Ontario - Air Quality Health Index - Summary

AQHIScale
Forecast Regions

This table shows a summary of current Air Quality Health Index values and forecast maximums1
Location and sub-locations Observed Conditions Forecast Maximums
Tuesday Tuesday night Wednesday Wednesday night
Barrie 2
Low Risk		 3
Low Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
Belleville 1
Low Risk		 3
Low Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
Brampton 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Brantford 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Burlington 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Chatham 3
Low Risk		 4
Moderate Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
Cornwall 1
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk
Dorset 1
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk
Grand Bend 3
Low Risk		 4
Moderate Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
Guelph 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Hamilton 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Kingston 1
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk
Kitchener 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
London 3
Low Risk		 4
Moderate Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
Milton 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Mississauga 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Newmarket 3
Low Risk		 3
Low Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
North Bay 1
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk
Oakville 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Oshawa 3
Low Risk		 3
Low Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
Ottawa 1
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk
Parry Sound 2
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk
Peterborough 2
Low Risk		 3
Low Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
Port Stanley 3
Low Risk		 4
Moderate Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
Sarnia 3
Low Risk		 4
Moderate Risk		 3
Low Risk		 2
Low Risk		 2
Low Risk
Sault Ste. Marie 1
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk
St. Catharines 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Sudbury 1
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk		 2
Low Risk
Thunder Bay 1
Low Risk		 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		 2
Low Risk
Toronto 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
Windsor 3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
3
Low Risk		 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk
N/A 4
Moderate Risk		 4
Moderate Risk		 2
Low Risk		 2
Low Risk

1. Forecast issued at: 6:00 AM EDT Tuesday 13 October 2026

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