Worst air pollution Downtown Lethbridge - Lethbridge, today and tomorrow
Today (9 August): Air quality in Downtown Lethbridge is fair. O3 is fair; AQI and NO2 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (NO2: 53.9/100).
Tomorrow (10 August 2026): Air quality in Downtown Lethbridge is fair. All pollutants stay as today. Pollution peaks around 5:00 PM (NO2: 44.6/100). 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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Downtown Lethbridge's air quality benefits from near-constant prairie winds sweeping through the coulees, with Highway 3 traffic through downtown the primary local source.
Today - 9 August | Pollution peaks at 13:00
AQI:
Medium
53.9/100
PM2.5 (fine particles):
Good
19.9/100
PM10 (coarse particles):
Good
7.3/100
NO2 (nitrogen dioxide):
Medium
53.9/100
O3 (ozone):
Fair
39.0/100
SO2 (sulfur dioxide):
Good
17.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.0/100
PM1 (ultrafine particles):
Good
16.9/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 17:00
AQI:
Medium
44.6/100
PM2.5 (fine particles):
Good
17.5/100
PM10 (coarse particles):
Good
6.7/100
NO2 (nitrogen dioxide):
Medium
44.6/100
O3 (ozone):
Fair
23.3/100
SO2 (sulfur dioxide):
Good
11.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.1/100
PM1 (ultrafine particles):
Good
11.8/100
Other Landmarks in Lethbridge
Sports venues in Lethbridge
Frequently Asked Questions
Is air quality bad in Downtown Lethbridge right now?
On 9 August 2026, overall air quality in Downtown Lethbridge is fair. O3 is the main pollutant at 39.0/100. Pollution peaks around 1:00 PM (NO2: 53.9/100).
Will air quality be worse tomorrow in Downtown Lethbridge?
On 10 August 2026, air quality conditions in Downtown Lethbridge will be similar to today, with O3 forecast at fair at 23.3/100. Pollution peaks around 5:00 PM (NO2: 44.6/100).
When is air pollution at its worst in Downtown Lethbridge?
Air quality in Downtown Lethbridge shifts noticeably across the seasons, shaped by its coulee-swept core along Highway 3. 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 Downtown Lethbridge 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: 10 August 2026 at 02:34 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.
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