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 AuthorityISO New England
States Connecticut Maine Massachusetts New Hampshire New York Rhode Island Vermont
Last Update Jul 2026
Annual Generation 111.1 TWh
Power Plants1,629
Utilities833
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

List of All ISO New England Power Plants

Displaying Results 1,201 to 1,300 of 1,367
Plant NameUtilityLocationAnnual GenerationPlant DateLast UpdateFuel Types
W K SandersVillage of Morrisville - (VT)Hyde Park, VT716 MWhJun 1983Nov 2025 Water
Ottauquechee HydroGreen Mountain Power CorpN. Hartland, VT3 GWhMar 1983Dec 2025 Water
Smith (VT)Green Mountain Power CorpBradford, VT2 GWhNov 1982Dec 2025 Water
Stevens Mills DamEagle Creek Renewable Energy, LLCFranklin, NH4 GWhMay 1982Dec 2025 Water
Brunswick HydroBrookfield White Pine Hydro LLCBrunswick, ME70 GWhFeb 1982Dec 2025 Water
Texon Hydroelectric ProjectHitchcock Hydro, LLCRussell, MA4 GWhDec 1981Dec 2025 Water
International Paper Riley HydroEagle Creek Renewable Energy, LLCJay, ME20 GWhNov 1981Dec 2025 Water
Stony BrookMassachusetts Mun Wholes Electric CoLudlow, MA164 GWhOct 1981May 2026 Distillate Fuel Oil : 61.3% Natural Gas : 38.7%
China Mill HydroNew Hampshire Hydro AssociatesAllenstown, NH3 GWhJun 1981Dec 2025 Water
Lawrence Hydroelectric AssociatesCentral Rivers Power US, LLCLawrence, MA59 GWhJun 1981Dec 2025 Water
Thundermist HydroCity of Woonsocket - (RI)Providence, RI3 GWhMay 1981Jul 2025 Water
Blackstone/TupperwareBlackstone Hydro Inc.North Smithfield, RI2 GWhDec 1980May 2026 Water
Medical Area Total Energy PlantMATEP LLCBoston, MA318 GWhDec 1979Dec 2024 Natural Gas : 98.3% Distillate Fuel Oil : 1.7%
Middlebury CollegeMiddlebury College BiomassMiddlebury, VT2 GWhDec 1979May 2026 Wood/Wood Waste Solids : 60.7% Natural Gas : 39.3%
M Street JetMassachusetts Bay Trans AuthBoston, MA294 MWhApr 1979Dec 2025 Kerosene
Hampton FacilityFoss Manufacturing Company LLCHampton, NH28 GWhSep 1978May 2026 Natural Gas
Front StreetCity of Chicopee - (MA)Chicopee, MA1 GWhDec 1977Dec 2025 Distillate Fuel Oil
Somerset PlantSappi Fine Paper North America-SomersetSkowhegan, ME568 GWhDec 1975May 2026 Black Liquor : 45.9% Wood/Wood Waste Solids : 32.4% Natural Gas : 13.1% Tire-derived Fuels : 4.1% Residual Fuel Oil : 3.7% Sludge Waste : 0.5%
MillstoneDominion Energy Nuclear Conn IncWaterford, CT17 TWhNov 1975May 2026 Nuclear
Wilkins StationTown of Marblehead - (MA)Marblehead, MA32 MWhOct 1975Dec 2025 Distillate Fuel Oil
New Haven SteamGeneration Bridge II Connecticut, LLCNew Haven, CT167 GWhJun 1975Jan 2026 Residual Fuel Oil : 45.1% Natural Gas : 40.3% Distillate Fuel Oil : 12.2% Kerosene : 2.5%
West Tisbury Generating FacilityVineyard Reliability LLCWest Tisbury, MA5 GWhDec 1974Sep 2025 Distillate Fuel Oil
Deerfield 5Great River Hydro, LLCFlorida, MA44 GWhSep 1974Dec 2025 Water
Rhode Island HospitalRhode Island HospitalProvidence, RI53 GWhSep 1974May 2026 Natural Gas : 87.3% Residual Fuel Oil : 12.7%
NewingtonGranite Shore PowerNewington, NH157 GWhMay 1974Apr 2026 Residual Fuel Oil : 64.1% Natural Gas : 34.5% Distillate Fuel Oil : 1.4%
Framingham State University PlantFramingham State UniversityFramingham, MA38 MWhMay 1974May 2026 Solar : 63.2% Distillate Fuel Oil : 36.8%
Univ of Massachusetts Medical CenterUniversity of Massachusetts MedicalWorcester, MA63 GWhMar 1974Dec 2025 Natural Gas : 99.3% Distillate Fuel Oil : 0.6%
Berlin 5Green Mountain Power CorpBerlin, VT2 GWhMay 1972May 2026 Kerosene
UMass BostonMSS Energy Holdings, LLC (d.b.a. Calibrant Energy)Dorchester, MA1 GWhDec 1971Dec 2025 Solar
