FLCN21 CWTO 240945 AIR QUALITY HEALTH INDEX FORECAST FOR ONTARIO ISSUED JOINTLY BY ENVIRONMENT CANADA AND THE PROVINCE OF ONTARIO AT 6:00 A.M. EDT TUESDAY 24 MARCH 2026 FOR TODAY AND WEDNESDAY. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 P.M. EDT. TORONTO. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TORONTO DOWNTOWN. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TORONTO EAST. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TORONTO NORTH. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TORONTO WEST. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WINDSOR. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WINDSOR DOWNTOWN. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WINDSOR WEST. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. CHATHAM. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. SARNIA. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. PORT STANLEY. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. LONDON. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. GRAND BEND. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TIVERTON. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. BRANTFORD. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. KITCHENER. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. GUELPH. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. ST. CATHARINES. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. HAMILTON. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. HAMILTON DOWNTOWN. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. HAMILTON MOUNTAIN. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. HAMILTON WEST. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. BURLINGTON. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. OAKVILLE. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. MILTON. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. MISSISSAUGA. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. BRAMPTON. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. OSHAWA. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. NEWMARKET. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. BARRIE. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. PETERBOROUGH. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. DORSET. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. PARRY SOUND. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. BELLEVILLE. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. KINGSTON. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. CORNWALL. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. OTTAWA. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. GATINEAU. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. NORTH BAY. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. SUDBURY. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 4 OR MODERATE RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. SAULT STE. MARIE. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 2 OR LOW RISK. WEDNESDAY NIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. THUNDER BAY. TODAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. TONIGHT..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY..MAXIMUM AIR QUALITY HEALTH INDEX 3 OR LOW RISK. WEDNESDAY NIGHT..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 END