National Air Pollution Surveillance station locations

Site Selection

The selection of sites for the NAPS network is done in consultation with network agencies to meet the network objective of producing air quality data representative for the geographic area of interest. The sites in the network are selected based on the requirements for distribution, location, separation and spatial scale of representativeness. They are generally selected to represent where the population lives, plays and works. Air monitoring stations at these sites are meant to measure air quality trends over the long term and therefore are intended to have some degree of permanency. There are also stations established to characterize long range transport and trans-boundary movement of air pollutants.

Depending on the specific reasons and purpose for monitoring, some or all of the air quality criteria pollutants may be monitored. Some stations are used by jurisdictions for air quality index (AQI) reporting, other stations are used for CWS achievement determination or for trans-boundary transport monitoring or for special studies of local air pollution problems. Some of the stations are air pollution oriented but not source-specific oriented. The goal is to provide the best assessment of the air quality or of an air pollution problem, for the general population, with the most efficiency.

Site selection criteria for the CWS achievement determination monitors are outlined in "Guidance Document on Achievement Determination: Canada Wide Standards for Particulate Matter and Ozone".

The following is a map for the NAPS Network:

NAPS stations map
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