At what concentration in parts per million (ppm) does an incident become a Level (1) Carbon Monoxide hazmat event?

A Level (1) Carbon Monoxide hazmat event is defined based on specific concentration thresholds that indicate the potential hazard posed by carbon monoxide exposure. The concentration that qualifies as a Level (1) incident is 150 parts per million (ppm). At this level, the risk of harmful health effects in individuals increases, particularly among sensitive populations such as those with pre-existing health conditions or vulnerable groups like children and the elderly.

Understanding these levels is critical in emergency management and response because it helps determine the appropriate level of resources required for safety measures, monitoring, evacuation, or treatment. The significance of recognizing different concentration levels lies in ensuring that responders can effectively address the potential dangers posed by carbon monoxide and protect both the public and personnel involved in the incident.