The cold zone is defined as the area where which of the following is located?

• A. Where incident command post and EMS equipment and personnel are located
• B. Where decontamination takes place
• C. The hot zone
• D. The public safety staging area

Answer: (A)

In hazardous materials or mass-casualty incidents, scene zones are organized to prevent contamination spread and to manage operations. The cold zone is the area outside the contamination and serves as the base for command and support. It is where the incident command post, EMS equipment, and personnel are located, keeping essential operations and communications away from the hazard.

Decontamination happens in the warm zone, which lies between the cold and hot zones. The hot zone is the contaminated area where the hazard is present and exposure risk is highest. The public safety staging area is typically placed in the cold zone outside the hot zone to assemble units safely, but the defining feature of the cold zone is housing the command post and medical assets.