2nd largest plant in Maine · 662nd nationally
Westbrook Energy Center Power Plant is a natural gas power plant in Maine with a nameplate capacity of 564 MW. It generates roughly 2.4M MWh per year — enough to power about 224,466 average U.S. homes.
Its capacity factor of 48% puts it in the middle range — running steadily but not full-time. At 812 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 (564 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 | Westbrook Energy Center Power Plant |
|---|---|
| Operator | Westbrook Energy Center |
| City | Westbrook |
| County | Cumberland County |
| State | Maine |
| ZIP | 04092 |
| Coordinates | 43.65750, -70.37500 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| STG3 | Natural Gas Fired Combined Cycle | Natural Gas | 196 MW | Operating | 2001 |
| GTG1 | Natural Gas Fired Combined Cycle | Natural Gas | 184 MW | Operating | 2001 |
| GTG2 | Natural Gas Fired Combined Cycle | Natural Gas | 184 MW | Operating | 2001 |
| CO₂ | 956.8k metric tons |
|---|---|
| SO₂ | 5 metric tons |
| NOₓ | 116 metric tons |
| CO₂ Rate | 812 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. |
Natural gas plants are the workhorse of the modern grid. Combined-cycle units achieve very high efficiency and can ramp up and down quickly to balance variable renewables. They emit roughly half the CO₂ per MWh of coal and far less of other pollutants, but they still release upstream methane during fuel extraction.