Which standard is commonly referenced for extinguisher maintenance intervals?

• A. OSHA 1910.
• B. EPA 40 CFR.
• C. NFPA 10.
• D. FDA 21 CFR.

Answer: (C)

Standards for how portable fire extinguishers must be inspected and serviced. NFPA 10 is the standard most commonly referenced for maintenance intervals. It specifies the schedule and steps for keeping extinguishers ready: monthly visual checks, annual maintenance by a qualified person, and the required periodic hydrostatic testing and recharge or replacement based on the extinguisher type. This framework is widely adopted by fire codes and referenced in OSHA guidance for extinguisher upkeep. The other options address broader regulatory areas—general occupational safety rules, environmental regulations, or unrelated FDA rules—and do not specifically govern how often extinguishers must be maintained.