How do I check a specific address in Belmont?

Use the free sitelume interactive map at https://sitelume.com — search any Belmont address to see which mapped zones it falls in, layer by layer.

Belmont, CA— fire, flood & earthquake hazard information

Belmont is a city in San Mateo County in the San Francisco Bay Area, covering about 4.6 square miles. This page summarizes what official government maps show for Belmont: 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 Belmont’s area that falls inside each mapped zone.

View Belmont on the interactive map → to check any specific address, free.

Wildfire hazard severity zones

Per CAL FIRE's Fire Hazard Severity Zone maps, 26% of Belmont is in a Very High fire hazard severity zone. The remainder of its area is outside currently designated zones.

Very High severity zone

26%

FEMA flood zones

3% of Belmont lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO); 6% is in the 0.2% annual chance (500-year) area. Federally backed mortgages in a Special Flood Hazard Area generally require flood insurance.

Special Flood Hazard Area (100-yr)	3%
0.2% annual chance (500-yr)	6%

Earthquake faults & seismic zones

The nearest mapped fault, the San Andreas fault zone, is about 2.4 mi (3.9 km) from the center of Belmont. 20% of its area is in a state-designated liquefaction zone of required investigation. 33% is in an earthquake-induced landslide zone.

Nearest mapped fault	San Andreas fault zone — 2.4 mi (3.9 km)
Liquefaction zone	20%
Earthquake-induced landslide zone	33%

Dam inundation, aircraft noise & air quality

2% of Belmont lies within a state-reviewed dam-failure inundation area; annual average fine-particle (PM2.5) concentration across its census tracts is 8.3 μg/m³, and its composite pollution burden ranks around the 18th percentile statewide.

Dam-failure inundation area	2%
Annual PM2.5 (tract average)	8.3 μg/m³
Pollution burden percentile (statewide)	~18

Frequently asked questions

Is Belmont in a wildfire hazard severity zone?: Per CAL FIRE's Fire Hazard Severity Zone maps, 26% of Belmont is in a Very High fire hazard severity zone. The remainder of its area is outside currently designated zones.
Is Belmont in a FEMA flood zone?: 3% of Belmont lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO); 6% is in the 0.2% annual chance (500-year) area. Federally backed mortgages in a Special Flood Hazard Area generally require flood insurance.
What earthquake faults and seismic zones affect Belmont?: The nearest mapped fault, the San Andreas fault zone, is about 2.4 mi (3.9 km) from the center of Belmont. 20% of its area is in a state-designated liquefaction zone of required investigation. 33% is in an earthquake-induced landslide zone.
How do I check a specific address in Belmont?: Use the free sitelume interactive map at https://sitelume.com — search any Belmont address to see which mapped zones it falls in, layer by layer.

Nearby in San Mateo 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.