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) | 6.3 GWh | Dec 1927 | Dec 2024 | Water |
| Indian Orchard Plant 1 | Solutia Inc-Indian | Springfield, MA | ISO New England (ISNE) | 137.0 MWh | Apr 1985 | Aug 2025 | Natural Gas |
| International Paper Woronoco Mill | Eagle Creek Renewable Energy, LLC | Woronoco, MA | ISO New England (ISNE) | 5.4 GWh | Dec 1912 | Dec 2024 | Water |
| Indian Orchard PV Facility | Western Massachusetts Electric Company | Springfield, MA | ISO New England (ISNE) | 2.5 GWh | Nov 2011 | Dec 2024 | Solar |
| Ipswich Wind Turbine | Town of Ipswich - (MA) | Ipswich, MA | ISO New England (ISNE) | 1.5 GWh | Apr 2011 | Dec 2024 | Wind |
| Integrys MA Solar, LLC - Ashburnham Site | Integrys MA Solar, LLC | Ashburnham, MA | ISO New England (ISNE) | 3.5 GWh | Nov 2013 | Dec 2024 | Solar |
| Indian Hill Solar LLC | CVI CleanCapital Solar 1 LLC | Palmer, MA | ISO New England (ISNE) | 1.5 GWh | Mar 2014 | Dec 2024 | Solar |
| Iron Horse Solar 4, LLC | Iron Horse Solar 4, LLC | North Billerica, MA | ISO New England (ISNE) | 6.9 GWh | May 2017 | Dec 2024 | Solar |
| Iron Horse Solar I CSG | Iron Horse Solar 1, LLC | North Billerica, MA | ISO New England (ISNE) | 4.3 GWh | Nov 2016 | Dec 2024 | Solar |
| ISM Solar Dighton 2, LLC CSG | 38 Degrees North, LLC | Dighton, MA | ISO New England (ISNE) | 3.7 GWh | Nov 2017 | Dec 2024 | Solar |
| Incom Solar, LLC CSG | 38 Degrees North, LLC | Charlton, MA | ISO New England (ISNE) | 3.6 GWh | Oct 2017 | Dec 2024 | Solar |
| Indian River Hydro | Eagle Creek Renewable Energy, LLC | Russell, MA | ISO New England (ISNE) | 1.3 GWh | Nov 1909 | Dec 2024 | Water |
Browse Power Plants By Massachusetts Counties
Figures are based on August 2025 generation numbers.| County | State Rank | Active Plants | Aug 2025 Generation |
|---|---|---|---|
| Norfolk County, MA | # 1 | 38 | 7.2 TWh |
| Worcester County, MA | # 2 | 190 | 4.7 TWh |
| Middlesex County, MA | # 3 | 68 | 3.8 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 | 852.5 GWh |
| County | State Rank | Active Plants | Aug 2025 Generation |
|---|---|---|---|
| Suffolk County, MA | # 8 | 13 | 429.4 GWh |
| Barnstable County, MA | # 9 | 23 | 427.2 GWh |
| Franklin County, MA | # 10 | 33 | 301.7 GWh |
| Hampshire County, MA | # 11 | 37 | 270.0 GWh |
| Berkshire County, MA | # 12 | 44 | 244.3 GWh |
| Dukes County, MA | # 13 | 7 | 9.9 GWh |