Hazard Control Zones are categorized as which three zones?

• A. Red, Blue, Green
• B. Hot, Warm, Cold
• C. Inner, Outer, Perimeter
• D. Offensive, Defensive, Stabilized

Answer: (B)

Hazard control zones are organized by exposure risk and how you manage the hazard, so responders can work safely while preventing contamination from spreading. The three zones are hot, warm, and cold. The hot zone is the area immediately around the release where the hazard is present and direct operations occur; it requires the highest level of PPE and strict entry/exit controls to protect responders. The warm zone serves as a transition between hot and cold, where decontamination begins, PPE is doffed and donned under supervision, and personnel and equipment are prepared to support or re-enter operations. The cold zone is the clean area where command, staging, and administrative activities take place, remaining uncontaminated so it can safely coordinate the response. These boundaries are clearly marked and controlled, with entry and exit passing through decontamination and established procedures to prevent cross-contamination. Other naming schemes aren’t standard hazmat zone terminology—they describe different concepts (like security perimeters or incident posture) and don’t convey the risk-based separation used for safe operations.