28th largest plant in New York · 745th nationally
Port Jefferson is a natural gas power plant in New York with a nameplate capacity of 498 MW. It generates roughly 355.5k MWh per year — enough to power about 33,854 average U.S. homes.
Its capacity factor of 8% reflects intermittent or peaking operation. At 1447 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 (498 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 | Port Jefferson |
|---|---|
| Operator | National Grid Generation Llc |
| City | Port Jefferson |
| County | Suffolk County |
| State | New York |
| ZIP | 11776 |
| Coordinates | 40.94970, -73.07851 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 3 | Natural Gas Steam Turbine | Natural Gas | 188 MW | Operating | 1958 |
| 4 | Natural Gas Steam Turbine | Natural Gas | 188 MW | Operating | 1960 |
| GT2 | Natural Gas Fired Combustion Turbine | Natural Gas | 53.0 MW | Operating | 2002 |
| GT3 | Natural Gas Fired Combustion Turbine | Natural Gas | 53.0 MW | Operating | 2002 |
| 2 | Petroleum Liquids | Residual Oil | 46.0 MW | Retired | 1950 |
| ST1 | Petroleum Liquids | Residual Oil | 46.0 MW | Retired | 1948 |
| GT1 | Petroleum Liquids | Distillate Oil | 16.0 MW | Operating | 1966 |
| CO₂ | 257.1k metric tons |
|---|---|
| SO₂ | 37 metric tons |
| NOₓ | 101 metric tons |
| CO₂ Rate | 1447 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 | New York Independent System Operator |
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.