Bloomfield, CA— fire, flood & earthquake hazard information
Bloomfield is a unincorporated community in Sonoma County in the San Francisco Bay Area, covering about 8.1 square miles. This page summarizes what official government maps show for Bloomfield: 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 Bloomfield’s area that falls inside each mapped zone.
View Bloomfield on the interactive map → to check any specific address, free.
Wildfire hazard severity zones
Per CAL FIRE's Fire Hazard Severity Zone maps, less than 1% is in a High zone, 99% is in a Moderate zone. The remainder of its area is outside currently designated zones.
| High severity zone | less than 1% |
| Moderate severity zone | 99% |
FEMA flood zones
4% of Bloomfield lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO). Federally backed mortgages in a Special Flood Hazard Area generally require flood insurance.
| Special Flood Hazard Area (100-yr) | 4% |
Earthquake faults & seismic zones
The nearest mapped fault, the Americano Creek fault, is about 0.7 mi (1.2 km) from the center of Bloomfield. 2 named fault traces in the USGS Quaternary fault database cross its boundary.
| Nearest mapped fault | Americano Creek fault — 0.7 mi (1.2 km) |
| Named fault traces crossing boundary | 2 |
Dam inundation, aircraft noise & air quality
annual average fine-particle (PM2.5) concentration across its census tracts is 6.6 μg/m³, and its composite pollution burden ranks around the 14th percentile statewide.
| Annual PM2.5 (tract average) | 6.6 μg/m³ |
| Pollution burden percentile (statewide) | ~14 |
Frequently asked questions
- Is Bloomfield in a wildfire hazard severity zone?
- Per CAL FIRE's Fire Hazard Severity Zone maps, less than 1% is in a High zone, 99% is in a Moderate zone. The remainder of its area is outside currently designated zones.
- Is Bloomfield in a FEMA flood zone?
- 4% of Bloomfield lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO). Federally backed mortgages in a Special Flood Hazard Area generally require flood insurance.
- What earthquake faults and seismic zones affect Bloomfield?
- The nearest mapped fault, the Americano Creek fault, is about 0.7 mi (1.2 km) from the center of Bloomfield. 2 named fault traces in the USGS Quaternary fault database cross its boundary.
- How do I check a specific address in Bloomfield?
- Use the free sitelume interactive map at https://sitelume.com — search any Bloomfield 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.