Directory of Power Plants in Massachusetts
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| 0 Hammond St CSG | 0HAM WHAM8 Solar, LLC | Carver, MA | ISO New England (ISNE) | 14.3 GWh | Sep 2021 | Dec 2025 | Solar |
| Equinix - Billerica | Bloom Energy | Billerica, MA | ISO New England (ISNE) | 14.5 GWh | Aug 2021 | Dec 2025 | Natural Gas |
| One Patriot | Bloom Energy | Foxborough, MA | ISO New England (ISNE) | 16.9 GWh | Nov 2019 | Dec 2025 | Natural Gas |
| Barrett PV | MN8 Energy LLC | Oxford, MA | ISO New England (ISNE) | 17.2 GWh | Oct 2016 | Dec 2025 | Solar |
| Medway Grid | Medway Grid LLC | Medway, MA | ISO New England (ISNE) | 18.4 GWh | - | Jun 2026 | Electricity used for energy storage |
| West Groton CHP | Hollingsworth & Vose Co West Groton | Groton, MA | ISO New England (ISNE) | 20.9 GWh | Nov 2015 | Dec 2025 | Natural Gas |
| Deerfield 4 | Great River Hydro, LLC | Buckland, MA | ISO New England (ISNE) | 21.5 GWh | Jul 1912 | Dec 2025 | Water |
| Riverside Holyoke | City of Holyoke Gas and Elec Dept - (MA) | Holyoke, MA | ISO New England (ISNE) | 22.5 GWh | Dec 1905 | Dec 2025 | Water |
| SJA Solar LLC-Solterra Monastery CSG | SJA Solar, LLC | Spencer, MA | ISO New England (ISNE) | 23.6 GWh | Nov 2016 | Dec 2025 | Solar |
| Deerfield 3 | Great River Hydro, LLC | Buckland, MA | ISO New England (ISNE) | 26.5 GWh | Jul 1912 | Dec 2025 | Water |
| Berkshire Wind Power Project | Massachusetts Mun Wholes Electric Co | Lanesboro, MA | ISO New England (ISNE) | 27.3 GWh | Apr 2011 | Aug 2026 | Wind |
| CoreSite - Somerville | Bloom Energy | Somerville, MA | ISO New England (ISNE) | 27.8 GWh | Aug 2020 | Dec 2025 | Natural Gas |
| Sherman | Great River Hydro, LLC | Rowe, MA | ISO New England (ISNE) | 27.8 GWh | Nov 1926 | Dec 2025 | Water |
| Norton Powerhouse 2 | Norton Powerhouse 2 | Worcester, MA | ISO New England (ISNE) | 28.7 GWh | Oct 2022 | Dec 2025 | Natural Gas |
| Deerfield 2 | Great River Hydro, LLC | Conway, MA | ISO New England (ISNE) | 29.4 GWh | Jul 1913 | Dec 2025 | Water |
| Fitchburg Gas Recovery | WM Renewable Energy LLC | Westminster, MA | ISO New England (ISNE) | 31.7 GWh | Sep 2007 | Dec 2025 | Landfill Gas |
| Deer Island Treatment Plant | Massachusetts Wtr Rauth-Deer I | Winthrop, MA | ISO New England (ISNE) | 31.8 GWh | Jul 1995 | Aug 2026 | Other Biomass Gas : 81.6% Distillate Fuel Oil : 13.8% Wind : 2.8% Solar : 1.8% |
| Potter Station 2 | Town of Braintree - (MA) | Braintree, MA | ISO New England (ISNE) | 41.0 GWh | Jun 1963 | Dec 2025 | Natural Gas : 61.2% Distillate Fuel Oil : 38.8% |
| Erving Paper Mills | Erving Paper Mills Inc | Erving, MA | ISO New England (ISNE) | 42.6 GWh | Nov 2013 | Aug 2026 | Natural Gas : 98.1% Distillate Fuel Oil : 1.9% |
| Pittsfield Generating LP | Pittsfield Generating Company, LP | Pittsfield, MA | ISO New England (ISNE) | 43.7 GWh | Jun 1990 | Aug 2026 | Natural Gas : 90.2% Distillate Fuel Oil : 9.8% |
| Deerfield 5 | Great River Hydro, LLC | Florida, MA | ISO New England (ISNE) | 44.4 GWh | Sep 1974 | Dec 2025 | Water |