Waters RiverCity of Peabody - (MA)Peabody, MA6 GWhNov 1971Dec 2025 Natural Gas : 71.3% Distillate Fuel Oil : 28.7%
Burlington GTCity of Burlington Electric - (VT)Burlington, VT684 MWhAug 1971Dec 2025 Distillate Fuel Oil
Gillette SBMCThe Gillette CompanyBoston, MA54 GWhJan 1971May 2026 Natural Gas
Exelon Medway LLCConstellation Power, IncMedway, MA4 GWhJun 1970Dec 2025 Distillate Fuel Oil
Cape Gas TurbineFPL Energy Cape LLCPortland, ME752 MWhDec 1969Dec 2025 Distillate Fuel Oil
Dartmouth College Heating PlantDartmouth CollegeHanover, NH11 GWhDec 1969May 2026 Residual Fuel Oil
ShrewsburyTown of Shrewsbury - (MA)Shrewsbury, MA2 GWhOct 1969Dec 2025 Distillate Fuel Oil
Cos CobConnecticut Jet Power LLCGreenwich, CT2 GWhAug 1969Dec 2025 Kerosene
Exelon Framingham LLCConstellation Power, IncFramingham, MA1 GWhAug 1969Dec 2025 Distillate Fuel Oil
Lost NationGranite Shore PowerGroveton, NH422 MWhAug 1969Dec 2024 Distillate Fuel Oil
Oak Bluffs Diesel Generating FacilityVineyard Reliability LLCOak Bluffs, MA3 GWhDec 1968Sep 2025 Distillate Fuel Oil
Cosgrove Intake and Power StationMassachusetts Water Res AuthClinton, MA646 MWhDec 1968Jan 2025 Water
Franklin DriveConnecticut Jet Power LLCTorrington, CT294 MWhOct 1968Dec 2025 Kerosene
White LakeGranite Shore PowerTamworth, NH484 MWhJun 1968Dec 2024 Jet Fuel
CanalCanal Generating LLCSandwich, MA546 GWhMay 1968May 2026 Residual Fuel Oil : 55.3% Natural Gas : 34.6% Distillate Fuel Oil : 10.1%
BranfordConnecticut Jet Power LLCBranford, CT288 MWhOct 1967Dec 2025 Kerosene
TorringtonConnecticut Jet Power LLCTorrington, CT277 MWhOct 1967Dec 2025 Kerosene
Tenth StreetCity of Norwich - (CT)Norwich, CT2 GWhApr 1967Dec 2025 Water
Cleary Flood HybridCity of Taunton - (MA)Taunton, MA54 GWhMay 1966Dec 2025 Natural Gas : 94.0% Distillate Fuel Oil : 6.0%
Colchester 16Green Mountain Power CorpColchester, VT310 MWhSep 1965Dec 2025 Distillate Fuel Oil
Bucksport Generation LLCBucksport Generation LLCBucksport, ME29 GWhJun 1965May 2026 Natural Gas : 57.8% Distillate Fuel Oil : 42.2%
Potter Station 2Town of Braintree - (MA)Braintree, MA41 GWhJun 1963Dec 2025 Natural Gas : 61.2% Distillate Fuel Oil : 38.8%
Bridgeport StationGeneration Bridge II Connecticut, LLCBridgeport, CT3 TWhJul 1961May 2026 Natural Gas : 84.6% Distillate Fuel Oil : 15.4%
AscutneyGreen Mountain Power CorpWeatherfield, VT437 MWhJul 1961May 2026 Distillate Fuel Oil
MerrimackGranite Shore PowerBow, NH116 GWhNov 1960May 2026 Bituminous Coal : 97.6% Jet Fuel : 2.3%
MiddletownMiddletown Power LLCMiddletown, CT33 GWhSep 1958Dec 2024 Residual Fuel Oil : 60.6% Natural Gas : 39.3%
Central Power PlantState of Rhode IslandCranston, RI19 GWhJul 1958Mar 2026 Natural Gas : 97.5% Distillate Fuel Oil : 2.5%
William F Wyman HybridFPL Energy Wyman LLCYarmouth, ME339 GWhDec 1956May 2026 Residual Fuel Oil : 99.6%
S C MooreGreat River Hydro, LLCLittleton, NH255 GWhDec 1956Dec 2025 Water
ShepaugFirstLight Power Resources Services LLCSouthbury, CT93 GWhDec 1954Dec 2025 Water
Montville StationMontville Power LLCUncasville, CT133 GWhDec 1953Dec 2025 Residual Fuel Oil : 74.2% Natural Gas : 24.9% Distillate Fuel Oil : 0.9%
Harris HydroBrookfield White Pine Hydro LLCWest Forks, ME151 GWhDec 1953Dec 2025 Water
Waterbury 22Green Mountain Power CorpWaterbury, VT11 GWhMay 1953Dec 2025 Water
SchillerGranite Shore PowerPortsmouth, NH888 MWhSep 1952May 2026 Jet Fuel
Hadley FallsCity of Holyoke Gas and Elec Dept - (MA)Holyoke, MA137 GWhDec 1951Dec 2025 Water
Cherry StreetTown of Hudson - (MA)Hudson, MA320 MWhApr 1951Dec 2025 Distillate Fuel Oil : 58.5% Natural Gas : 41.5%
