The Toronto West AQHI station will experience a temporary interruption in public data reporting from Friday, April 10 to Sunday, April 12 due to scheduled maintenance activities. Air quality information from other Toronto monitoring stations will remain available.
Choose date options.
| Station | O3 (ppb) | PM2.5 (µg/m3) | NO2 (ppb) | SO2 (ppb) | CO (ppm) |
|---|---|---|---|---|---|
| Barrie | 28 |
3 |
3 |
||
| Belleville | 30 |
3 |
3.3 |
||
| Brampton | 26 |
4 |
6.3 |
||
| Brantford | 27 |
4 |
9.7 |
||
| Burlington | 20 |
6 |
16.6 |
||
| Chatham | 16 |
3 |
7.2 |
||
| Cornwall | 33 |
5 |
3.4 |
||
| Dorset | 29 |
2 |
|||
| Grand Bend | 26 |
4 |
1.8 |
||
| Guelph | 29 |
3 |
3.1 |
||
| Hamilton Downtown | 14 |
8 |
19 |
9.4 |
0.26 |
| Hamilton Mountain | 18 |
6 |
14.9 |
10.2 |
|
| Hamilton West | 17 |
6 |
20.3 |
||
| Kingston | 29 |
6 |
3.6 |
||
| Kitchener | 26 |
3 |
6.1 |
||
| London | 21 |
6 |
7.7 |
||
| Milton | 22 |
5 |
11 |
0.2 |
|
| Mississauga | 15 |
5 |
22.1 |
||
| Newmarket | 28 |
4 |
3.9 |
||
| North Bay | 28 |
3 |
1.3 |
||
| Oakville | 18 |
5 |
18.5 |
||
| Oshawa | 30 |
3 |
1.4 |
||
| Ottawa Downtown | 29 |
3 |
4.5 |
||
| Parry Sound | 21 |
4 |
6.9 |
||
| Peterborough | 27 |
3 |
3 |
||
| Port Stanley | 42 |
14 |
5.2 |
||
| Sarnia | 27 |
4 |
2.1 |
0 |
|
| Sault Ste. Marie | 33 |
3 |
5.4 |
0.1 |
|
| St. Catharines | 33 |
4 |
3.3 |
||
| Sudbury | 33 |
3 |
3.2 |
0.1 |
|
| Thunder Bay | 38 |
6 |
3.9 |
||
| Tiverton | 29 |
3 |
|||
| Toronto Downtown | 19 |
6 |
24 |
||
| Toronto East | 22 |
4 |
13.6 |
||
| Toronto North | 26 |
5 |
5.2 |
0.1 |
|
| Toronto West | N/A |
N/A |
N/A |
N/A |
N/A |
| Windsor Downtown | 20 |
5 |
16.3 |
0 |
0.3 |
| Windsor West | 15 |
5 |
16.8 |
0 |
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.
