Back to Markham Sector 48 Main Forecast
Markham Sector 48 Air Quality Health Index (AQHI)
Health Canada & Environment and Climate Change Canada official environmental metrics
Current Air Quality Category
7
High Risk
Canadian AQHI Scale (1 to 10+)
Reduce or reschedule strenuous activities outdoors. Children and elderly should take precautions.
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 Markham Sector 48.
Fine Particulate (PM2.5)
8.8 µg/m³
Well below health threshold
Particulate Matter (PM10)
9 µg/m³
Normal background levels
Ground-Level Ozone (O3)
89 ppb
Photochemical balance
Nitrogen Dioxide (NO2)
20 ppb
Traffic emission index