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NFIRS Codes Cheat Sheet - NFIRS Coding - NFIRS Examples - FDIDs - POCs

NERIS replaced NFIRS in 2026
NERIS replaced NFIRS in 2026. See our NERIS resources.

NFIRS 5.0 Incident Type: ‘Chemical Release, Reaction, or Toxic Condition Group’

Incident Type Value
Code 42X
Name Chemical Release, Reaction, or Toxic Condition Group
Group Hazardous Condition - No Fire Group
Incident Types in Group?
Incident Type Incident Type Name
42X Chemical Release, Reaction, or Toxic Condition Group
420 Toxic Condition - Other
421 Chemical Hazard (no Spill or Leak)
422 Chemical Spill or Leak
423 Refrigeration Leak
424 Carbon Monoxide Incident
 
 
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