Ontario Air Quality Index (AQI) | Air Pollution
Real-time PM2.5, PM10 air pollution level in Ontario
Check the air quality level of thecities in Ontario
Ontario
Ontario's Cities
Real-time Air Pollution Level
Canada's Metro Cities
Air Quality Index
Most Polluted Cities 2026
Canada
Analyze the real-time most air polluted cities in the country.
Standard Value
1.
Fort St John, British Columbia
Unhealthy
6xabove Standard
2.
Prince George, British Columbia
Unhealthy
5xabove Standard
3.
Windsor, Ontario
Poor
3xabove Standard
4.
Chatham, Ontario
Poor
2xabove Standard
5.
Whitehorse, Yukon
Moderate
3xabove Standard
6.
Grande Prairie, Alberta
Moderate
1xequal Standard
7.
Lethbridge, Alberta
Moderate
2xabove Standard
8.
Yellowknife, Northwest Territories
Moderate
2xabove Standard
9.
Fort McKay, Alberta
Moderate
2xabove Standard
10.
Sault Ste. Marie, Ontario
Moderate
2xabove Standard
Last Updated: 19 Jul 2026, 10:06 PM
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