| Cleary Flood Hybrid | City of Taunton - (MA) | Taunton, MA | ISO New England (ISNE) | 54.2 GWh | May 1966 | Dec 2025 | Natural Gas : 94.0% Distillate Fuel Oil : 6.0% |
| Lawrence Hydroelectric Associates | Central Rivers Power US, LLC | Lawrence, MA | ISO New England (ISNE) | 58.9 GWh | Jun 1981 | Dec 2025 | Water |
| Gillette SBMC | The Gillette Company | Boston, MA | ISO New England (ISNE) | 59.5 GWh | Jan 1971 | Aug 2026 | Natural Gas |
| Boott Hydropower | Boott Hydro, LLC - Hybrid | Lowell, MA | ISO New England (ISNE) | 60.8 GWh | Sep 1985 | Dec 2025 | Water |
| Univ of Massachusetts Medical Center | University of Massachusetts Medical | Worcester, MA | ISO New England (ISNE) | 63.3 GWh | Mar 1974 | Dec 2025 | Natural Gas : 99.3% Distillate Fuel Oil : 0.6% |
| New England Wind LLC | Avangrid Power LLC | Florida, MA | ISO New England (ISNE) | 76.2 GWh | Nov 2012 | Aug 2026 | Wind |
| NE Renewable Fitchburg, LLC | NE Renewable Fitchburg, LLC | Westminster, MA | ISO New England (ISNE) | 78.7 GWh | Jul 1992 | Dec 2025 | Wood/Wood Waste Solids : 98.7% Natural Gas : 1.3% |
| Central Heating Plant | University of Massachusetts Amherst | Amherst, MA | ISO New England (ISNE) | 79.6 GWh | Sep 2007 | Dec 2025 | Natural Gas : 96.3% Distillate Fuel Oil : 3.7% |
| Dartmouth Power Associates LP | Dartmouth Energy Center | Dartmouth, MA | ISO New England (ISNE) | 88.9 GWh | Feb 1992 | Dec 2025 | Natural Gas : 96.7% Distillate Fuel Oil : 3.3% |
| Stony Brook | Massachusetts Mun Wholes Electric Co | Ludlow, MA | ISO New England (ISNE) | 123.8 GWh | Oct 1981 | Aug 2026 | Distillate Fuel Oil : 79.0% Natural Gas : 21.0% |
| Hadley Falls | City of Holyoke Gas and Elec Dept - (MA) | Holyoke, MA | ISO New England (ISNE) | 137.3 GWh | Dec 1951 | Dec 2025 | Water |
| Wheelabrator Saugus | Wheelabrator Environmental Systems | Saugus, MA | ISO New England (ISNE) | 180.9 GWh | Jul 1985 | Aug 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Mass Inst Tech Cntrl Utilities/Cogen Plt | Massachusetts Inst of Tech | Cambridge, MA | ISO New England (ISNE) | 209.4 GWh | May 1995 | Dec 2025 | Natural Gas |
| Exelon West Medway II LLC | Constellation Power, Inc | Medway, MA | ISO New England (ISNE) | 228.1 GWh | Feb 2019 | Aug 2026 | Natural Gas : 94.6% Kerosene : 5.4% |
| Cabot | FirstLight Power Resources, Inc. - MA | Montague, MA | ISO New England (ISNE) | 239.5 GWh | Dec 1914 | Dec 2025 | Water |
| Wheelabrator North Andover | Wheelabrator Environmental Systems | North Andover, MA | ISO New England (ISNE) | 245.8 GWh | Apr 1985 | Aug 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Milford Power LP | Milford Power LLC | Milford, MA | ISO New England (ISNE) | 253.3 GWh | Feb 1993 | Dec 2025 | Natural Gas |
| Dighton Power Plant | Dighton Power, LLC | Dighton, MA | ISO New England (ISNE) | 275.5 GWh | Apr 1999 | Dec 2025 | Natural Gas |
| Wheelabrator Millbury Facility | Wheelabrator Environmental Systems | Millbury, MA | ISO New England (ISNE) | 288.1 GWh | Aug 1987 | Aug 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Covanta Haverhill | Ogden Projects Inc-Haverhill | Haverhill, MA | ISO New England (ISNE) | 292.5 GWh | Apr 1989 | Aug 2026 | Non-biogenic Municipal Solid Waste : 54.8% Biogenic Municipal Solid Waste : 44.8% |
