Directory of Power Plants in Maine
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Skelton | Brookfield White Pine Hydro LLC | Dayton, ME | ISO New England (ISNE) | 77.2 GWh | Dec 1947 | Dec 2025 | Water |
| Skyway Avenue Solar Farm | REA Investments, LLC | Frenchville, ME | ISO New England (ISNE) | 2.7 GWh | Feb 2024 | Dec 2025 | Solar |
| Solar Mule, LLC | Solar Mule, LLC | Oakland, ME | ISO New England (ISNE) | 2.1 GWh | Aug 2017 | Dec 2025 | Solar |
| Somerset Plant | Sappi Fine Paper North America-Somerset | Skowhegan, ME | ISO New England (ISNE) | 576.9 GWh | Dec 1975 | Aug 2026 | Black Liquor : 47.6% Wood/Wood Waste Solids : 31.5% Natural Gas : 12.7% Tire-derived Fuels : 4.3% Residual Fuel Oil : 3.1% Sludge Waste : 0.6% |
| SP-231 Clifton | Madison Energy Investments LLC | Clifton, ME | ISO New England (ISNE) | 5.4 GWh | Nov 2024 | Dec 2025 | Solar |
| SP-339 Mechanic Falls | Madison Energy Investments LLC | Mechanic Falls, ME | ISO New England (ISNE) | 1.4 GWh | Nov 2024 | Dec 2025 | Solar |
| Spruce Mountain WInd | CPV Spruce Mountain Wind LLC | Bryant Pond, ME | ISO New England (ISNE) | 52.6 GWh | Nov 2011 | Dec 2025 | Wind |
| Squa Pan Hydro Station | Algonquin Northern Maine | Masardis, ME | (NBSO) | 564.0 MWh | Nov 1941 | Dec 2025 | Water |
| Standish | Nautilus Solar Solutions | Standish, ME | ISO New England (ISNE) | 7.3 GWh | Sep 2023 | Dec 2025 | Solar |
| Stetson Wind I | Evergreen Wind, LLC | Danforth, ME | ISO New England (ISNE) | 145.9 GWh | Dec 2008 | Dec 2025 | Wind |
| Stetson Wind II | Evergreen Wind, LLC | Danforth, ME | ISO New England (ISNE) | 55.3 GWh | Feb 2010 | Dec 2025 | Wind |
| Stillwater B | Brookfield Black Bear Hydro, LLC | Old Town, ME | ISO New England (ISNE) | 9.4 GWh | Aug 2013 | Dec 2025 | Water |
| Stillwater Hydro Station | Brookfield Black Bear Hydro, LLC | Stillwater, ME | ISO New England (ISNE) | 5.9 GWh | Dec 1912 | Dec 2025 | Water |
| Three Corners Solar | Three Corners Solar, LLC | Unity, ME | ISO New England (ISNE) | 189.1 GWh | Jun 2024 | Aug 2026 | Solar |
| Town House | Nautilus Solar Solutions | Chelsea, ME | ISO New England (ISNE) | 8.3 GWh | Nov 2022 | Dec 2025 | Solar |
| Treasure Lane Solar 1 | AES Clean Energy | Manchester, ME | ISO New England (ISNE) | 7.6 GWh | Apr 2023 | Dec 2025 | Solar |
| Turner CSG LLC | Dimension Energy LLC | Turner, ME | ISO New England (ISNE) | 428.0 MWh | Jul 2025 | Dec 2025 | Solar |
| Twin Rivers Paper Co LLC | Twin Rivers Paper Co LLC | Madawaska, ME | (NBSO) | 105.1 GWh | Apr 1987 | Aug 2026 | Purchased Steam |
| Unity Solar | Madison Energy Holdings LLC | Unity, ME | ISO New England (ISNE) | 6.7 GWh | Nov 2021 | Dec 2025 | Solar |
| Upper Barker | KEI (Maine) Power Management (III) LLC | Auburn, ME | ISO New England (ISNE) | 4.0 GWh | Apr 1987 | Dec 2025 | Water |
| Valley Sun Solar | Valley Sun Solar LLC | Grand Isle, ME | ISO New England (ISNE) | 3.1 GWh | Nov 2024 | Dec 2025 | Solar |
| Walden Solar Maine V | Walden Solar Maine V LLC | Leeds, ME | ISO New England (ISNE) | 35.9 GWh | Nov 2024 | Dec 2025 | Solar |
| Washington WS01 | Nautilus Solar Solutions | Washington, ME | ISO New England (ISNE) | 5.1 GWh | May 2022 | Dec 2025 | Solar |
| Waste Management Crossroads LFGTE | WM Renewable Energy LLC | Norridgewock, ME | ISO New England (ISNE) | 21.9 GWh | Feb 2009 | Dec 2025 | Landfill Gas |
