Department of Public Works

Flood Zone Determination Website - Information

The Flood Zone Determination Website allows you to locate property and determine its location within a Federal flood zone.

The Federal Emergency Management Agency (FEMA) publishes Flood Insurance Rate Maps (FIRMs) depicting areas subject to flood hazards. These Special Flood Hazard Areas (SFHAs) or Flood Zones include different types and levels of flooding risks. The flood insurance and building permit requirements depend on the designated flooding risk at a property.

The Flood Insurance Study (FIS) for Los Angeles County was issued by FEMA on September 26, 2008. It contains the flood insurance studies for the communities within the County of Los Angeles and is the basis for the Digital Flood Insurance Rate Maps issued on September 26, 2008. The FIS includes the engineering methods used, lists the Letters of Map Changes that were incorporated into the FIS, and provides peak discharges and flood profiles. The FIS consists of four volumes and each volume can be opened by clicking on the volume number.

View FEMA Flood Zone Definitions.