Which is not a recognized hazmat zone?

Which is not a recognized hazmat zone?

• A. Cold zone
• B. Warm zone
• C. Hot zone
• D. Green zone

Answer: (D)

Understanding hazmat incident zones: responders separate the area into three defined zones to control exposure and manage operations. The hot zone is the area closest to the release where contamination is present, and entry is limited to trained personnel wearing proper PPE. The warm zone surrounds the hot zone and includes decontamination corridors and support functions, acting as the transition between contamination and safety. The cold zone lies outside, where incident command, staging, and non-hazardous activities occur, kept free from exposure.

A green zone isn’t part of this established three-zone framework. The recognized hazmat zones are hot, warm, and cold, so naming a zone green would not match standard guidance and could create confusion in applying protective measures and responsibilities. Some contexts might use color terminology for other safety concepts, but within hazmat incident zoning, green is not a recognized zone.