| Water Line Solar, LLC | Dimension Energy LLC | North Yarmouth, ME | ISO New England (ISNE) | 773.0 MWh | May 2025 | Dec 2025 | Solar |
| Water Street Solar | AES Distributed Energy | Randolph, ME | ISO New England (ISNE) | 7.2 GWh | Nov 2022 | Dec 2025 | Solar |
| Waterboro | Madison Energy Investments LLC | East Waterboro, ME | ISO New England (ISNE) | 7.1 GWh | Jun 2023 | Dec 2025 | Solar |
| Weaver Wind | Greenbacker Renewable Energy Corporation | Township 16, ME | ISO New England (ISNE) | 214.4 GWh | Nov 2020 | Aug 2026 | Wind |
| Webb Road Solar | NextGrid Mastic, LLC | Waterville, ME | ISO New England (ISNE) | 4.8 GWh | Aug 2022 | Dec 2025 | Solar |
| Wells (ME) | Nautilus Solar Solutions | Wells, ME | ISO New England (ISNE) | 8.4 GWh | Jun 2022 | Dec 2025 | Solar |
| West Buxton | Brookfield White Pine Hydro LLC | Buxton, ME | ISO New England (ISNE) | 20.6 GWh | Dec 1903 | Dec 2025 | Water |
| West Enfield Hydro | Brookfield Black Bear Hydro, LLC | West Enfield, ME | ISO New England (ISNE) | 70.2 GWh | Mar 1988 | Dec 2025 | Water |
| Westbrook Energy Center Power Plant | Westbrook Energy Center | Westbrook, ME | ISO New England (ISNE) | 3.6 TWh | Apr 2001 | Aug 2026 | Natural Gas |
| Weston Hydro | Brookfield White Pine Hydro LLC | Skowhegan, ME | ISO New England (ISNE) | 57.0 GWh | Dec 1919 | Dec 2025 | Water |
| William F Wyman Hybrid | FPL Energy Wyman LLC | Yarmouth, ME | ISO New England (ISNE) | 322.7 GWh | Dec 1956 | Jul 2026 | Residual Fuel Oil : 99.6% |
| Williams Hydro | Brookfield White Pine Hydro LLC | Solon, ME | ISO New England (ISNE) | 63.5 GWh | Dec 1938 | Dec 2025 | Water |
| Winslow PV - BD Solar 2 LLC | BD Solar 2 LLC | Winslow, ME | ISO New England (ISNE) | 10.3 GWh | Jun 2022 | Dec 2025 | Solar |
| Woodland Pulp, LLC | Woodland Pulp LLC | Baileyville, ME | (NBSO) | 344.2 GWh | May 1906 | Dec 2025 | Black Liquor : 37.9% Natural Gas : 30.9% Water : 16.6% Wood/Wood Waste Solids : 14.5% |
| Worumbo Hydro Station | Eagle Creek Renewable Energy, LLC | Lisbon Falls, ME | ISO New England (ISNE) | 74.3 GWh | Jan 1989 | Dec 2025 | Water |
| Wyman Hydro | Brookfield White Pine Hydro LLC | Bingham, ME | ISO New England (ISNE) | 295.2 GWh | Dec 1929 | Dec 2025 | Water |
| Wymans Deblois | REC RWD, LLC | Deblois, ME | (NBSO) | 7.8 GWh | Sep 2024 | Dec 2025 | Solar |
| 15 Glen Harris RD | ME Sandy River LLC | New Sharon, ME | ISO New England (ISNE) | 5.3 GWh | May 2024 | Dec 2025 | Solar |
Browse Power Plants By Maine Counties
Figures are based on August 2026 generation numbers.| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Cumberland County, ME | # 1 | 25 | 4.1 TWh |
| Penobscot County, ME | # 2 | 51 | 2.6 TWh |
| Oxford County, ME | # 3 | 24 | 1.7 TWh |
| Somerset County, ME | # 4 | 38 | 1.6 TWh |
| Washington County, ME | # 5 | 10 | 938.2 GWh |
| Franklin County, ME | # 6 | 18 | 765.3 GWh |
| Androscoggin County, ME | # 7 | 32 | 764.8 GWh |
| Aroostook County, ME | # 8 | 33 | 666.5 GWh |
| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Piscataquis County, ME | # 9 | 4 | 514.9 GWh |
| Hancock County, ME | # 10 | 16 | 484.9 GWh |
| York County, ME | # 11 | 26 | 311.4 GWh |
| Waldo County, ME | # 12 | 10 | 276.3 GWh |
| Kennebec County, ME | # 13 | 34 | 209.2 GWh |
| Sagadahoc County, ME | # 14 | 5 | 65.0 GWh |
| Knox County, ME | # 15 | 6 | 22.2 GWh |
| Lincoln County, ME | # 16 | 4 | 21.0 GWh |