Oakdale Power StationMassachusetts Water Res AuthWest Boylston, MA1 GWhApr 1951Dec 2025 Water
WeybridgeGreen Mountain Power CorpWeybridge, VT10 GWhJan 1951Dec 2025 Water
WilderGreat River Hydro, LLCHartford, VT134 GWhOct 1950Dec 2025 Water
Anson Abenaki HydrosEagle Creek Renewable Energy, LLCMadison, ME101 GWhDec 1949Dec 2025 Water
Kendall Square StationKendall Green Energy, LLCCambridge, MA1 TWhMay 1949May 2026 Natural Gas : 97.3% Distillate Fuel Oil : 2.7%
Smith (NH)Central Rivers Power NH, LLCBerlin, NH87 GWhJul 1948Dec 2025 Water
PetersonGreen Mountain Power CorpMilton, VT25 GWhJan 1948Dec 2025 Water
SkeltonBrookfield White Pine Hydro LLCDayton, ME77 GWhDec 1947Dec 2025 Water
General Electric Aircraft EnginesGeneral Electric Aircraft EnginesLynn, MA2 GWhDec 1947May 2026 Solar
Pfizer Groton PlantPfizer IncGroton, CT75 GWhDec 1947May 2026 Natural Gas : 88.5% Distillate Fuel Oil : 11.5%
Milford Hydro StationBrookfield Black Bear Hydro, LLCMilford, ME36 GWhJun 1941Dec 2025 Water
Gilman MillAmpersand Gilman Hydro LPGilman, VT2 GWhDec 1940Dec 2025 Water
Williams HydroBrookfield White Pine Hydro LLCSolon, ME64 GWhDec 1938Dec 2025 Water
Eastman FallsCentral Rivers Power NH, LLCFranklin, NH22 GWhJul 1937Dec 2025 Water
High Street StationTown of Ipswich - (MA)Ipswich, MA153 MWhMay 1937Dec 2025 Natural Gas : 92.3% Distillate Fuel Oil : 7.7%
Clark FallsGreen Mountain Power CorpMilton, VT14 GWhJan 1937Dec 2025 Water
Scotland DamFirstLight Power Resources Services LLCWindham, CT4 GWhDec 1936Dec 2025 Water
Cataract HydroBrookfield White Pine Hydro LLCSaco, ME23 GWhDec 1936Dec 2025 Water
NewportGreat Bay Hydro CorpNewport, VT13 GWhDec 1935Dec 2025 Water
Messalonskee 5Messalonskee Stream Hydro LLCWaterville, ME4 GWhDec 1934Dec 2025 Water
ChemicalCity of Holyoke Gas and Elec Dept - (MA)Holyoke, MA5 GWhDec 1934Dec 2025 Water
West CharlestonBarton Village, IncWest Charleston, VT6 GWhJun 1931Jul 2025 Water
McindoesGreat River Hydro, LLCBarnet, VT39 GWhDec 1930Dec 2025 Water
ComerfordGreat River Hydro, LLCMonroe, NH297 GWhAug 1930Dec 2025 Water
Wyman HydroBrookfield White Pine Hydro LLCBingham, ME295 GWhDec 1929Dec 2025 Water
Cobble MountainCity of Holyoke Gas and Elec Dept - (MA)Granville, MA7 GWhDec 1929Dec 2025 Water
MiltonGreen Mountain Power CorpMilton, VT34 GWhJan 1929Dec 2025 Water
Bellows FallsGreat River Hydro, LLCBellow Falls, VT194 GWhFeb 1928Dec 2025 Water
Middlesex 2Green Mountain Power CorpMoretown, VT6 GWhDec 1927Dec 2025 Water
Indian OrchardCentral Rivers Power MA, LLCIndian Orchard, MA3 GWhDec 1927Dec 2025 Water
Gorge 18Green Mountain Power CorpSouth Burlington, VT15 GWhDec 1927Dec 2025 Water
HooksettCentral Rivers Power NH, LLCHooksett, NH6 GWhJul 1927Dec 2025 Water
CanaanCentral Rivers Power NH, LLCCanaan, VT6 GWhJul 1927Dec 2025 Water
Marshfield 6Green Mountain Power CorpMarshfield, VT4 GWhDec 1926Dec 2025 Water
ShermanGreat River Hydro, LLCRowe, MA28 GWhNov 1926Dec 2025 Water

Surrounding Balancing Authorities

Balancing Authorities with Similar Net Generation

RankBalancing AuthorityAnnual Net Generation# Power Plants
#7California Independent System Operator169.4 TWh2,135
#9Tennessee Valley Authority163.4 TWh207
#10Florida Power & Light Co.152.2 TWh187
#12New York Independent System Operator134.3 TWh1,299
#13Duke Energy Carolinas112.6 TWh577
#15ISO New England111.1 TWh1,629
#16Bonneville Power Administration91.6 TWh167
#17Duke Energy Progress East64.5 TWh565
#18PacifiCorp East60.9 TWh222
#19Salt River Project Agricultural Improvement and Power District60.3 TWh49