Dataset · Hazard
FEMA NFHL
Not available yet (parcel level) nfhl
FEMA's National Flood Hazard Layer: the effective flood-hazard zones of the Flood Insurance Rate Maps.
- Publisher
- FEMA
- Category
- Hazard
- Period
- The release date of each state's file
- Refresh cadence
- Monthly
- Measures
- None (geometry)
- Licence
- Public domain (U.S. federal government work)
Source
| Fact | Value |
|---|---|
| Publisher | FEMA |
| Product | National Flood Hazard Layer |
| Source | https://www.fema.gov/flood-maps/national-flood-hazard-layer (opens in a new tab) |
| Category | Hazard |
| Period | The release date of each state's file |
| Refresh cadence | Monthly |
| Geographies | Flood-zone polygons, imported state by state (a pilot state so far). There are no metro measures. |
| Availability | Not available yet (parcel level) |
| Cadastre key | nfhl |
Licence and attribution
| Fact | Value |
|---|---|
| Licence | Public domain (U.S. federal government work) |
| Terms | https://www.fema.gov/about/website-information (opens in a new tab) |
| Register status | Production approved; licence open |
| Allowed uses | evaluation, internal, public_display, derived_analytics, redistribution, bulk_export, public_geometry |
This source requires no credit line beyond naming the publisher. Cite it as FEMA, National Flood Hazard Layer.
Known gaps and caveats
- Imported for parcel-level screening, which is not available yet; nothing at metro level reads it.
- Coverage is not complete nationwide and changes continually.