In a hazardous materials decontamination process, what is the purpose of the warm zone?

• A. The hot zone containing the contaminants.
• B. The cold zone where clean equipment is stored.
• C. The decontamination/transition zone where personnel and gear are decontaminated.
• D. The administrative office for incident command.

Answer: (C)

The warm zone is the decontamination/transition space between the contaminated area and the clean area. Its job is to provide a controlled area where personnel and gear can be decontaminated before moving into the cold zone, preventing contaminants from spreading. In this zone, responders remove outer PPE, undergo decon procedures, and manage contaminated equipment so that only decontaminated items and people enter the clean area. It acts as a buffer between the hot zone, where hazards are present, and the cold zone, which is kept clean. The administrative office sits outside of this function and is not the area designated for decontamination.