Since 2001, FEMA has issued Flood Zone maps for San Mateo designating certain sections of town as "high risk". These high risk areas are required to carry flood insurance if properties have a federally backed mortgage. As projects have been completed, FEMA has reevaluated the high risk maps and made adjustments to their rate maps. The 2015 certified map remains the most recent Flood Zone Map for San Mateo.
Potential (2017) FEMA Flood Zone Map, forecasting the potential radius of homes that may be added to the high-risk flood zones as a result of the recent Coastal Study. This map could be adopted as early as Summer 2017. The green area is the current high-risk zone, and the red area is FEMA's current proposed expansion of the high-risk zones.
2001 FEMA Flood Zone Map. On October 19, 2001, FEMA issued a Flood Insurance Rate Map (FIRM) for the City of San Mateo that placed parts of the City within a special flood hazard area. This designation made flood insurance mandatory for properties within the hazard area.
Due to the size of the file, it may take a few minutes to load. Please be patient. You can also Right-Click and choose Save As and save file to your desktop.
Sign Up for Future Updates
Please share your contact information through Notify Me. By sharing your information, we can update you on future opportunities to stay engaged in the outreach effort.