Flood Hazard Data

The Federal Emergency Management Agency is the federal agency ultimately responsible for flood hazard mapping in the United States.  While the Wisconsin Department of Natural Resources acts as a technical contractor for the mapping in Wisconsin, all data are distributed by FEMA.

FEMA provides a number of options for consuming flood hazard data, including interactive mapping applications, GIS web services (ArcGIS REST, WMS, WFS) and downloadable data.

Last updated: February 1, 2024