Power plants in Maine emit a combined 2.0M metric tons of CO₂ per year. The table below ranks the top emitters — predominantly coal and natural gas plants. Emission rates vary widely even within the same fuel type: efficient combined-cycle gas plants produce roughly 900 lb CO₂/MWh, while older coal plants can exceed 2,200 lb/MWh.
Emissions data comes from the EPA eGRID program. Zero-emission sources (nuclear, solar, wind, hydro) are excluded from this ranking. For methodology details, see the methodology page.
| # | Plant | State | Fuel | CO₂ (tons/yr) |
|---|---|---|---|---|
| 1 | Westbrook Energy Center Power Plant | Maine | Natural Gas | 956.8k |
| 2 | Maine Independence Station | Maine | Natural Gas | 415.1k |
| 3 | Rumford Power Llc | Maine | Natural Gas | 176.0k |
| 4 | Regional Waste Systems | Maine | Biomass | 97.4k |
| 5 | Rumford Cogeneration | Maine | Other Fossil | 75.9k |
| 6 | Woodland Pulp, Llc | Maine | Biomass | 48.9k |
| 7 | William F Wyman Hybrid | Maine | Oil | 44.2k |
| 8 | Somerset Plant | Maine | Biomass | 40.5k |
| 9 | Mmwac Resource Recovery Facility | Maine | Biomass | 40.0k |
| 10 | Androscoggin Energy Center | Maine | Natural Gas | 26.1k |
| 11 | Bucksport Generation Llc | Maine | Natural Gas | 10.0k |
| 12 | Eastern Maine Medical Center | Maine | Natural Gas | 9.6k |
| 13 | Eagle Point Energy Center | Maine | Biomass | 5.6k |
| 14 | Red Shield Envir Old Town Facility | Maine | Biomass | 3.4k |
| 15 | Cape Gas Turbine | Maine | Oil | 1.2k |
| 16 | Indeck West Enfield Energy Center | Maine | Biomass | 76 |
| 17 | Robbins Lumber | Maine | Oil | 52 |
PowerPlantsNearMe.com. (2026). Most Polluting Power Plants in Maine. Derived from EIA Form 860, EIA Form 923, and EPA eGRID. Retrieved from https://powerplantsnearme.com/most-polluting-power-plants/maine
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