FLCN21 CWTO 242045
AIR QUALITY HEALTH INDEX FORECAST FOR ONTARIO ISSUED JOINTLY BY
ENVIRONMENT CANADA AND THE PROVINCE OF ONTARIO AT 5:00 P.M. EDT
SUNDAY 24 MAY 2026 FOR TONIGHT MONDAY AND TUESDAY.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 6:00 A.M. EDT MONDAY.

TORONTO
TORONTO DOWNTOWN
TORONTO EAST.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

TORONTO NORTH
TORONTO WEST
BURLINGTON
OAKVILLE
MISSISSAUGA
BRAMPTON.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

WINDSOR
WINDSOR DOWNTOWN
WINDSOR WEST.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

CHATHAM
PORT STANLEY
LONDON
GRAND BEND.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

SARNIA.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK.

TIVERTON.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

BRANTFORD
KITCHENER
GUELPH
MILTON.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

ST. CATHARINES
HAMILTON
HAMILTON DOWNTOWN
HAMILTON MOUNTAIN
HAMILTON WEST.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

OSHAWA.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

NEWMARKET.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

BARRIE.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.

PETERBOROUGH.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

DORSET.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 1 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.

PARRY SOUND.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

BELLEVILLE.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

KINGSTON.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

CORNWALL.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK.

OTTAWA
GATINEAU.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 1 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.

NORTH BAY
SUDBURY
SAULT STE. MARIE
THUNDER BAY.
TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
MONDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK.
TUESDAY..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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