Directory of Power Plants in Massachusetts
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Onyx - Brockton Thatcher Landfill Solar CSG | Onyx Asset Services Group | Brockton, MA | ISO New England (ISNE) | 4.5 GWh | Oct 2017 | Dec 2023 | Solar |
| Old Wardour Solar | NuGen Capital Management | East Brookfield, MA | ISO New England (ISNE) | 7.2 GWh | Dec 2015 | Dec 2023 | Solar |
| One Patriot | Bloom Energy | Foxborough, MA | ISO New England (ISNE) | 14.3 GWh | Nov 2019 | Dec 2023 | Natural Gas |
| Oak Bluffs Diesel Generating Facility | Vineyard Reliability LLC | Oak Bluffs, MA | ISO New England (ISNE) | 1.7 GWh | Dec 1968 | Dec 2023 | Distillate Fuel Oil |
| Orange PV | Terraform Arcadia | Orange, MA | ISO New England (ISNE) | 2.4 GWh | Jun 2013 | Dec 2023 | Solar |
| OSG Solar 1 LLC | Navisun LLC | Orange, MA | ISO New England (ISNE) | 3.1 GWh | Jun 2012 | Dec 2023 | Solar |
| Oxford | CVI CleanCapital Solar 6 | Oxford, MA | ISO New England (ISNE) | 4.1 GWh | Jun 2014 | Dec 2023 | Solar |
| Oxford Solar | Citizens Enterprises Corporation | Oxford, MA | ISO New England (ISNE) | 6.5 GWh | Jan 2020 | Dec 2023 | Solar |
| Onyx - Pembroke Landfill Solar | Onyx Asset Services Group | Pembroke, MA | ISO New England (ISNE) | 3.8 GWh | Nov 2017 | Dec 2023 | Solar |
| Old Middleboro Road Solar | Agilitas Energy, LLC | Rochester, MA | ISO New England (ISNE) | 9.7 GWh | Dec 2022 | Dec 2023 | Solar |
| Oak Street Solar | Citizens Enterprises Corporation | Springfield, MA | ISO New England (ISNE) | 5.6 GWh | Nov 2019 | Dec 2023 | Solar |
| Onset East Community Solar Facility | BCC Solar III, LLC | Wareham, MA | ISO New England (ISNE) | 1.9 GWh | Mar 2016 | Dec 2022 | Solar |
| Onset West Community Solar Facility | BCC Solar III, LLC | Wareham, MA | ISO New England (ISNE) | 1.9 GWh | Mar 2016 | Dec 2022 | Solar |
| Oakdale Power Station | Massachusetts Water Res Auth | West Boylston, MA | ISO New England (ISNE) | 14.9 GWh | Apr 1951 | Dec 2022 | Water |
Browse Power Plants By Massachusetts Counties
Figures are based on June 2024 generation numbers.| County | State Rank | Active Plants | Jun 2024 Generation |
|---|---|---|---|
| Norfolk County, MA | # 1 | 36 | 6.4 TWh |
| Worcester County, MA | # 2 | 188 | 4.8 TWh |
| Middlesex County, MA | # 3 | 65 | 4.1 TWh |
| Essex County, MA | # 4 | 37 | 2.0 TWh |
| Hampden County, MA | # 5 | 83 | 1.4 TWh |
| Plymouth County, MA | # 6 | 73 | 871.2 GWh |
| Bristol County, MA | # 7 | 68 | 593.5 GWh |
| County | State Rank | Active Plants | Jun 2024 Generation |
|---|---|---|---|
| Suffolk County, MA | # 8 | 13 | 494.5 GWh |
| Franklin County, MA | # 9 | 31 | 437.0 GWh |
| Barnstable County, MA | # 10 | 21 | 157.3 GWh |
| Hampshire County, MA | # 11 | 35 | 144.9 GWh |
| Berkshire County, MA | # 12 | 35 | 58.2 GWh |
| Dukes County, MA | # 13 | 7 | 8.5 GWh |