Hawaii County, Hawaii
Hawaii County covers 4,028 square miles of land. Below is what the Isopleth API returned at the Census Bureau's interior point for the county (19.59776, -155.50244) on 2026-10-29. The ground sits at 2,515 m (8,250 ft) on a 15.8° slope, the mapped soil is excessively drained, it is outside a mapped FEMA floodplain, the nearest 69 kV+ substation is 30.0 km (18.6 mi) away and a major road is 10.6 km (6.6 mi) away. Values describe that one point, not the whole county; look up your own address or coordinates for your site.
Sample point values
| field | value | source |
|---|---|---|
| FEMA flood zone | D | FEMA_NFHL Federal Emergency Management Agencyvintage 155166_BASE4 |
| Inside a mapped floodplain | No | FEMA_NFHL Federal Emergency Management Agencyvintage 155166_BASE4 |
| Wildfire, annual frequency | 0.0049 events a year | FEMA_NRI Federal Emergency Management Agencyvintage December 2025 |
| Tornado, annual frequency | 0.0020 events a year | FEMA_NRI Federal Emergency Management Agencyvintage December 2025 |
| Hail, annual frequency | 0.012 events a year | FEMA_NRI Federal Emergency Management Agencyvintage December 2025 |
| On a mapped wetland | No | USFWS_NWI U.S. Fish and Wildlife Service |
| Elevation | 2,515 m (8,250 ft) | USGS_3DEP_COG U.S. Geological Surveyvintage 3DEP 1/3 arc-second seamless DEM |
| Slope | 15.8° | USGS_3DEP_COG U.S. Geological Survey |
| Soil drainage | Excessively drained | USDA_SSURGO U.S. Department of Agriculturevintage SSURGO HI801 mukey 2371213 |
| Soil hydrologic group | A | USDA_SSURGO U.S. Department of Agriculturevintage SSURGO HI801 mukey 2371213 |
| Farmland class | Prime | USDA_SSURGO U.S. Department of Agriculturevintage SSURGO HI801 mukey 2371213 |
| On protected land (PAD-US) | Yes | PAD_US USGS Protected Areas Database of the United States (PAD-US)vintage USGS PAD-US 4.1 (Protection Mechanism Category combined layer) |
| Surface manager | Private or unknown | BLM_SMA Bureau of Land Management |
| Solar resource (GHI) | 6.12 kWh/m²/day | NREL_SOLAR_RESOURCE_V1 NREL Solar Resource Data (NSRDB)vintage NREL PSM v3 multiyear annual average (1998-2016, ~4 km, Americas) |
| Mean wind speed at 100 m | 5.7 m/s | GLOBAL_WIND_ATLAS_V3 See source_url |
| Nearest substation (69 kV+) | 30.0 km (18.6 mi) | EIA_POWER U.S. Energy Information Administration |
| Electric utility | HAWAII ELECTRIC LIGHT CO INC | EIA_POWER U.S. Energy Information Administrationvintage HIFLD Electric Retail Service Territories |
| In a public water service area | No | EPA_CWS_SERVICE_AREAS U.S. Environmental Protection Agencyvintage V3.0 (2026-03-17) |
| Nearest major road | 10.6 km (6.6 mi) | OVERTURE_TRANSPORTATION © Overture Maps Foundation, © OpenStreetMap contributorsvintage 2026-10-21.0 |
| In an Opportunity Zone | No | HUD_OPPORTUNITY_ZONES U.S. Department of Housing and Urban Development |
Fields with no data at this point are left out. See the field catalog for all 351 fields.
Parcels
Parcel records: 384,035 parcels in 5 counties. Hawaii County has 135,718 of them. Published by Hawaii Statewide GIS Program; Counties of Hawaii, Honolulu, Kauai and Maui (Public, attribution); May 2026, refreshed annual.
Not published here: owner name, site address, total value, land use, sale date, zoning, year built.
The parcel under the sample point is 53,148.8 acres. parcel_enrich returns that record for any parcel you ask about, and parcel_search finds parcels by acreage, land use or value.
Look up your own site
curl https://api.isopleth.dev/v1/fetch -H "Authorization: Bearer $ISOPLETH_KEY" \
-H "Content-Type: application/json" \
-d '{"lat": 19.597764, "lng": -155.502443, "preset": "site_selection"}'
Or ask your assistant through the MCP server: “Using Isopleth, check flood zone, wetlands, soils and distance to power for [your address in Hawaii County, Hawaii].”
Buying land here? Check the Land’s Hawaii County page shows what its $29 report checks, built on these same Isopleth fields.
More in Hawaii: Maui County · Kauai County · Hawaii overview · all states