Directory of Power Plants in Massachusetts
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Indian Orchard | Central Rivers Power MA, LLC | Indian Orchard, MA | ISO New England (ISNE) | 3.5 GWh | Dec 1927 | Dec 2025 | Water |
| Indian Orchard Plant 1 | Solutia Inc-Indian | Springfield, MA | ISO New England (ISNE) | 7.4 GWh | Apr 1985 | May 2026 | Natural Gas |
| International Paper Woronoco Mill | Eagle Creek Renewable Energy, LLC | Woronoco, MA | ISO New England (ISNE) | 6.6 GWh | Dec 1912 | Dec 2025 | Water |
| Indian Orchard PV Facility | Western Massachusetts Electric Company | Springfield, MA | ISO New England (ISNE) | 2.4 GWh | Nov 2011 | Dec 2025 | Solar |
| Ipswich Wind Turbine | Town of Ipswich - (MA) | Ipswich, MA | ISO New England (ISNE) | 2.1 GWh | Apr 2011 | Dec 2025 | Wind |
| Integrys MA Solar, LLC - Ashburnham Site | Integrys MA Solar, LLC | Ashburnham, MA | ISO New England (ISNE) | 2.7 GWh | Nov 2013 | Dec 2025 | Solar |
| Indian Hill Solar LLC | CVI CleanCapital Solar 1 LLC | Palmer, MA | ISO New England (ISNE) | 1.4 GWh | Mar 2014 | Dec 2025 | Solar |
| Iron Horse Solar 4, LLC | Iron Horse Solar 4, LLC | North Billerica, MA | ISO New England (ISNE) | 7.1 GWh | May 2017 | Dec 2025 | Solar |
| Iron Horse Solar I CSG | Iron Horse Solar 1, LLC | North Billerica, MA | ISO New England (ISNE) | 4.1 GWh | Nov 2016 | Dec 2025 | Solar |
| ISM Solar Dighton 2, LLC CSG | 38 Degrees North, LLC | Dighton, MA | ISO New England (ISNE) | 3.6 GWh | Nov 2017 | Dec 2025 | Solar |
| Incom Solar, LLC CSG | 38 Degrees North, LLC | Charlton, MA | ISO New England (ISNE) | 3.2 GWh | Oct 2017 | Dec 2025 | Solar |
| Indian River Hydro | Eagle Creek Renewable Energy, LLC | Russell, MA | ISO New England (ISNE) | 1.8 GWh | Nov 1909 | Dec 2025 | Water |
Browse Power Plants By Massachusetts Counties
Figures are based on May 2026 generation numbers.| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Franklin County, MA | # 13 | 33 | 182.1 GWh |
| Berkshire County, MA | # 12 | 46 | 198.8 GWh |
| Hampshire County, MA | # 11 | 39 | 226.9 GWh |
| Dukes County, MA | # 10 | 7 | 376.1 GWh |
| Suffolk County, MA | # 9 | 14 | 428.0 GWh |
| Barnstable County, MA | # 8 | 25 | 628.3 GWh |
| Bristol County, MA | # 7 | 74 | 645.8 GWh |
| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Plymouth County, MA | # 6 | 84 | 814.7 GWh |
| Hampden County, MA | # 5 | 89 | 1.9 TWh |
| Middlesex County, MA | # 4 | 68 | 1.9 TWh |
| Essex County, MA | # 3 | 41 | 2.5 TWh |
| Worcester County, MA | # 2 | 197 | 5.4 TWh |
| Norfolk County, MA | # 1 | 40 | 6.7 TWh |