Ambient air is the air that exists in the atmosphere, what we call outdoor air. It's monitored to understand if there's air quality concerns and what actions can be taken to support clean air.
Ambient Air Quality Monitoring Network
There are 3 Provincial ambient air quality monitoring stations that measure air contaminants and calculate the provincial air quality health index (AQHI). These stations are managed by Alberta Environment. Alberta Environment also operates a fourth station that measures only particulate matter (Edmonton McIntyre).
There are also 6 industry-operated stations that are situated around industrial areas in the east and west areas of the City. These stations monitor air quality contaminant concentrations that are specific to the provincial approvals that relate to each of the industrial operators.