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Air Quality Health Index for Ontario


* NOTE: Corrected and/or amended bulletins are listed first *

 
FLCN21 CWTO 172100
Air Quality Health Index forecast for Ontario issued jointly by
Environment Canada and the Province of Ontario at 5:00 p.m. EDT
Friday 17 May 2024 for tonight Saturday and Sunday.
The next scheduled forecast will be issued at 6:00 a.m. EDT Saturday.

Toronto
Toronto East
Toronto North
Toronto West
St. Catharines
Burlington
Oakville
Milton
Mississauga
Brampton
Newmarket.
Tonight..Maximum Air Quality Health Index 3 or low risk.
Saturday..Maximum Air Quality Health Index 3 or low risk.
Saturday night..Maximum Air Quality Health Index 3 or low risk.
Sunday..Maximum Air Quality Health Index 4 or moderate risk.

Toronto Downtown
Hamilton
Hamilton Downtown
Hamilton Mountain
Hamilton West.
Tonight..Maximum Air Quality Health Index 4 or moderate risk.
Saturday..Maximum Air Quality Health Index 3 or low risk.
Saturday night..Maximum Air Quality Health Index 3 or low risk.
Sunday..Maximum Air Quality Health Index 4 or moderate risk.

Windsor
Windsor Downtown
Windsor West.
Tonight..Maximum Air Quality Health Index 3 or low risk.
Saturday..Maximum Air Quality Health Index 4 or moderate risk.
Saturday night..Maximum Air Quality Health Index 4 or moderate risk.
Sunday..Maximum Air Quality Health Index 5 or moderate risk.

Chatham
Port Stanley
London.
Tonight..Maximum Air Quality Health Index 3 or low risk.
Saturday..Maximum Air Quality Health Index 4 or moderate risk.
Saturday night..Maximum Air Quality Health Index 4 or moderate risk.
Sunday..Maximum Air Quality Health Index 5 or moderate risk.

Sarnia
Grand Bend.
Tonight..Maximum Air Quality Health Index 3 or low risk.
Saturday..Maximum Air Quality Health Index 4 or moderate risk.
Saturday night..Maximum Air Quality Health Index 4 or moderate risk.
Sunday..Maximum Air Quality Health Index 6 or moderate risk.

Tiverton
Barrie
Peterborough
Dorset
Parry Sound
North Bay
Sudbury.
Tonight..Maximum Air Quality Health Index 3 or low risk.
Saturday..Maximum Air Quality Health Index 3 or low risk.
Saturday night..Maximum Air Quality Health Index 3 or low risk.
Sunday..Maximum Air Quality Health Index 4 or moderate risk.

Brantford
Kitchener
Guelph.
Tonight..Maximum Air Quality Health Index 3 or low risk.
Saturday..Maximum Air Quality Health Index 4 or moderate risk.
Saturday night..Maximum Air Quality Health Index 4 or moderate risk.
Sunday..Maximum Air Quality Health Index 4 or moderate risk.

Oshawa
Belleville
Kingston
Cornwall
Ottawa
Gatineau
Sault Ste. Marie.
Tonight..Maximum Air Quality Health Index 3 or low risk.
Saturday..Maximum Air Quality Health Index 3 or low risk.
Saturday night..Maximum Air Quality Health Index 3 or low risk.
Sunday..Maximum Air Quality Health Index 3 or low risk.

Thunder Bay.
Tonight..Maximum Air Quality Health Index 2 or low risk.
Saturday..Maximum Air Quality Health Index 2 or low risk.
Saturday night..Maximum Air Quality Health Index 2 or low risk.
Sunday..Maximum Air Quality Health Index 3 or low risk.

Air Quality Health Index Scale:
1-3  Low health risk
4-6  Moderate health risk
7-10 High health risk
Above 10 Very high health risk

For more information, consult www.airhealth.ca

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