Pollutant Concentrations for June 12, 2025, 1:00 am EDT

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Air Pollutant 1-Hour Concentrations For June 12, 2025, 1:00 am EDT
Station O3 (ppb) PM2.5 (µg/m3) NO2 (ppb) SO2 (ppb) CO (ppm)
53
Barrie graph for O3
25
Barrie graph for PM2.5
1.4
Barrie graph for NO2
   
57
Belleville graph for O3
14
Belleville graph for PM2.5
7.3
Belleville graph for NO2
   
60
Brampton graph for O3
24
Brampton graph for PM2.5
1.8
Brampton graph for NO2
   
54
Brantford graph for O3
22
Brantford graph for PM2.5
1.7
Brantford graph for NO2
   
47
Burlington graph for O3
19
Burlington graph for PM2.5
11.4
Burlington graph for NO2
   
48
Chatham graph for O3
18
Chatham graph for PM2.5
4.2
Chatham graph for NO2
   
63
Cornwall graph for O3
22
Cornwall graph for PM2.5
1.1
Cornwall graph for NO2
   
50
Dorset graph for O3
24
Dorset graph for PM2.5
     
61
Grand Bend graph for O3
26
Grand Bend graph for PM2.5
0.8
Grand Bend graph for NO2
   
58
Guelph graph for O3
24
Guelph graph for PM2.5
1.3
Guelph graph for NO2
   
55
Hamilton Downtown graph for O3
21
Hamilton Downtown graph for PM2.5
4.4
Hamilton Downtown graph for NO2
0.8
Hamilton Downtown graph for SO2
0.29
Hamilton Downtown graph for CO
50
Hamilton Mountain graph for O3
23
Hamilton Mountain graph for PM2.5
3
Hamilton Mountain graph for NO2
0.9
Hamilton Mountain graph for SO2
 
53
Hamilton West graph for O3
19
Hamilton West graph for PM2.5
4.6
Hamilton West graph for NO2
   
60
Kingston graph for O3
19
Kingston graph for PM2.5
1.9
Kingston graph for NO2
   
55
Kitchener graph for O3
25
Kitchener graph for PM2.5
1.9
Kitchener graph for NO2
   
58
London graph for O3
24
London graph for PM2.5
2.8
London graph for NO2
   
57
Milton graph for O3
26
Milton graph for PM2.5
3.4
Milton graph for NO2
0.3
Milton graph for SO2
 
60
Mississauga graph for O3
23
Mississauga graph for PM2.5
2.8
Mississauga graph for NO2
   
53
Newmarket graph for O3
27
Newmarket graph for PM2.5
2.3
Newmarket graph for NO2
   
44
North Bay graph for O3
25
North Bay graph for PM2.5
1.1
North Bay graph for NO2
   
58
Oakville graph for O3
25
Oakville graph for PM2.5
2.9
Oakville graph for NO2
   
61
Oshawa graph for O3
25
Oshawa graph for PM2.5
1.6
Oshawa graph for NO2
   
28
Ottawa Downtown graph for O3
13
Ottawa Downtown graph for PM2.5
2.4
Ottawa Downtown graph for NO2
   
45
Parry Sound graph for O3
25
Parry Sound graph for PM2.5
0.9
Parry Sound graph for NO2
   
59
Peterborough graph for O3
23
Peterborough graph for PM2.5
1.4
Peterborough graph for NO2
   
50
Port Stanley graph for O3
22
Port Stanley graph for PM2.5
5
Port Stanley graph for NO2
   
65
Sarnia graph for O3
27
Sarnia graph for PM2.5
1.7
Sarnia graph for NO2
0.1
Sarnia graph for SO2
 
27
Sault Ste. Marie graph for O3
21
Sault Ste. Marie graph for PM2.5
2.3
Sault Ste. Marie graph for NO2
0
Sault Ste. Marie graph for SO2
 
59
St. Catharines graph for O3
17
St. Catharines graph for PM2.5
2.5
St. Catharines graph for NO2
   
30
Sudbury graph for O3
29
Sudbury graph for PM2.5
1.5
Sudbury graph for NO2
0.5
Sudbury graph for SO2
 
26
Thunder Bay graph for O3
3
Thunder Bay graph for PM2.5
0.8
Thunder Bay graph for NO2
   
47
Tiverton graph for O3
29
Tiverton graph for PM2.5
     
57
Toronto Downtown graph for O3
29
Toronto Downtown graph for PM2.5
5.1
Toronto Downtown graph for NO2
   
54
Toronto East graph for O3
26
Toronto East graph for PM2.5
3.9
Toronto East graph for NO2
   
57
Toronto North graph for O3
27
Toronto North graph for PM2.5
4.7
Toronto North graph for NO2
0.4
Toronto North graph for SO2
 
54
Toronto West graph for O3
27
Toronto West graph for PM2.5
7.5
Toronto West graph for NO2
0.2
Toronto West graph for SO2
0.35
Toronto West graph for CO
46
Windsor Downtown graph for O3
26
Windsor Downtown graph for PM2.5
14.5
Windsor Downtown graph for NO2
0.7
Windsor Downtown graph for SO2
0.42
Windsor Downtown graph for CO
35
Windsor West graph for O3
28
Windsor West graph for PM2.5
28
Windsor West graph for NO2
2
Windsor West graph for SO2
 

Order by Station Location (East to West)

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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