Sebastopol, CA— fire, flood & earthquake hazard information
Sebastopol is a city in Sonoma County in the San Francisco Bay Area, covering about 1.9 square miles. This page summarizes what official government maps show for Sebastopol: 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 Sebastopol’s area that falls inside each mapped zone.
View Sebastopol on the interactive map → to check any specific address, free.
Wildfire hazard severity zones
CAL FIRE's current Fire Hazard Severity Zone maps do not designate any zones within Sebastopol. Individual properties near the boundary can still fall inside a neighboring zone — check the exact address on the map.
FEMA flood zones
17% of Sebastopol lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO); 2% 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) | 17% |
| 0.2% annual chance (500-yr) | 2% |
Earthquake faults & seismic zones
The nearest mapped fault, the unnamed faults NW of Santa Rosa, is about 1.5 mi (2.4 km) from the center of Sebastopol. 15% of its area is in a state-designated liquefaction zone of required investigation. less than 1% is in an earthquake-induced landslide zone.
| Nearest mapped fault | unnamed faults NW of Santa Rosa — 1.5 mi (2.4 km) |
| Liquefaction zone | 15% |
| Earthquake-induced landslide zone | less than 1% |
Dam inundation, aircraft noise & air quality
5% of Sebastopol lies within a state-reviewed dam-failure inundation area; annual average fine-particle (PM2.5) concentration across its census tracts is 6.6 μg/m³, and its composite pollution burden ranks around the 30th percentile statewide.
| Dam-failure inundation area | 5% |
| Annual PM2.5 (tract average) | 6.6 μg/m³ |
| Pollution burden percentile (statewide) | ~30 |
Frequently asked questions
- Is Sebastopol in a wildfire hazard severity zone?
- CAL FIRE's current Fire Hazard Severity Zone maps do not designate any zones within Sebastopol. Individual properties near the boundary can still fall inside a neighboring zone — check the exact address on the map.
- Is Sebastopol in a FEMA flood zone?
- 17% of Sebastopol lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO); 2% 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 Sebastopol?
- The nearest mapped fault, the unnamed faults NW of Santa Rosa, is about 1.5 mi (2.4 km) from the center of Sebastopol. 15% of its area is in a state-designated liquefaction zone of required investigation. less than 1% is in an earthquake-induced landslide zone.
- How do I check a specific address in Sebastopol?
- Use the free sitelume interactive map at https://sitelume.com — search any Sebastopol address to see which mapped zones it falls in, layer by layer.
Nearby in Sonoma 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.