Calgary - Percent Air Quality Hours

Percentage of hours at a given air quality level. The Air Quality Health Index (AQHI) is calculated based on the relative risks of a combination of common air pollutants that is known to harm human health. These pollutants are: Ozone (O3) at ground level, Particulate Matter (PM2.5/PM10), and Nitrogen Dioxide (NO2). Risks are defined as follows: 1-3 High Quality, 4-6 Moderate Quality, 7-9 Low Quality, 10+ Very Low Quality

Calgary air quality was high for 0.72% of reported hours in 2023, precipitously declining -98.6% from 52.1% in 2022. The 9 segment had the largest increase over last year, increasing 2,218% to 0.26%.

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Calgary
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Percent Air Quality Hours

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Source Attribution

View this dataset on the Alberta Open Government Website

Calgary - Percent Air Quality Hours

Percent Air Quality Hours

Source Attribution

Last Updated - May 13, 2025