32nd largest plant in Massachusetts · 3718th nationally
Wheelabrator Millbury Facility is a biomass power plant in Massachusetts with a nameplate capacity of 47.6 MW. It generates roughly 314.0k MWh per year — enough to power about 29,903 average U.S. homes.
Its capacity factor of 75% puts it in the middle range — running steadily but not full-time. At 1823 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (47.6 MW nameplate × hours in the month). Filled bars are actual net generation reported to EIA Form 923. The gap between them is capacity factor made visible.
| Plant Name | Wheelabrator Millbury Facility |
|---|---|
| Operator | Wheelabrator Environmental Systems |
| City | Millbury |
| County | Worcester County |
| State | Massachusetts |
| ZIP | 01527 |
| Coordinates | 42.22140, -71.76690 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GEN1 | Municipal Solid Waste | Municipal Waste | 47.6 MW | Operating | 1987 |
| CO₂ | 286.1k metric tons |
|---|---|
| SO₂ | 425 metric tons |
| NOₓ | 687 metric tons |
| CO₂ Rate | 1823 lb/MWh |
Annual totals and CO₂ rate reported by EPA eGRID for 2023. Reference averages are approximate U.S.-wide figures from the same dataset.
| NERC Region | NPCC |
|---|---|
| Balancing Authority | Iso New England Inc. |
Biomass plants burn wood, agricultural waste, or methane from landfills to generate steam and electricity. They are considered carbon-neutral over long timescales when fuel is sustainably sourced, but they produce particulate emissions similar to coal.