COVANTA HEMPSTEAD
OperatingBiomass power plant
- Capacity
- 79 MW
- Primary fuel
- Biomass
- County
- Nassau County
- Operator
- COVANTA HEMPSTEAD COMPANY
- Status
- Operating
- Commissioned
- 1989
- EIA plant ID
- 10642
- Coordinates
- 40.7384, -73.5901
COVANTA HEMPSTEAD, a 79 MW Biomass power plant in Nassau County, New York. Operated by COVANTA HEMPSTEAD COMPANY, commissioned 1989.
Weather peril exposure
COVANTA HEMPSTEAD is a 79 MW biomass power plant in Nassau County, NY, operated by COVANTA HEMPSTEAD COMPANY, commissioned in 1989. Nassau County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.4 of 5 at the 10th national percentile. Coastal flooding is the leading peril, rated Very High by FEMA at the 77th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a biomass plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Nassau County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Coastal flooding | Very High | 77th | 4.1 of 5 | 3.8 |
| Hurricane | Relatively High | 76th | 4.1 of 5 | 0.17 |
| Earthquake | Relatively Moderate | 75th | 4.0 of 5 | <0.01 |
| Ice storm | Very High | 63rd | 3.5 of 5 | 0.72 |
| Wildfire | Very Low | 30th | 2.2 of 5 | <0.01 |
| Winter weather | Very High | 25th | 2.0 of 5 | 9.8 |
| Riverine flooding | Relatively High | 18th | 1.7 of 5 | 3.3 |
| Tornado | Relatively Moderate | 13th | 1.5 of 5 | 0.13 |
| Lightning | Very High | 13th | 1.5 of 5 | 27.3 |
| Strong wind | Relatively High | 11th | 1.4 of 5 | 4.9 |
| Heat wave | Relatively Moderate | 8th | 1.3 of 5 | 5.8 |
| Hail | Very Low | 1st | 1.1 of 5 | 1.7 |
Model hail, wind and flood exposure for Nassau 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.