Flood Zones: Pittsburg vs San Ramon

Pittsburg's waterfront and low-lying areas along the San Joaquin River are designated FEMA Flood Zone AE with mapped base flood elevations. Construction in these Special Flood Hazard Areas requires elevation above base flood elevation, flood vents, and mandatory flood insurance for federally backed mortgages. Pittsburg participates in the National Flood Insurance Program (NFIP).

San Ramon has FEMA-mapped flood zones primarily along San Ramon Creek, Alamo Creek, and their tributaries. Properties in Special Flood Hazard Areas (SFHA, Zones A and AE) are subject to FEMA flood insurance requirements for federally-backed mortgages and to elevation requirements under the city's floodplain management ordinance. The city participates in the National Flood Insurance Program (NFIP) and enforces the California Model Floodplain Management Ordinance. New construction in SFHAs must have lowest floor elevated to or above the Base Flood Elevation (BFE).