Air quality in Toronto
The US Air Quality Index (EPA) grades air from 0 to 500 using fine particles (PM2.5/PM10), ozone and nitrogen dioxide. 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and anything higher affects everyone.
PM2.5
5.3 µg/m³
WHO guideline 15
PM10
5.4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
12:00 AM
💨
PM2.5 5.3 µg/m³
25Good
1:00 AM
💨
PM2.5 5.5 µg/m³
24Good
2:00 AM
💨
PM2.5 5.6 µg/m³
23Good
3:00 AM
💨
PM2.5 5.7 µg/m³
24Good
4:00 AM
💨
PM2.5 6 µg/m³
25Good
5:00 AM
💨
PM2.5 6.2 µg/m³
26Good
6:00 AM
💨
PM2.5 6.6 µg/m³
28Good
7:00 AM
💨
PM2.5 7.1 µg/m³
30Good
8:00 AM
💨
PM2.5 7.7 µg/m³
32Good
9:00 AM
💨
PM2.5 7.6 µg/m³
32Good
10:00 AM
💨
PM2.5 7.6 µg/m³
36Good
11:00 AM
💨
PM2.5 7 µg/m³
45Good
Next few days
daily max · US EPA AQI
Sat
💨
Moderate · UV High
85
Sun
💨
Moderate · UV High
90
Mon
💨
Unhealthy for Sensitive Groups · UV High
108
Tue
💨
Unhealthy for Sensitive Groups · UV High
117
Wed
💨
Moderate · UV Very high
62