water
Cobble MountainCity of Holyoke Gas and Electric Dept.Granville, MA8 GWhDec 1929Dec 2024 Water
Gardners FallsCentral Rivers Power MA, LLCBuckland, MA11 GWhDec 1913Dec 2024 Water
Putts BridgeCentral Rivers Power MA, LLCLudlow, MA16 GWhDec 1917Dec 2024 Water
Potter Station 2Town of Braintree - (MA)Braintree, MA23 GWhJun 1963Dec 2024 Natural Gas : 93.9% Distillate Fuel Oil : 6.1%
High Street StationTown of Ipswich - (MA)Ipswich, MA197 MWhMay 1937Dec 2024 Natural Gas : 91.9% Distillate Fuel Oil : 8.1%
Cleary Flood HybridCity of TauntonTaunton, MA133 GWhMay 1966Dec 2024 Natural Gas : 99.8%
ComerfordGreat River Hydro, LLCMonroe, NH400 GWhAug 1930Dec 2024 Water
S C MooreGreat River Hydro, LLCLittleton, NH341 GWhDec 1956Dec 2024 Water
White LakeGranite Shore PowerTamworth, NH484 MWhJun 1968Dec 2024 Jet Fuel
Smith (VT)Green Mountain Power CorpBradford, VT2 GWhNov 1982Dec 2024 Water
CavendishGreen Mountain Power CorpCavendish, VT830 MWhJan 1907Dec 2024 Water
Clark FallsGreen Mountain Power CorpMilton, VT17 GWhJan 1937Dec 2024 Water
Fairfax FallsGreen Mountain Power CorpFairfax, VT20 GWhJan 1919Dec 2024 Water
GlenGreen Mountain Power CorpRutland, VT6 GWhJul 1920Dec 2024 Water
Lower MiddleburyGreen Mountain Power CorpMiddlebury Lower, VT4 GWhJul 1917Dec 2024 Water
MiltonGreen Mountain Power CorpMilton, VT44 GWhJan 1929Dec 2024 Water
PetersonGreen Mountain Power CorpMilton, VT31 GWhJan 1948Dec 2024 Water
PittsfordGreen Mountain Power CorpPittsford, VT8 GWhJan 1914Dec 2024 Water
SalisburyGreen Mountain Power CorpSalisbury, VT2 GWhJan 1917Dec 2024 Water
Silver Lake (VT)Green Mountain Power CorpSalisbury, VT5 GWhJan 1917Dec 2024 Water
WeybridgeGreen Mountain Power CorpWeybridge, VT14 GWhJan 1951Dec 2024 Water
NewportGreat Bay Hydro CorpNewport, VT21 GWhDec 1935Dec 2024 Water
Deerfield 3Great River Hydro, LLCBuckland, MA25 GWhJul 1912Dec 2024 Water
Colchester 16Green Mountain Power CorpColchester, VT279 MWhSep 1965Dec 2024 Distillate Fuel Oil
Marshfield 6Green Mountain Power CorpMarshfield, VT8 GWhDec 1926Dec 2024 Water
Middlesex 2Green Mountain Power CorpMoretown, VT10 GWhDec 1927Dec 2024 Water
West Danville 15Green Mountain Power CorpDanville, VT3 GWhDec 1916Dec 2024 Water
Bellows FallsGreat River Hydro, LLCBellow Falls, VT264 GWhFeb 1928Dec 2024 Water

Surrounding Balancing Authorities

Balancing Authorities with Similar Net Generation

RankBalancing AuthorityAnnual Net Generation# Power Plants
#7California Independent System Operator188.1 TWh2,075
#9Tennessee Valley Authority161.5 TWh204
#10Florida Power & Light Co.148.6 TWh187
#12New York Independent System Operator131.6 TWh1,211
#13Duke Energy Carolinas112.7 TWh565
#15ISO New England105.5 TWh1,577
#16Bonneville Power Administration80.5 TWh163
#17Duke Energy Progress East64.2 TWh559
#18PacifiCorp East61.0 TWh216
#19Salt River Project Agricultural Improvement and Power District60.2 TWh48