Vapor Suppression

What Is Vapor Suppression?

Vapor suppression refers to the technique of controlling or reducing the release of hazardous chemical vapors during a hazardous materials (hazmat) incident. This is typically achieved by applying foam, water sprays, or specialized agents to the source of the vapor to minimize airborne contamination. Not to be confused with vapor recovery, which involves capturing vapors for reuse or disposal, vapor suppression focuses on immediate hazard reduction. It is a critical tactic within the Hot Zone of an incident under the Incident Command System (ICS) to protect responders and the public.

Why Vapor Suppression Matters on the Fireground

Effective vapor suppression reduces inhalation risks and limits the spread of toxic vapors, protecting emergency responders using SCBA (self-contained breathing apparatus) and nearby populations. It also helps maintain safer conditions for decontamination and containment efforts, supporting overall incident stabilization and mitigation.