Pollutant concentrations for September 20, 2026, 8:00 pm EDT

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Pollutant concentrations for September 20, 2026, 8:00 pm EDT
Station O3 (ppb) PM2.5 (µg/m3) NO2 (ppb) SO2 (ppb) CO (ppm)
Thunder Bay 23Thunder Bay graph for O3 6Thunder Bay graph for PM2.5 4.6Thunder Bay graph for NO2    
Sault Ste. Marie 24Sault Ste. Marie graph for O3 2Sault Ste. Marie graph for PM2.5 0.7Sault Ste. Marie graph for NO2 0Sault Ste. Marie graph for SO2  
Windsor West 26Windsor West graph for O3 5Windsor West graph for PM2.5 6.3Windsor West graph for NO2 0Windsor West graph for SO2  
Windsor Downtown 27Windsor Downtown graph for O3 4Windsor Downtown graph for PM2.5 6.6Windsor Downtown graph for NO2 0Windsor Downtown graph for SO2 N/AWindsor Downtown graph for CO
Sarnia 36Sarnia graph for O3 3Sarnia graph for PM2.5 0.4Sarnia graph for NO2 0.1Sarnia graph for SO2  
Chatham 23Chatham graph for O3 4Chatham graph for PM2.5 0.8Chatham graph for NO2    
Grand Bend 31Grand Bend graph for O3 4Grand Bend graph for PM2.5 0.5Grand Bend graph for NO2    
Tiverton 20Tiverton graph for O3 3Tiverton graph for PM2.5      
London 17London graph for O3 4London graph for PM2.5 2.5London graph for NO2    
Port Stanley 14Port Stanley graph for O3 3Port Stanley graph for PM2.5 1.1Port Stanley graph for NO2    
Sudbury 19Sudbury graph for O3 2Sudbury graph for PM2.5 0.9Sudbury graph for NO2 0Sudbury graph for SO2  
Kitchener 30Kitchener graph for O3 4Kitchener graph for PM2.5 1.9Kitchener graph for NO2    
Brantford 29Brantford graph for O3 4Brantford graph for PM2.5 1.9Brantford graph for NO2    
Guelph 31Guelph graph for O3 3Guelph graph for PM2.5 1.2Guelph graph for NO2    
Parry Sound 19Parry Sound graph for O3 2Parry Sound graph for PM2.5 1.6Parry Sound graph for NO2    
Hamilton West 26Hamilton West graph for O3 4Hamilton West graph for PM2.5 9.2Hamilton West graph for NO2    
Hamilton Mountain 18Hamilton Mountain graph for O3 5Hamilton Mountain graph for PM2.5 16.1Hamilton Mountain graph for NO2 32Hamilton Mountain graph for SO2  
Milton 29Milton graph for O3 3Milton graph for PM2.5 2.5Milton graph for NO2 0Milton graph for SO2  
Hamilton Downtown 17Hamilton Downtown graph for O3 5Hamilton Downtown graph for PM2.5 13.5Hamilton Downtown graph for NO2 26.8Hamilton Downtown graph for SO2 0.27Hamilton Downtown graph for CO
Burlington 35Burlington graph for O3 3Burlington graph for PM2.5 3.8Burlington graph for NO2    
Brampton 24Brampton graph for O3 3Brampton graph for PM2.5 2.1Brampton graph for NO2    
Barrie 20Barrie graph for O3 4Barrie graph for PM2.5 2.1Barrie graph for NO2    
Oakville 27Oakville graph for O3 4Oakville graph for PM2.5 3Oakville graph for NO2    
Mississauga 26Mississauga graph for O3 3Mississauga graph for PM2.5 4.5Mississauga graph for NO2    
Toronto West 23Toronto West graph for O3 3Toronto West graph for PM2.5 6.2Toronto West graph for NO2 0Toronto West graph for SO2 0.25Toronto West graph for CO
Newmarket 25Newmarket graph for O3 4Newmarket graph for PM2.5 1.6Newmarket graph for NO2    
Toronto North 26Toronto North graph for O3 4Toronto North graph for PM2.5 2.4Toronto North graph for NO2 0Toronto North graph for SO2  
North Bay 17North Bay graph for O3 2North Bay graph for PM2.5 1.7North Bay graph for NO2    
Toronto Downtown 25Toronto Downtown graph for O3 10Toronto Downtown graph for PM2.5 7Toronto Downtown graph for NO2    
Toronto East 23Toronto East graph for O3 4Toronto East graph for PM2.5 4.9Toronto East graph for NO2    
St. Catharines 22St. Catharines graph for O3 3St. Catharines graph for PM2.5 6.6St. Catharines graph for NO2    
Dorset 19Dorset graph for O3 2Dorset graph for PM2.5      
Oshawa 22Oshawa graph for O3 3Oshawa graph for PM2.5 2Oshawa graph for NO2    
Peterborough 19Peterborough graph for O3 3Peterborough graph for PM2.5 3.1Peterborough graph for NO2    
Belleville 14Belleville graph for O3 3Belleville graph for PM2.5 6.2Belleville graph for NO2    
Kingston 16Kingston graph for O3 3Kingston graph for PM2.5 7.6Kingston graph for NO2    
Ottawa Downtown 19Ottawa Downtown graph for O3 3Ottawa Downtown graph for PM2.5 3.3Ottawa Downtown graph for NO2    
Cornwall 15Cornwall graph for O3 5Cornwall graph for PM2.5 1.6Cornwall graph for NO2    

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Note: 
Ontario 1-hour AAQC for O3 = 80 ppb
Ontario 1-hour AAQC for NO2 = 200 ppb
Ontario 1-hour AAQC for SO2 = 40 ppb
Ontario 1-hour AAQC for CO = 30 ppm

Note: The pollutant concentrations on this web page are based on automatically polled data and have not undergone final verification.

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