Carbon Monoxide Incident
Fire departments commonly respond on carbon monoxide incidents and they are coded separately in NFIRS.
When carbon monoxide was detected, code the incident as 424 – Carbon Monoxide Incident.
When there was an alarm /detector malfunction, but no carbon monoxide was detected, use
736 – Carbon Monoxide Detector Activation Due To Malfunction.
When there was an alarm activation, no sign of device malfunction, but no carbon monoxide was detected, use
746 – Carbon Monoxide Detector Activation, No CO
Last Updated on April 20, 2023