Piedmont, CA— fire, flood & earthquake hazard information
Piedmont is a city in Alameda County in the San Francisco Bay Area, covering about 1.7 square miles. This page summarizes what official government maps show for Piedmont: CAL FIRE fire hazard severity zones, FEMA flood zones, state seismic hazard zones, dam inundation areas, airport noise contours, and air-quality indicators. Figures are the share of Piedmont’s area that falls inside each mapped zone.
View Piedmont on the interactive map → to check any specific address, free.
Wildfire hazard severity zones
Per CAL FIRE's Fire Hazard Severity Zone maps, 11% of Piedmont is in a Very High fire hazard severity zone. The remainder of its area is outside currently designated zones.
| Very High severity zone | 11% |
FEMA flood zones
FEMA's National Flood Hazard Layer does not map any Special Flood Hazard Areas within Piedmont. Unmapped does not mean flooding cannot occur — it means no zone is currently designated.
Earthquake faults & seismic zones
The nearest mapped fault, the Hayward fault zone, is about 1.2 mi (1.9 km) from the center of Piedmont. 2% of its area is in a state-designated liquefaction zone of required investigation. 12% is in an earthquake-induced landslide zone.
| Nearest mapped fault | Hayward fault zone — 1.2 mi (1.9 km) |
| Liquefaction zone | 2% |
| Earthquake-induced landslide zone | 12% |
Dam inundation, aircraft noise & air quality
annual average fine-particle (PM2.5) concentration across its census tracts is 9.3 μg/m³, and its composite pollution burden ranks around the 22th percentile statewide.
| Annual PM2.5 (tract average) | 9.3 μg/m³ |
| Pollution burden percentile (statewide) | ~22 |
Frequently asked questions
- Is Piedmont in a wildfire hazard severity zone?
- Per CAL FIRE's Fire Hazard Severity Zone maps, 11% of Piedmont is in a Very High fire hazard severity zone. The remainder of its area is outside currently designated zones.
- Is Piedmont in a FEMA flood zone?
- FEMA's National Flood Hazard Layer does not map any Special Flood Hazard Areas within Piedmont. Unmapped does not mean flooding cannot occur — it means no zone is currently designated.
- What earthquake faults and seismic zones affect Piedmont?
- The nearest mapped fault, the Hayward fault zone, is about 1.2 mi (1.9 km) from the center of Piedmont. 2% of its area is in a state-designated liquefaction zone of required investigation. 12% is in an earthquake-induced landslide zone.
- How do I check a specific address in Piedmont?
- Use the free sitelume interactive map at https://sitelume.com — search any Piedmont address to see which mapped zones it falls in, layer by layer.
Nearby in Alameda County
Sources: CAL FIRE Fire Hazard Severity Zones; FEMA National Flood Hazard Layer; USGS Quaternary Faults; CGS Seismic Hazard Zones & Alquist-Priolo zones; Cal OES dam inundation maps; county ALUC noise contours; CalEnviroScreen 4.0. Area shares are computed against each place’s Census TIGER boundary (last computed 2026-07-24). Boundaries and zone designations change; always verify with the issuing agency.