Wildfire Zones: Carson vs Pomona
How do wildfire zones rules compare between Carson, CA and Pomona, CA?
Carson has fewer restrictions than Pomona.
Carson, CA
Los Angeles County
Carson lies in Los Angeles County's urban/industrial core and is largely outside CAL FIRE-designated Very High Fire Hazard Severity Zones. There is no Local Responsibility Area VHFHSZ mapped over the developed portion of Carson, so WUI building standards (Cal. Building Code Chapter 7A) generally do not apply — but PRC §4291 defensible space is mandatory on any parcel that does fall in a designated zone.
View full Carson rules →Pomona, CA
Los Angeles County
Portions of northern Pomona near the foothills are in or near fire hazard severity zones. CalFire maps designate State Responsibility Areas. Defensible space requirements apply per CA PRC Section 4291.
View full Pomona rules →Key Facts Comparison
| Fact | Carson | Pomona |
|---|---|---|
| Carson VHFHSZ status | Mostly NOT mapped as Very High Fire Hazard Severity Zone (CAL FIRE OSFM) | - |
| WUI building code | CBC Chapter 7A applies only to FHSZ-mapped parcels | - |
| Defensible space | PRC §4291 applies to any FHSZ parcel — 100 ft | - |
| Dominant fire risk | Industrial / refinery (Marathon, Phillips 66) — regulated by Cal/OSHA PSM 8 CCR §5189 | - |
| Fire authority | LA County Fire Department (LACoFD) | - |
| Risk Areas | - | Northern foothills near Claremont |
| Authority | - | CalFire / LA County Fire |
| Defensible Space | - | 100 ft per PRC Section 4291 |
| Maps | - | CalFire FHSZ maps |
Highlighted rows indicate differences between cities.
Carson FAQ
Is Carson in a wildfire hazard zone?
The developed core of Carson is not mapped as a Very High Fire Hazard Severity Zone by CAL FIRE / Office of the State Fire Marshal. Carson's fire risk is dominated by industrial and refinery exposures rather than wildland fire.
Do I need Chapter 7A ignition-resistant materials when I build?
Generally no — California Building Code Chapter 7A applies only to structures in a designated FHSZ. Check the OSFM Fire Hazard Severity Zone viewer for your specific parcel before assuming exemption.
Where can I check my parcel's fire hazard zone?
Use the California Office of the State Fire Marshal Fire Hazard Severity Zone viewer at osfm.fire.ca.gov — search by address. LACoFD also maintains local hazard maps.
Pomona FAQ
How much defensible space do I need?
Typically 30 feet of lean/clean zone and 100 feet of reduced fuel zone around structures in Pomona wildfire areas.
Is my property in a wildfire zone?
Check with Pomona fire department or your state wildfire hazard map. Real estate disclosures must include wildfire zone status.
Compare other topics
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