FEMA National Flood Hazard Layer Legend

This data is served directly from FEMA gis service servers. https://hazards.fema.gov/femaportal/wps/portal/NFHLWMS View the status of the NFHL map services here: https://floodmaps.fema.gov/NFHL/status.shtml

The National Flood Hazard Layer (NFHL) dataset represents the current effective flood risk data for those parts of the country where maps have been modernized by the Federal Emergency Management Agency (FEMA). The data in this service was published by FEMA as of July 18, 2025 (Latest Study Effective Date = 07/08/2025; Latest LOMR Effective Date = 07/09/2025). Also see the Feature Service and Tile service. See full details.

The National Flood Hazard Layer (NFHL) dataset represents the current effective flood risk data for those parts of the country where maps have been modernized by the Federal Emergency Management Agency (FEMA).

Federal Emergency Management Agency (FEMA) National Flood Hazard Layer (effective data only).  Refer to GIS Web Services for the FEMA National Flood Hazard Layer (NFHL) for map service information.  Data is updated as needed.

Contains data from the National Flood Hazard Layer, a GIS database of flood risks and regulatory flood determination data.

MassGIS Data: FEMA National Flood Hazard Layer (NFHL) Full MassGIS metadata: https://www.mass.gov/info-details/massgis-data-fema-national-flood-hazard-layer