Sleepy Hollow, CA— fire, flood & earthquake hazard information
Sleepy Hollow is a unincorporated community in Marin County in the San Francisco Bay Area, covering about 3.0 square miles. This page summarizes what official government maps show for Sleepy Hollow: 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 Sleepy Hollow’s area that falls inside each mapped zone.
View Sleepy Hollow on the interactive map → to check any specific address, free.
Wildfire hazard severity zones
Per CAL FIRE's Fire Hazard Severity Zone maps, 100% is in a Moderate zone. The remainder of its area is outside currently designated zones.
| Moderate severity zone | 100% |
FEMA flood zones
FEMA's National Flood Hazard Layer does not map any Special Flood Hazard Areas within Sleepy Hollow. Unmapped does not mean flooding cannot occur — it means no zone is currently designated.
Earthquake faults & seismic zones
The nearest mapped fault, the Burdell Mountain fault, is about 7.1 mi (11.4 km) from the center of Sleepy Hollow.
| Nearest mapped fault | Burdell Mountain fault — 7.1 mi (11.4 km) |
Dam inundation, aircraft noise & air quality
annual average fine-particle (PM2.5) concentration across its census tracts is 8.2 μg/m³, and its composite pollution burden ranks around the 9th percentile statewide.
| Annual PM2.5 (tract average) | 8.2 μg/m³ |
| Pollution burden percentile (statewide) | ~9 |
Frequently asked questions
- Is Sleepy Hollow in a wildfire hazard severity zone?
- Per CAL FIRE's Fire Hazard Severity Zone maps, 100% is in a Moderate zone. The remainder of its area is outside currently designated zones.
- Is Sleepy Hollow in a FEMA flood zone?
- FEMA's National Flood Hazard Layer does not map any Special Flood Hazard Areas within Sleepy Hollow. Unmapped does not mean flooding cannot occur — it means no zone is currently designated.
- What earthquake faults and seismic zones affect Sleepy Hollow?
- The nearest mapped fault, the Burdell Mountain fault, is about 7.1 mi (11.4 km) from the center of Sleepy Hollow.
- How do I check a specific address in Sleepy Hollow?
- Use the free sitelume interactive map at https://sitelume.com — search any Sleepy Hollow address to see which mapped zones it falls in, layer by layer.
Nearby in Marin 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.