Trinity County, CA Fire Regulations: Propane Storage (2026)

Propane (LP-gas) storage in unincorporated Trinity County is governed by the California Fire Code and NFPA 58 (the Liquefied Petroleum Gas Code), enforced by CAL FIRE and the county building department, rather than by a unique county propane ordinance. Under NFPA 58 separation standards, above-ground residential ASME tanks between 125 and 500 gallons must be placed at least 10 feet from any building or structure, at least 10 feet from the property line, and at least 10 feet from ignition sources such as an air-conditioner condenser, electric meter, or gas meter. Smaller cylinders (under 125 gallons) have shorter required separations, and very large tanks require greater distances. Relief-valve and vent-discharge clearances also apply - generally 5 feet for ASME tanks from openings below the discharge and from ignition sources. Because Trinity County is high-fire-risk State Responsibility Area, propane installations should also be sited with wildfire safety in mind: CAL FIRE recommends keeping the area around the tank clear of flammable vegetation as part of defensible space. Local jurisdictions and fire authorities can impose stricter setbacks, so homeowners should verify requirements with the Trinity County Building Department and the local fire authority having jurisdiction before installing or relocating a tank. Always use a licensed propane supplier or contractor for placement, piping, and connection to ensure code compliance.