28th largest plant in Pennsylvania · 474th nationally
Ontelaunee Energy Center is a natural gas power plant in Pennsylvania with a nameplate capacity of 728 MW. It generates roughly 4.2M MWh per year — enough to power about 396,769 average U.S. homes.
Its capacity factor of 65% puts it in the middle range — running steadily but not full-time. At 834 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 (728 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 | Ontelaunee Energy Center |
|---|---|
| Operator | Ontelaunee Energy Center |
| City | Reading |
| County | Berks County |
| State | Pennsylvania |
| ZIP | 19605 |
| Coordinates | 40.42190, -75.93560 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | Natural Gas | 250 MW | Operating | 2002 |
| CTG2 | Natural Gas Fired Combined Cycle | Natural Gas | 250 MW | Operating | 2002 |
| STG | Natural Gas Fired Combined Cycle | Natural Gas | 228 MW | Operating | 2002 |
| Owner | Location | Share |
|---|---|---|
| Ontelaunee Power Operating Company Llc | Reading, PA | 10000.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| CO₂ | 1.7M metric tons |
|---|---|
| SO₂ | 9 metric tons |
| NOₓ | 101 metric tons |
| CO₂ Rate | 834 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 | RFC |
|---|---|
| Balancing Authority | Pjm Interconnection, Llc |
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.