Directory of Power Plants in Massachusetts
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Stony Brook | Massachusetts Mun Wholes Electric Co | Ludlow, MA | ISO New England (ISNE) | 125.4 GWh | Oct 1981 | Sep 2025 | Natural Gas : 74.6% Distillate Fuel Oil : 25.4% |
| General Electric Aircraft Engines | General Electric Aircraft Engines | Lynn, MA | ISO New England (ISNE) | 2.5 GWh | Dec 1947 | Sep 2025 | Solar |
| Pepperell Hydro Power Plant | Eagle Creek Renewable Energy, LLC | Pepperell, MA | ISO New England (ISNE) | 3.7 GWh | Dec 1919 | Sep 2025 | Water |
| Deer Island Treatment Plant | Massachusetts Wtr Rauth-Deer I | Winthrop, MA | ISO New England (ISNE) | 33.4 GWh | Jul 1995 | Sep 2025 | Other Biomass Gas : 83.9% Distillate Fuel Oil : 10.8% Wind : 2.6% Solar : 1.9% Water : 0.9% |
| Pittsfield Generating LP | Pittsfield Generating Company, LP | Pittsfield, MA | ISO New England (ISNE) | 123.3 GWh | Jun 1990 | Sep 2025 | Natural Gas : 98.6% Distillate Fuel Oil : 1.4% |
| SEMASS Resource Recovery | SEMASS Partnership | West Wareham, MA | ISO New England (ISNE) | 569.5 GWh | Jun 1988 | Sep 2025 | Non-biogenic Municipal Solid Waste : 54.1% Biogenic Municipal Solid Waste : 44.3% Natural Gas : 1.5% |
| Covanta Haverhill | Ogden Projects Inc-Haverhill | Haverhill, MA | ISO New England (ISNE) | 226.4 GWh | Apr 1989 | Sep 2025 | Non-biogenic Municipal Solid Waste : 52.2% Biogenic Municipal Solid Waste : 42.7% Distillate Fuel Oil : 5.1% |
| Wheelabrator North Andover | Wheelabrator Environmental Systems | North Andover, MA | ISO New England (ISNE) | 233.1 GWh | Apr 1985 | Sep 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator Millbury Facility | Wheelabrator Environmental Systems | Millbury, MA | ISO New England (ISNE) | 317.5 GWh | Aug 1987 | Sep 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator Saugus | Wheelabrator Environmental Systems | Saugus, MA | ISO New England (ISNE) | 226.1 GWh | Jul 1985 | Sep 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Gillette SBMC | The Gillette Company | Boston, MA | ISO New England (ISNE) | 54.9 GWh | Jan 1971 | Sep 2025 | Natural Gas |
| Erving Paper Mills | Erving Paper Mills Inc | Erving, MA | ISO New England (ISNE) | 41.7 GWh | Nov 2013 | Sep 2025 | Natural Gas : 98.9% Distillate Fuel Oil : 1.1% |
| Millennium Power | Millennium Power Company, LLC | Charlton, MA | ISO New England (ISNE) | 482.2 GWh | Mar 2001 | Sep 2025 | Natural Gas |
| ANP Bellingham Energy Project | Bellingham Power Generation LLC | Bellingham, MA | ISO New England (ISNE) | 3.5 TWh | Oct 2002 | Sep 2025 | Natural Gas |
| ANP Blackstone Energy Project | ANP Blackstone Energy Company LLC | Blackstone, MA | ISO New England (ISNE) | 3.0 TWh | May 2001 | Sep 2025 | Natural Gas |
| Fore River Generating Station | Calpine Fore River Energy Center, LLC | North Weymouth, MA | ISO New England (ISNE) | 3.1 TWh | Jul 2003 | Sep 2025 | Natural Gas : 95.1% Distillate Fuel Oil : 4.9% |
| New England Wind LLC | Avangrid Power LLC | Florida, MA | ISO New England (ISNE) | 74.8 GWh | Nov 2012 | Sep 2025 | Wind |
| Berkshire Wind Power Project | Massachusetts Mun Wholes Electric Co | Lanesboro, MA | ISO New England (ISNE) | 39.1 GWh | Apr 2011 | Sep 2025 | Wind |
| Mt Wachusett Community College | Mt Wachusett Community College | Gardner, MA | ISO New England (ISNE) | 4.3 GWh | Feb 2011 | Sep 2025 | Wind |
| Cottage Street Solar Facility | Western Massachusetts Electric Company | Springfield, MA | ISO New England (ISNE) | 3.5 GWh | Apr 2014 | Sep 2025 | Solar |
| Cape Cod Air Force Station - 6 SWS | US Air Force | Sagamore, MA | ISO New England (ISNE) | 4.6 GWh | Dec 2013 | Sep 2025 | Wind |
| Dept of Corrections NCCI Wind | Dept of Corrections NCCI Wind | Gardner, MA | ISO New England (ISNE) | 5.6 GWh | Oct 2013 | Sep 2025 | Wind |
| Framingham State University Plant | Framingham State University | Framingham, MA | ISO New England (ISNE) | 41.0 MWh | May 1974 | Sep 2025 | Solar : 78.0% Distillate Fuel Oil : 22.0% |
| Spring Hill Road | AES Distributed Energy | Barre, MA | ISO New England (ISNE) | 772.0 MWh | Nov 2015 | Sep 2025 | Solar |
| Exelon West Medway II LLC | Constellation Power, Inc | Medway, MA | ISO New England (ISNE) | 171.4 GWh | Feb 2019 | Sep 2025 | Natural Gas : 97.7% Kerosene : 2.3% |
| Southbridge Solar | AES Distributed Energy | Southbridge, MA | ISO New England (ISNE) | 2.2 GWh | Feb 2016 | Sep 2025 | Solar |
| Salem Harbor Power Development LP | Salem Harbor Power Development LP | Salem, MA | ISO New England (ISNE) | 1.7 TWh | Apr 2018 | Sep 2025 | Natural Gas |
| Southwick Solar PV | NSTAR Electric Company | Southwick, MA | ISO New England (ISNE) | 8.2 GWh | Dec 2018 | Sep 2025 | Solar |
| Montague Site 36-Grosolar | NSTAR Electric Company | Millers Falls, MA | ISO New England (ISNE) | 5.9 GWh | Sep 2018 | Sep 2025 | Solar |
Browse Power Plants By Massachusetts Counties
Figures are based on September 2025 generation numbers.| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Norfolk County, MA | # 1 | 38 | 7.3 TWh |
| Worcester County, MA | # 2 | 190 | 4.9 TWh |
| Middlesex County, MA | # 3 | 68 | 3.7 TWh |
| Essex County, MA | # 4 | 39 | 2.5 TWh |
| Hampden County, MA | # 5 | 86 | 1.7 TWh |
| Bristol County, MA | # 6 | 71 | 947.8 GWh |
| Plymouth County, MA | # 7 | 84 | 848.5 GWh |
| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Barnstable County, MA | # 8 | 23 | 435.9 GWh |
| Suffolk County, MA | # 9 | 13 | 429.2 GWh |
| Franklin County, MA | # 10 | 33 | 290.3 GWh |
| Hampshire County, MA | # 11 | 37 | 270.0 GWh |
| Berkshire County, MA | # 12 | 44 | 250.6 GWh |
| Dukes County, MA | # 13 | 7 | 9.9 GWh |