5 county-level rules, plus city-specific rules for 1 city in Napa County, California.
Verified from official government sources
Napa County allows small recreational fires and approved gas fire features under the California Fire Code as adopted in Napa County Code Chapter 15.32, but no-burn day restrictions from the Bay Area Air Quality Management District (BAAQMD) apply to wood-burning fire pits, and Red Flag Warnings from CAL FIRE can prohibit any open flame in the wildland-urban interface.
All fireworks, including state-classified safe-and-sane devices, are prohibited in unincorporated Napa County under Napa County Code Chapter 8.28 (Fireworks). California Health and Safety Code 12500-12728 separately prohibits dangerous fireworks statewide, and no Napa County jurisdiction has authorized safe-and-sane sales by ordinance.
Napa County Code Chapter 8.36 (Fire Protection - Fire Hazard Abatement), as amended by Ordinance 1467, requires defensible space around all structures and treats unmaintained vegetation as a public nuisance subject to abatement. California Public Resources Code Section 4291 layers state-level 100-foot clearance requirements in the State Responsibility Area.
Cal. Pub. Resources Code § 4291
4291. (a) A person who owns, leases, controls, operates, or maintains a building or structure in the state responsibility area shall at all times do all of the following: (1) (A) Maintain defensible space of 100 feet from each side and from the front and rear of the structure, but not beyond the property line, except as provided in subparagraph (B). The amount of fuel modification necessary sha...
All outdoor burning in unincorporated Napa County is regulated by the Bay Area Air Quality Management District under BAAQMD Regulation 5 (Open Burning), with concurrent CAL FIRE Sonoma-Lake-Napa Unit notification required. Wood burning is banned on Spare the Air days, and agricultural burning is only allowed on BAAQMD-designated burn days within permissive seasons.
Napa County contains extensive Very High Fire Hazard Severity Zones across the Vaca Mountains, Howell Mountain, Mount Veeder, and the Mayacamas Range, mapped by CAL FIRE under the 2025 Fire Hazard Severity Zone update. New construction in mapped zones must comply with California Building Code Chapter 7A wildfire-exposure standards, adopted locally through Napa County Code Chapter 15.32.
Cal. Pub. Resources Code §§ 4201-4204 (CAL FIRE Fire Hazard Severity Zones)
California's seasonally dry Mediterranean climate lends itself to wildfires, and in an effort to better prepare, CAL FIRE is required to classify the severity of fire hazard in areas of California. The History of Fire Hazard Severity Zone Maps Fire Hazard Severity Zone maps arose from major destructive fires, prompting the recognition of these areas and strategies to reduce wildfire risks. Legi...
1 cities in Napa County have their own fire regulations rules. Each link goes to that city's dedicated page with code citations.
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