Directory of Power Plants in Maine
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Oakfield Wind Project | Onward Energy | City of Oakfield, ME | ISO New England (ISNE) | 329.4 GWh | Sep 2015 | Jun 2026 | Wind |
| Oakland | Nautilus Solar Solutions | Oakland, ME | ISO New England (ISNE) | 8.7 GWh | Aug 2022 | Dec 2025 | Solar |
| Orono B | Brookfield Black Bear Hydro, LLC | Orono, ME | ISO New England (ISNE) | 17.2 GWh | Oct 2013 | Dec 2025 | Water |
| Orono Hydro Station | Brookfield Black Bear Hydro, LLC | Orono, ME | ISO New England (ISNE) | 6.2 GWh | Dec 2008 | Dec 2025 | Water |
| Otis Hydro | Eagle Creek Renewable Energy, LLC | Livermore Falls, ME | ISO New England (ISNE) | 40.1 GWh | Dec 1984 | Jun 2026 | Water |
| Our Katahdin | Greenbacker Renewable Energy Corporation | Millenocket, ME | ISO New England (ISNE) | 5.8 GWh | Nov 2024 | Dec 2025 | Solar |
| Oxford PV - BD Solar Oxford LLC | BD Solar Oxford LLC | Oxford, ME | ISO New England (ISNE) | 12.9 GWh | May 2021 | Dec 2025 | Solar |
Browse Power Plants By Maine Counties
Figures are based on June 2026 generation numbers.| County | State Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| Androscoggin County, ME | # 6 | 32 | 764.2 GWh |
| Aroostook County, ME | # 8 | 33 | 665.0 GWh |
| Cumberland County, ME | # 1 | 25 | 4.1 TWh |
| Franklin County, ME | # 7 | 18 | 759.6 GWh |
| Hancock County, ME | # 10 | 16 | 479.0 GWh |
| Kennebec County, ME | # 13 | 34 | 209.1 GWh |
| Knox County, ME | # 15 | 6 | 22.2 GWh |
| Lincoln County, ME | # 16 | 4 | 21.0 GWh |
| County | State Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| Oxford County, ME | # 3 | 24 | 1.7 TWh |
| Penobscot County, ME | # 2 | 51 | 2.6 TWh |
| Piscataquis County, ME | # 9 | 4 | 501.1 GWh |
| Sagadahoc County, ME | # 14 | 5 | 65.0 GWh |
| Somerset County, ME | # 4 | 38 | 1.6 TWh |
| Waldo County, ME | # 12 | 10 | 282.6 GWh |
| Washington County, ME | # 5 | 10 | 964.8 GWh |
| York County, ME | # 11 | 26 | 301.2 GWh |