Worst air pollution Calgary Tower - Calgary, today and tomorrow
Today (20 September): Air quality in Calgary Tower is very poor. AQI and NO2 are very poor; PM2.5 is moderate; PM10 and O3 are fair; SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (NO2: 100/100).
Tomorrow (21 September 2026): Air quality in Calgary Tower is very poor. All pollutants stay as today. Pollution peaks around 1:00 PM (NO2: 100/100). 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 Tower's air quality reflects downtown Calgary's dense core, with Centre Street traffic contributing background emissions, though the elevated observation deck sits above street-level pollution.
Today - 20 September | Pollution peaks at 15:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Moderate
48.2/100
PM10 (coarse particles):
Fair
30.6/100
NO2 (nitrogen dioxide):
Very poor
100/100
O3 (ozone):
Fair
21.5/100
SO2 (sulfur dioxide):
Good
6.0/100
CO (carbon monoxide):
Good
1.3/100
HCHO (formaldehyde):
Good
10.3/100
PM1 (ultrafine particles):
Good
19.4/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 13:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Moderate
49.7/100
PM10 (coarse particles):
Fair
34.3/100
NO2 (nitrogen dioxide):
Very poor
100/100
O3 (ozone):
Fair
27.8/100
SO2 (sulfur dioxide):
Good
7.1/100
CO (carbon monoxide):
Good
1.4/100
HCHO (formaldehyde):
Good
11.3/100
PM1 (ultrafine particles):
Good
17.1/100
Other Landmarks in Calgary
Sports venues in Calgary
Frequently Asked Questions
Is air quality bad in Calgary Tower right now?
On 20 September 2026, overall air quality in Calgary Tower is very poor. AQI is the main air quality indicator at 100/100. Pollution peaks around 3:00 PM (NO2: 100/100).
Will air quality be worse tomorrow in Calgary Tower?
On 21 September 2026, air quality conditions in Calgary Tower will be similar to today, with AQI forecast at very poor at 100/100. Pollution peaks around 1:00 PM (NO2: 100/100).
When is air pollution at its worst in Calgary Tower?
Air quality at Calgary Tower shifts noticeably across the seasons, shaped by its downtown observation deck rising above Centre Street traffic. 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 Tower 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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