Worst air pollution Calgary, today and tomorrow
Today (16 July): Air quality in Calgary is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 35.5/100).
Tomorrow (17 July 2026): Air quality in Calgary is fair. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 9:00 AM (O3: 48.7/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Calgary's air quality is shaped by frequent winter Chinook winds that disperse pollutants quickly, though summer wildfire smoke drifting from BC and vehicle traffic on Deerfoot Trail remain notable local sources.
Today - 16 July | Pollution peaks at 07:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
11.8/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Fair
22.1/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.3/100
PM1 (ultrafine particles):
Good
11.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 09:00
AQI:
Medium
48.7/100
PM2.5 (fine particles):
Good
15.5/100
PM10 (coarse particles):
Good
5.0/100
NO2 (nitrogen dioxide):
Fair
21.6/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
4.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Good
15.8/100
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Frequently Asked Questions
Is air quality bad in Calgary right now?
On 16 July 2026, overall air quality in Calgary is fair. AQI is the main air quality indicator at 35.5/100. Pollution peaks around 7:00 AM (O3: 35.5/100).
Will air quality be worse tomorrow in Calgary?
On 17 July 2026, air quality conditions in Calgary will be similar to today, with NO2 forecast at fair at 21.6/100. Pollution peaks around 9:00 AM (O3: 48.7/100).
When is air pollution at its worst in Calgary?
Calgary's air quality follows a seasonal rhythm tied to its position on the prairie at the foot of the Rocky Mountains. Winter's sudden chinook winds can melt snow and clear the air within hours, while summer heat and wildfire smoke drifting from the Rockies occasionally push pollution higher. These warm winter winds are one of the most distinctive features of the local climate.
Are air quality levels in Calgary based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app