Air quality in Ontario

Air quality index (AQI) and PM2.5 air pollution in Ontario

Last update at (local time)

LIVE AQI CITY RANKING

Real-time Ontario
Most polluted city ranking

#cityUS AQI
1 Milton

66

2 Brantford

65

3 Innisfil

65

4 Hamilton

64

5 Grand Bend

63

6 London

63

7 Windsor

63

8 Cambridge

62

9 Niagara on the Lake

59

10 Orillia

59

(local time)

SEE WORLD AQI RANKING

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88 Contributors

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LIVE AQI CITY RANKING

Real-time Ontario
Cleanest city ranking

#cityUS AQI
1 Kirkland Lake

16

2 Sioux Narrows

18

3 Thunder Bay

19

4 Timmins

26

5 Belleville

31

6 Parry Sound

33

7 St. Catharines

35

8 Brockville

37

9 Coldwater

37

10 Dorset

37

(local time)

SEE WORLD AQI RANKING

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