HomePrint FriendlyEmail Page

Go To Search
Click to Home
About the CountyDepartmentsNew ResidentsOur MunicipalitiesOfficialsHow Do I...?
Mapping Resources
GIS Web Services for the FEMA National Flood Hazard Layer (NFHL)

FEMA’s National Flood Hazard Layer

FEMA provides access to the National Flood Hazard Layer through web mapping services. The National Flood Hazard Layer is a computer database that contains FEMA’s flood hazard map data.

The data depict flood hazard information and supporting data used to develop the information. The primary flood hazard classification is indicated in the Flood Hazard Zones layer.

The NFHL layers include:

  • Flood hazard zones and labels
  • River Miles Markers
  • Cross-sections and coastal transects and their labels
  • Letter of Map Revision (LOMR) boundaries and case numbers
  • Flood Insurance Rate Map (FIRM) boundaries, labels and effective dates
  • Coastal Barrier Resources System (CBRS) and Otherwise Protected Area (OPA) units
  • Community boundaries and names
  • Levees
  • Hydraulic and flood control structures
  • Profile and coastal transect baselines
  • Limit of Moderate Wave Action(LiMWA)

Not all effective Flood Insurance Rate Maps (FIRM) have GIS data available. To view a list of available county and single-jurisdiction flood study data in GIS format and check the status of the NFHL GIS services please visit the NFHL Status Page.

FEMA GeoPlatform

The NFHL GIS service is available through FEMAs GeoPlatform, an ArcGIS Online portal containing a variety of FEMA-related data.

To view the NFHL on the FEMA GeoPlatform go to NFHL on FEMA GeoPlatform. Once the GeoPlatform is launched simply type in your address or zoom in to the location you are interested in.