Ministère de l'Environnement
et de la Lutte contre les changements climatiques

2015 Annual Regional Air Quality Index Statistics

The Air Quality Index (AQI) was calculated for 24 meteorological regions in 2015, with Île de Montréal subdivided into four sub-regions.

The percentage of “Good” or “Acceptable” AQI days varied from 84% on Île de Montréal (approximately 305 out of 365 days) to 100% in the Estrie, Beauce,  Québec, Haute-Gatineau, Montmagny, Laurentides and Mont-Laurier regions.

Air quality was most often “Poor” in the Île de Montréal region, with a 16% rating (60/365 days). This result was identical to observations for 2014.

Overall, the number of days when AQI was rated “Good” came to 56%, while the figures were 42% for “Acceptable” and 2% for “Poor.” These results were identical to 2014. In comparison with 2013 figures, the number of “Good” AQI days increased by 3%, while “Acceptable” days dropped by 2% and “Poor” days fell by 1%.

*This is the case when the concentration of at least one of the contaminants used to calculate the AQI exceeds the hourly reference value at a minimum of one of the regional measuring stations.

Evaluation of the page Learn more

As part of its 2019—2023 Strategic Plan, the Ministère wishes to improve access to information that is available on its website. Can we count on your co-operation by responding to a survey at the bottom of each page? This will enable us to evaluate how easy it was to find the information you were looking for.

How easy was it to find the information you were looking for today?
Easy Difficult

Return to the top