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Palliser Airshed Society


The Palliser Airshed Society (PAS) is the sixth airshed management zone set-up in the Province of Alberta and the first airshed formed in Southern Alberta. The Palliser Airshed was developed to monitor the air quality in the Medicine Hat and Redcliff region. With the potential for further development in the area, this airshed will collect and communicate relevant air quality data that can be used when considering future planned projects.

Prior to the formation of the Palliser Airshed Society, the City of Medicine Hat had been performing some ambient air quality monitoring. With the inception of PAS, the air monitoring zone was increased to approximately 150 square kilometers, containing a population of about 53,000 people. Also, with the formation of PAS, the airshed has increased its monitoring abilities to include 6 Passive Monitoring sites and one air monitoring trailer; housing continuous monitors to analyze for NO2, O3, THC, meteorological parameters, and particulate matter (PM2.5). The information collected from the continuous samplers is presented to the public through this webpage in a real-time format.

In 2006, the Palliser Airshed zone expanded its borders. The airshed now encompasses approximately 40,000 km2, and includes a population of about 100,000 people. The final borders of the airshed were determined by the Palliser Health Authority boundaries. A monitoring plan was developed based on the expansion and additions to the existing monitoring program include a portable monitoring station that is intended to relocate every six months and a 20 station passive network.

In 2011 the Palliser Airshed Society expanded their borders again. The southwest border of the airshed was expanded to Highway 4 and Highway 36 to include communities such as Vauxhall, Warner and Milk River. In this year a rover station was set up at Hays to begin the monitoring program in the new west expansion, as well as the addition of two passive sites in this area. The Palliser Airshed Society decommissioned the Hays rover station in October 2011, due to financial challenges.

The Palliser Airshed Society is a non-profit society with a volunteer Board of Directors with representatives in the society from the agriculture, industry, government, health authority, municipalities, environmental non-government organizations, and general public sectors. Funding for the society is generated by contributions from the stakeholder membership, with the amounts based upon the company’s, or municipality’s, contribution to the air pollution in the area. Other funding is generated through in-kind and monetary donations.



Palliser Airshed Society