| Medical Area Total Energy Plant | MATEP LLC | Boston, MA | ISO New England (ISNE) | 313.7 GWh | Dec 1979 | Dec 2025 | Natural Gas : 99.0% Distillate Fuel Oil : 1.0% |
| Bellingham Cogeneration Facility | Northeast Energy Associates LP | Bellingham, MA | ISO New England (ISNE) | 318.2 GWh | Aug 1991 | Dec 2025 | Natural Gas : 95.7% Distillate Fuel Oil : 4.3% |
| Masspower | Masspower | Indian Orchard, MA | ISO New England (ISNE) | 441.7 GWh | Jun 1993 | Dec 2025 | Natural Gas |
| Canal | Canal Generating LLC | Sandwich, MA | ISO New England (ISNE) | 447.0 GWh | May 1968 | Aug 2026 | Residual Fuel Oil : 58.2% Natural Gas : 31.0% Distillate Fuel Oil : 10.8% |
| SEMASS Resource Recovery | SEMASS Partnership | West Wareham, MA | ISO New England (ISNE) | 537.3 GWh | Jun 1988 | Aug 2026 | Non-biogenic Municipal Solid Waste : 53.8% Biogenic Municipal Solid Waste : 44.0% Natural Gas : 2.0% |
| Berkshire Power | Berkshire Power Co LLC | Agawam, MA | ISO New England (ISNE) | 809.5 GWh | Aug 1999 | Dec 2025 | Natural Gas |
| Vineyard Wind 1 | Vineyard Wind 1 LLC | Edgartown, MA | ISO New England (ISNE) | 866.5 GWh | - | Aug 2026 | Wind |
| Millennium Power | Millennium Power Company, LLC | Charlton, MA | ISO New England (ISNE) | 908.0 GWh | Mar 2001 | Aug 2026 | Natural Gas |
| Salem Harbor Power Development LP | Salem Harbor Power Development LP | Salem, MA | ISO New England (ISNE) | 1.2 TWh | Apr 2018 | Aug 2026 | Natural Gas |
| Kendall Square Station | Kendall Green Energy, LLC | Cambridge, MA | ISO New England (ISNE) | 1.4 TWh | May 1949 | Aug 2026 | Natural Gas : 97.3% Distillate Fuel Oil : 2.7% |
| Fore River Generating Station | Calpine Fore River Energy Center, LLC | North Weymouth, MA | ISO New England (ISNE) | 2.5 TWh | Jul 2003 | Aug 2026 | Natural Gas : 91.7% Distillate Fuel Oil : 8.3% |
| ANP Blackstone Energy Project | ANP Blackstone Energy Company LLC | Blackstone, MA | ISO New England (ISNE) | 2.5 TWh | May 2001 | Aug 2026 | Natural Gas |
| ANP Bellingham Energy Project | Bellingham Power Generation LLC | Bellingham, MA | ISO New England (ISNE) | 2.7 TWh | Oct 2002 | Aug 2026 | Natural Gas |
Browse Power Plants By Massachusetts Counties
Figures are based on August 2026 generation numbers.| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Berkshire County, MA | # 13 | 46 | 85.8 GWh |
| Franklin County, MA | # 12 | 33 | 172.4 GWh |
| Hampshire County, MA | # 11 | 39 | 226.3 GWh |
| Suffolk County, MA | # 10 | 14 | 427.6 GWh |
| Barnstable County, MA | # 9 | 25 | 531.6 GWh |
| Bristol County, MA | # 8 | 75 | 645.7 GWh |
| Plymouth County, MA | # 7 | 86 | 797.7 GWh |
| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Dukes County, MA | # 6 | 7 | 879.6 GWh |
| Hampden County, MA | # 5 | 90 | 1.9 TWh |
| Middlesex County, MA | # 4 | 70 | 1.9 TWh |
| Essex County, MA | # 3 | 41 | 2.1 TWh |
| Worcester County, MA | # 2 | 200 | 4.9 TWh |
| Norfolk County, MA | # 1 | 40 | 5.9 TWh |