Ontario air quality index (AQI) and PM2.5 air pollution

 (local time)
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Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
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Ontario air pollution by cities

Ajax Algoma Amherstburg Ancaster Angus Arnprior Atikokan Aylmer Bancroft Barrie Belleville Bells Corners Binbrook Bluewater Bonner Lake Bourget Bracebridge Brampton Brant Brantford Brockville Burlington Cambridge Camlachie Carleton Place Casselman Chatham Clarence-Rockland Cobourg Collingwood Concord Cornwall Deep River Delaware Deseronto Dorchester Dorset Dryden Ear Falls East York Egbert Elliot Lake Englehart Espanola Etobicoke Experimental Lakes Fort Erie Fort Frances Gananoque Goderich Grand Bend Gravenhurst Greater Napanee Greenstone Guelph Hamilton Hanover Hawkesbury Hearst Hornepayne Huntsville Huron East Ingersoll Innisfil Iroquois Falls Kapuskasing Keswick Kincardine Kingston Kirkland Lake Kitchener Lambton Shores Lindsay Little Current London Marathon Markham Mattawa Midland Milton Mississauga Morrisburg Napanee Downtown Neebing Nepean Newmarket Niagara Falls Norfolk County North Bay North Perth North York Oakville Omemee Orangeville Orillia Oshawa Ottawa Owen Sound Paris Parry Sound Pembroke Perth Petawawa Peterborough Petrolia Pickering Pickle Lake Picton Port Colborne Port Stanley Powassan Prescott Prince Edward Quinte West Rayside-Balfour Red Lake Renfrew Richmond Hill Sarnia Sault Ste Marie Scarborough Shelburne Simcoe Skatepark Smiths Falls South Huron South River St. Catharines St. Thomas Stratford Sudbury Temiskaming Shores Thessalon Thorold Thunder Bay Timmins Tiverton Tobermory Toronto Uxbridge Vaughan Walpole Island Wasaga Beach Waterloo Welland Wendover Willowdale Windsor Wingham Woodstock

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