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Data source · U.S. Federal Emergency Management Agenc…

NFHL Flood Hazard Areas (S_FLD_HAZ_AR)

FEMA's National Flood Hazard Layer flood-hazard-area layer provides current effective flood zone, Special Flood Hazard Area, base-flood-elevation, depth, velocity, reversion, study, and source-citation attributes for bu…

FreeAPIFull fileNationalUnited States
What it answers ↓
1Questions answered
1Fields delivered
1Country
Source CON Effective flood ha… FEA Flood depth

Questions this answers

1 · best fit first
QuestionPrimary fit
Effective flood hazard classification

FEMA's current effective NFHL flood-hazard-area layer returns flood zone, Special Flood Hazard Area status, static base flood elevation, and related effective classification fields for a buyer-selected location; FEMA discloses that some U.S. areas remain unmapped.

Fields it delivers

1 field
Flood depth
CoverageNational

FEMA describes NFHL as current effective U.S. flood-hazard data covering more than 90 percent of the U.S. population. Coverage is incomplete where effective digital mapping is unavailable; no separately coded territory footprint is asserted without product-specific evidence.

Access & termsFree

FEMA provides the NFHL through a public viewer, unauthenticated GIS web services, and county/state GIS downloads without a checkout, subscription, or stated fee. The classification follows that documented standing no-cost route and does not infer price from FEMA's public-sector identity.

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