OSHA Fire Extinguisher Requirements - 1910.157 General Guide

OSHA's 1910.157 rule has a defined scope for covered workplaces. This is general research-based guidance for business owners and fire-protection contractors; verify the current OSHA text, workplace facts, adopted codes, and qualified advice before acting.

What OSHA 1910.157 Requires

OSHA's standard for portable fire extinguishers (29 CFR 1910.157) applies to all employers who provide fire extinguishers for employee use in the workplace. If you have extinguishers mounted anywhere in your building — and employees are expected or permitted to use them — these rules apply.

Inspection Requirements (1910.157(e))

1. Monthly Visual Inspection — 1910.157(e)(2)

Portable extinguishers must be visually inspected at least once per month (every 30 days). The inspection must verify all seven NFPA 10 §7.2 checkpoints:

• Extinguisher is in its designated place (not moved or missing)
• No obstruction to access or visibility — the path is clear
• Operating instructions on the nameplate are legible and face outward
• Safety seals and tamper indicators are intact and not broken
• No obvious physical damage, corrosion, leakage, or clogged nozzle
• Pressure gauge reading is in the operable (green) range
• Fullness determined by weighing or hefting (especially for non-gauge types like CO2)

Who can perform monthly inspections: The employer, a designated employee, or building maintenance staff. No certification is required.

Documentation requirement: OSHA requires that monthly inspection records be kept — the date of inspection and the initials of the person performing it. This can be recorded on the extinguisher's paper tag or in an electronic log. OSHA inspectors will ask for these records during an audit.

2. Annual Maintenance — 1910.157(e)(3)

Extinguishers must undergo annual maintenance checks at intervals not exceeding 12 months. OSHA explicitly states that annual maintenance must be performed "in accordance with NFPA 10" and by a qualified, trained individual.

Who can perform annual maintenance: A certified fire extinguisher technician. The annual inspection goes beyond visual — it includes weight verification, internal component inspection, hydrostatic date checking, and proper tagging. Certification is required.

Record keeping: Records of annual maintenance must be kept for the life of the extinguisher or until the next annual inspection, whichever is longer. At minimum, the tag must show:

• Month and year the maintenance was performed
• Person or company performing the work
• Identification of the extinguisher serviced

Whether electronic records are acceptable or preferred depends on the current rule, record type, workplace, insurer, and other applicable requirements. Confirm before relying on a digital record.

Maintenance and Hydrostatic Testing (1910.157(f))

OSHA 1910.157(f) requires that extinguishers be hydrostatically tested at the intervals specified in Table L-1 of the standard, which mirrors NFPA 10 §8.3. Key testing intervals:

Hydrostatic testing must be performed by a certified facility with DOT-calibrated equipment. It cannot be done in the field. Extinguishers that fail hydrostatic testing must be condemned and removed from service — they cannot be repaired or recharged.

For a complete breakdown of hydrostatic testing costs and procedures, see our fire extinguisher hydrostatic testing guide.

Mounting, Placement, and Location (1910.157(c))

OSHA 1910.157(c) specifies:

• Extinguishers must be mounted on brackets or in cabinets — they cannot sit on the floor
• The carrying handle of a portable extinguisher up to 40 lbs must be no more than 5 feet from the floor
• For extinguishers over 40 lbs, the carrying handle must be no more than 3.5 feet from the floor
• The bottom of any extinguisher must be at least 4 inches above the floor
• Extinguishers must be located along normal paths of travel, near exits, and not obstructed

See our NFPA 10 location and placement guide for complete travel distance requirements by hazard class.

Employee Training Requirements (1910.157(g))

If employers expect or permit their employees to use fire extinguishers, OSHA requires:

• Initial training: Upon employment, before the employee could face a fire emergency
• Annual refresher: At least once every 12 months thereafter
• Training content: General principles of fire extinguisher use, the hazards of incipient-stage fire fighting, and which extinguisher types match which fire classes

Exemption from training: If the employer has a written emergency action plan that requires all employees to evacuate immediately and designates only specific, trained fire response personnel to use extinguishers — then general employees do not need training. This is the "total evacuation" exemption under 1910.157(g)(1).

OSHA Penalties and Enforcement

OSHA penalties are adjusted annually for inflation. The 2026 maximum penalties are:

Beyond monetary fines, a workplace fire where extinguishers were found non-compliant creates significant liability exposure — workers' compensation claims, civil lawsuits from injured employees or visitors, and potential criminal charges in cases of willful negligence resulting in serious injury or death.

Who is Exempt from 1910.157?

Not all employers are required to provide fire extinguishers. OSHA 1910.157(b) exempts employers who:

• Have a written fire safety policy requiring total and immediate employee evacuation upon fire alarm
• Have an emergency action plan meeting 1910.38 requirements
• Have a fire prevention plan meeting 1910.39 requirements
• And do not require any employee to use extinguishers

However, most commercial properties — including offices, retail, restaurants, warehouses, and industrial facilities — do have extinguishers and are therefore subject to 1910.157. Additionally, local fire codes, insurance carriers, and landlord lease agreements often require extinguishers regardless of OSHA exemption status.

How FireInspected helps organize OSHA-related records

FireInspected's early paid beta can help teams organize observations, planned dates, and evidence where configured. It does not determine OSHA applicability, maintain compliance, or replace a qualified review:

• Record review: Keep monthly observations and planned dates visible to the responsible team. No software can guarantee that a check is completed or accepted during an OSHA review.
• Digital records: Where configured, records can include dates, technician details, and findings for team review. They are not instant proof of compliance or a guarantee of OSHA acceptance.
• Professional PDF reports: After every annual maintenance, generate a complete PDF report with all OSHA-required documentation fields. Your customer files it once and is covered until the next inspection.
• Deficiency tracking: Flagged extinguishers with specific NFPA 10 deficiency codes link to the exact OSHA citation — so the building owner knows what to fix and why.

For the complete inspection requirements checklist, see our NFPA 10 inspection requirements guide.