Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Northport | Arthur Kill Generating Station |
|---|---|---|
| Capacity | 1,564 MW | 877.5 MW |
| Technology | Petroleum Liquids, Natural Gas Steam Turbine | Natural Gas Steam Turbine |
| Operator | National Grid Generation LLC | NRG Arthur Kill Operations Inc |
| Operating units | 5 | 3 |
| Latest 12-month generation | 4.53 TWh | 1.58 TWh |
| Latest complete-year capacity factor | 29.8% (2025) | 26.8% (2025) |
| National technology rank | #10 of 257 | #35 of 257 |
| Latest EIA report | 2026-06 | 2026-06 |