Port Jefferson
Natural gas power plant · Suffolk County, New York
Nameplate capacity
498 MW
Rank in New York
#28
of 1,152 plants
In service since
1958
November 1958
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Steam Turbine
- Operator
- National Grid Generation LLC
- County
- Suffolk County
- Generating units
- 5
- Share of state capacity
- 1.11%
- Rank among natural gas plants in New York
- #19 of 103
- EIA plant code
- 2517
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 3 | Natural Gas Steam Turbine | 188 MW | 192 MW | 1958 | Operating |
| 4 | Natural Gas Steam Turbine | 188 MW | 193 MW | 1960 | Operating |
| GT2 | Natural Gas Fired Combustion Turbine | 53 MW | 43 MW | 2002 | Operating |
| GT3 | Natural Gas Fired Combustion Turbine | 53 MW | 40 MW | 2002 | Operating |
| GT1 | Petroleum Liquids | 16 MW | 13 MW | 1966 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in New York
| Danskammer Generating Station | Natural gas | 537 MW |
| Zeltmann | Natural gas | 528 MW |
| Selkirk Cogen | Natural gas | 446 MW |
| Narrows Gas Turbines Generating | Natural gas | 352 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 498 MW solar plant and a 498 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All New York power plants · What New York actually generates