Worst air pollution Walkerton, today and tomorrow
Today (9 August): Air quality in Walkerton is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 38.2/100).
Tomorrow (10 August 2026): Air quality in Walkerton is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 33.1/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Walkerton's air quality benefits from its inland southwestern Ontario Saugeen River valley position, with vehicle traffic on Highway 9 the primary local source amid generally good rural wind dispersal.
Today - 9 August | Pollution peaks at 08:00
AQI:
Fair
38.2/100
PM2.5 (fine particles):
Good
6.4/100
PM10 (coarse particles):
Good
3.6/100
NO2 (nitrogen dioxide):
Good
2.3/100
O3 (ozone):
Fair
38.2/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.9/100
PM1 (ultrafine particles):
Good
5.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 12:00
AQI:
Fair
33.1/100
PM2.5 (fine particles):
Good
6.2/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Good
1.7/100
O3 (ozone):
Fair
33.1/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.0/100
PM1 (ultrafine particles):
Good
4.8/100
Pollen forecast in Walkerton
View pollen forecastFrequently Asked Questions
Is air quality bad in Walkerton right now?
On 9 August 2026, overall air quality in Walkerton is fair. AQI is the main air quality indicator at 38.2/100. Pollution peaks around 8:00 AM (O3: 38.2/100).
Will air quality be worse tomorrow in Walkerton?
On 10 August 2026, air quality conditions in Walkerton will be similar to today, with AQI forecast at fair at 33.1/100. Pollution peaks around 12:00 PM (O3: 33.1/100).
When is air pollution at its worst in Walkerton?
Walkerton sees clear seasonal swings in air quality, driven in part by the farmland of Bruce County. Spring planting and fall harvest can raise dust levels briefly, while summer heat occasionally pushes up ground-level ozone; winter usually brings the cleanest, calmest air of the year. Wind can carry dust well beyond the fields themselves during the busiest planting and harvest weeks.
Are air quality levels in Walkerton 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.
Check air quality in other popular cities:
Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Get the full experience in the Airmine app.