FLCN21 CWTO 192045
AIR QUALITY HEALTH INDEX FORECAST FOR ONTARIO ISSUED JOINTLY BY
ENVIRONMENT CANADA AND THE PROVINCE OF ONTARIO AT 5:00 P.M. EDT
THURSDAY 19 MARCH 2026 FOR TONIGHT FRIDAY AND SATURDAY.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 6:00 A.M. EDT FRIDAY.

TORONTO
TORONTO DOWNTOWN
TORONTO EAST
TORONTO NORTH
TORONTO WEST
MISSISSAUGA
BRAMPTON.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK.

WINDSOR
WINDSOR DOWNTOWN
WINDSOR WEST.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

CHATHAM
SARNIA
PORT STANLEY
LONDON
GRAND BEND
TIVERTON.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

BRANTFORD
KITCHENER
GUELPH
ST. CATHARINES
HAMILTON
HAMILTON DOWNTOWN
HAMILTON MOUNTAIN
HAMILTON WEST
BURLINGTON
OAKVILLE
MILTON.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

OSHAWA.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

NEWMARKET.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

BARRIE.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.

PETERBOROUGH
DORSET
PARRY SOUND
BELLEVILLE
NORTH BAY
SUDBURY.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.

KINGSTON
CORNWALL
OTTAWA
GATINEAU.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.

SAULT STE. MARIE
THUNDER BAY.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
FRIDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
FRIDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
SATURDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 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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