Power plants in New Hampshire emit a combined 2.3M 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 | Granite Ridge | New Hampshire | Natural Gas | 1.4M |
| 2 | Newington Energy Center | New Hampshire | Natural Gas | 375.5k |
| 3 | Merrimack | New Hampshire | Coal | 186.0k |
| 4 | Burgess Biopower | New Hampshire | Biomass | 128.9k |
| 5 | Wheelabrator Concord Facility | New Hampshire | Biomass | 102.8k |
| 6 | Newington | New Hampshire | Oil | 51.4k |
| 7 | Hampton Facility | New Hampshire | Natural Gas | 9.7k |
| 8 | Dartmouth College Heating Plant | New Hampshire | Oil | 5.2k |
| 9 | Unh 7.9 Mw Plant | New Hampshire | Biomass | 4.4k |
| 10 | Bridgewater Power Lp | New Hampshire | Biomass | 334 |
PowerPlantsNearMe.com. (2026). Most Polluting Power Plants in New Hampshire. Derived from EIA Form 860, EIA Form 923, and EPA eGRID. Retrieved from https://powerplantsnearme.com/most-polluting-power-plants/new-hampshire
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