Ontario  Air Quality Health Index  Provincial Summary
Forecast Regions
Location and sublocations  Current Observation  Forecast Maximums  

Wednesday  Wednesday night  Thursday  
Barrie  3 Low Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
Belleville  3 Low Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
Brampton  4 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Brantford  4 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Burlington  4 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Chatham  3 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Cornwall  3 Low Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
Dorset  2 Low Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
Grand Bend  3 Low Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 
Guelph  4 Moderate Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 
Hamilton  5 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
5 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 

5 Moderate Risk 
5 Moderate Risk 
3 Low Risk 
3 Low Risk 

5 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 

Kingston  3 Low Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
Kitchener  4 Moderate Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 
London  3 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Mississauga  3 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Newmarket  4 Moderate Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
North Bay  2 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
Oakville  4 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Oshawa  3 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Ottawa  3 Low Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 

3 Low Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 

Parry Sound  2 Low Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
Petawawa  2 Low Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
Peterborough  3 Low Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
Port Stanley  3 Low Risk 
3 Low Risk 
3 Low Risk 
3 Low Risk 
Sarnia  3 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Sault Ste. Marie  1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
St. Catharines  3 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
Sudbury  1 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
Thunder Bay  2 Low Risk 
2 Low Risk 
2 Low Risk 
2 Low Risk 
Tiverton  3 Low Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
Toronto  4 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
4 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 

3 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 

3 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 

4 Moderate Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 

Windsor  2 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
2 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 

2 Low Risk 
4 Moderate Risk 
3 Low Risk 
3 Low Risk 
1. Forecast issued at: 6:00 AM EDT Wednesday 24 May 2017