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Flood Zones (FEMA NFHL)

Free

FEMA National Flood Hazard Layer for flood zone and SFHA analysis.

Set up this sourceGet the full contract and schemas as JSONConnect this source →

No key required. Included on Free.

What you can ask

  • “What does Flood Zones (FEMA NFHL) have for the area or asset I'm working on?”
  • “Pull the most recent Flood Zones (FEMA NFHL) records and put them in a table.”
  • “What does Flood Zones (FEMA NFHL) cover, and how fresh is the data?”

About this source

FEMA National Flood Hazard Layer data for flood zone analysis. Special Flood Hazard Areas (SFHA) require floodplain development permits. CRITICAL USAGE RULES: 1. No authentication required - free government API 2. sfhaIndicator=true means site is in Special Flood Hazard Area 3. Flood zones: A, AE, AO, AH (high risk), X (moderate/minimal risk) 4. Coordinates are latitude/longitude in WGS84

Connector ID floodzone

Provenance

PublisherFEMA National Flood Hazard Layer
Sourcehttps://hazards.fema.gov/arcgis/rest/services/public/NFHL/MapServer
Docshttps://www.fema.gov/flood-maps/national-flood-hazard-layer

Freshness & coverage

FreshnessFreshness not declared
GeographicUnited States
TemporalNot declared
AuthenticationNo credentials required

Caveats

  • ⚠ Screening data only; use the effective FEMA map and local floodplain authority for determinations.

› Methods (3)

Technical detail for developers: parameters, pagination, units, and freshness per method.

  • queryAtPoint

    read

    Query flood zones at a specific coordinate

    Required paramslatitudelongitude

  • queryInBbox

    read

    Query flood zones within a bounding box. Default page 50; geometry only if includeGeometry is true.

    Required paramsxminyminxmaxymax

  • getServiceInfo

    read

    Get NFHL service metadata and available layers