49th largest plant in Washington · 2149th nationally
Sumas Power Plant is a natural gas power plant in Washington with a nameplate capacity of 126 MW. It generates roughly 834.9k MWh per year — enough to power about 79,511 average U.S. homes.
Its capacity factor of 76% puts it in the middle range — running steadily but not full-time. At 968 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 (126 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 | Sumas Power Plant |
|---|---|
| Operator | Puget Sound Energy Inc |
| City | Sumas |
| County | Whatcom County |
| State | Washington |
| ZIP | 98295 |
| Coordinates | 48.99050, -122.27330 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combined Cycle | Natural Gas | 87.8 MW | Operating | 1993 |
| GEN2 | Natural Gas Fired Combined Cycle | Natural Gas | 37.7 MW | Operating | 1993 |
| CO₂ | 404.1k metric tons |
|---|---|
| SO₂ | 7 metric tons |
| NOₓ | 56 metric tons |
| CO₂ Rate | 968 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 | WECC |
|---|---|
| Balancing Authority | Puget Sound Energy |
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.