HOLTSVILLE
OperatingOil power plant
- Capacity
- 567 MW
- Primary fuel
- Oil
- County
- Suffolk County
- Operator
- NATIONAL GRID GENERATION LLC
- Status
- Operating
- Commissioned
- 1974
- EIA plant ID
- 8007
- Coordinates
- 40.8170, -73.0663
HOLTSVILLE, a 567 MW Oil power plant in Suffolk County, New York. Operated by NATIONAL GRID GENERATION LLC, commissioned 1974.
Weather peril exposure
HOLTSVILLE is a 567 MW oil power plant in Suffolk County, NY, operated by NATIONAL GRID GENERATION LLC, commissioned in 1974. Suffolk County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.6 of 5 at the 15th national percentile. Coastal flooding is the leading peril, rated Very High by FEMA at the 86th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to an oil plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Suffolk County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Coastal flooding | Very High | 86th | 4.4 of 5 | 3.8 |
| Hurricane | Relatively High | 78th | 4.1 of 5 | 0.20 |
| Earthquake | Relatively Moderate | 65th | 3.6 of 5 | <0.01 |
| Wildfire | Relatively Low | 34th | 2.3 of 5 | <0.01 |
| Ice storm | Very High | 28th | 2.1 of 5 | 0.67 |
| Winter weather | Very High | 19th | 1.7 of 5 | 10.3 |
| Tornado | Relatively Moderate | 12th | 1.5 of 5 | 0.47 |
| Lightning | Very High | 9th | 1.4 of 5 | 23.8 |
| Riverine flooding | Relatively High | 9th | 1.4 of 5 | 3.5 |
| Strong wind | Relatively High | 9th | 1.3 of 5 | 3.2 |
| Heat wave | Relatively Moderate | 6th | 1.3 of 5 | 3.9 |
| Hail | Relatively Low | 3rd | 1.1 of 5 | 1.3 |
Model hail, wind and flood exposure for Suffolk County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.