Worst air pollution Rosedale Golf Club - Toronto, today and tomorrow
Today (9 August): Air quality in Rosedale Golf Club is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 36.8/100).
Tomorrow (10 August 2026): Air quality in Rosedale Golf Club is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 31.8/100). 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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Rosedale Golf Club air quality reflects its deep downtown Toronto ravine position along Mud Creek, with the ravine's tree cover providing some shelter from surrounding city traffic emissions. The wider Toronto urban airshed contributes background ozone and particulates, particularly on hot, calm summer afternoons when pollution tends to settle over the city.
Today - 9 August | Pollution peaks at 09:00
AQI:
Fair
36.8/100
PM2.5 (fine particles):
Good
6.1/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
1.7/100
O3 (ozone):
Fair
36.8/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.7/100
PM1 (ultrafine particles):
Good
4.8/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 12:00
AQI:
Fair
31.8/100
PM2.5 (fine particles):
Good
5.9/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Good
1.8/100
O3 (ozone):
Fair
31.8/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Good
4.2/100
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Frequently Asked Questions
Is air quality bad in Rosedale Golf Club right now?
On 9 August 2026, overall air quality in Rosedale Golf Club is fair. AQI is the main air quality indicator at 36.8/100. Pollution peaks around 9:00 AM (O3: 36.8/100).
Will air quality be worse tomorrow in Rosedale Golf Club?
On 10 August 2026, air quality conditions in Rosedale Golf Club will be similar to today, with AQI forecast at fair at 31.8/100. Pollution peaks around 12:00 PM (O3: 31.8/100).
When is air pollution at its worst in Rosedale Golf Club?
Golfers occasionally notice hazier conditions on hot, still summer afternoons, when city ozone and ragweed pollen settle over the ravine. The deep tree cover offers some shelter, but calm, humid days are when sensitive golfers may want to plan around midday heat. Mornings tend to be clearest.
Are air quality levels in Rosedale Golf Club 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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