From Halopedia, the Halo wiki

There is more information available on this subject at HAZMAT on the English Wikipedia.
Hazmat redirects here. For the armor core, see OSTEO combat engineering suit. For the Halo Infinite in-game event, see Hazmat (event).
A UNSC military HAZMAT team investigates New Phoenix in the aftermath of the Didact's attack.

HAZMAT (short for Hazardous Materials) teams are personnel tasked with cleaning up potentially dangerous spills and handling material that is not safe for other personnel to handle. They clean up things like broken and leaking Shaw-Fujikawa Translight Engines.[1]

When they do not remove these problems directly, they may tag a space-borne hazard with HAZNAV (navigation hazard) satellites to warn other ships from straying too close to it.[2]

List of appearances[edit]


  1. ^ Halo: Ghosts of Onyx, page 53
  2. ^ Halo: Ghosts of Onyx, page 57