Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs
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2022 Annual Regional Air Quality Index Statistics

The Air Quality Index (AQI) was calculated in 2022 for 24 weather regions, the Island of Montréal being divided into four sub-regions.

The percentage of days in which the AQI was deemed “good” or “acceptable” varied from 96% in the Île de Montréal - East sub-region (350/365) to 100% for the Mont-Laurier, Lac-Saint-Jean, Laurentides, Témiscouata, Rivière-du-Loup, Montmagny, Beauce, Québec and Estrie regions.

The Île de Montréal - East sub-region, located in Montréal, was where air quality was most often “poor*”, with a proportion of 4% (15/365 days). The result was slightly better than in 2021, where the proportion was 5%.

In overall terms, the respective AQI “good,” “acceptable” and “poor” proportions were 62%, 37% and 1%. Compared to 2021, the proportion of results in the “acceptable” category increased by 1%, while for the “poor” category there was a decrease of 1%.

*Occurs when the concentration of at least one of the contaminants used to calculate the AQI exceeds its hourly reference value at one or more of the region’s measuring stations.


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