Back to Alliston Sector 46 Main Forecast
Alliston Sector 46 Air Quality Health Index (AQHI)
Health Canada & Environment and Climate Change Canada official environmental metrics
Current Air Quality Category
4
Moderate Risk
Canadian AQHI Scale (1 to 10+)
No need to modify usual outdoor activities unless you experience symptoms such as coughing or throat irritation.
At-Risk Population
Enjoy your usual outdoor activities. Ideal conditions for individuals with heart or breathing issues.
General Population
Ideal air quality for outdoor sports, recreation, and work in Alliston Sector 46.
Fine Particulate (PM2.5)
2.8 µg/m³
Well below health threshold
Particulate Matter (PM10)
2.8 µg/m³
Normal background levels
Ground-Level Ozone (O3)
74 ppb
Photochemical balance
Nitrogen Dioxide (NO2)
0 ppb
Traffic emission index