124th largest plant in Arizona · 6020th nationally
Cogeneration 1 is a natural gas power plant in Arizona with a nameplate capacity of 9.0 MW. It generates roughly 54.1k MWh per year — enough to power about 5,156 average U.S. homes.
Its capacity factor of 69% puts it in the middle range — running steadily but not full-time. At 606 lb CO₂/MWh, its emission rate sits below the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (9.0 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 | Cogeneration 1 |
|---|---|
| Operator | University Of Arizona |
| City | Tucson |
| County | Pima County |
| State | Arizona |
| ZIP | 85721 |
| Coordinates | 32.22992, -110.95280 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| CT1 | Natural Gas Fired Combined Cycle | Natural Gas | 9.0 MW | Operating | 2002 |
| CO₂ | 16.4k metric tons |
|---|---|
| NOₓ | 45 metric tons |
| CO₂ Rate | 606 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 | Tucson Electric Power Company |
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.