How do I check a specific address in Moskowite Corner?

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

Moskowite Corner, CA— fire, flood & earthquake hazard information

Moskowite Corner is a unincorporated community in Napa County in the San Francisco Bay Area, covering about 2.8 square miles. This page summarizes what official government maps show for Moskowite Corner: 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 Moskowite Corner’s area that falls inside each mapped zone.

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

Wildfire hazard severity zones

Per CAL FIRE's Fire Hazard Severity Zone maps, 33% is in a High zone, 67% is in a Moderate zone. The remainder of its area is outside currently designated zones.

High severity zone	33%
Moderate severity zone	67%

FEMA flood zones

3% of Moskowite Corner 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)

Earthquake faults & seismic zones

The nearest mapped fault, the Green Valley fault, is about 2.3 mi (3.7 km) from the center of Moskowite Corner.

Nearest mapped fault

Green Valley fault — 2.3 mi (3.7 km)

Dam inundation, aircraft noise & air quality

less than 1% of Moskowite Corner lies within a state-reviewed dam-failure inundation area; annual average fine-particle (PM2.5) concentration across its census tracts is 7.3 μg/m³, and its composite pollution burden ranks around the 18th percentile statewide.

Dam-failure inundation area	less than 1%
Annual PM2.5 (tract average)	7.3 μg/m³
Pollution burden percentile (statewide)	~18

Frequently asked questions

Is Moskowite Corner in a wildfire hazard severity zone?: Per CAL FIRE's Fire Hazard Severity Zone maps, 33% is in a High zone, 67% is in a Moderate zone. The remainder of its area is outside currently designated zones.
Is Moskowite Corner in a FEMA flood zone?: 3% of Moskowite Corner 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 Moskowite Corner?: The nearest mapped fault, the Green Valley fault, is about 2.3 mi (3.7 km) from the center of Moskowite Corner.
How do I check a specific address in Moskowite Corner?: Use the free sitelume interactive map at https://sitelume.com — search any Moskowite Corner address to see which mapped zones it falls in, layer by layer.

Nearby in Napa 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.