Air quality in Markham
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
6.7 µg/m³
WHO guideline 15
PM10
6.8 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
12:00 PM
💨
PM2.5 6.7 µg/m³
48Good
1:00 PM
💨
PM2.5 6.8 µg/m³
65Moderate
2:00 PM
💨
PM2.5 6.1 µg/m³
63Moderate
3:00 PM
💨
PM2.5 6 µg/m³
50Good
4:00 PM
💨
PM2.5 4.6 µg/m³
46Good
5:00 PM
💨
PM2.5 4.3 µg/m³
43Good
6:00 PM
💨
PM2.5 4.7 µg/m³
39Good
7:00 PM
💨
PM2.5 6 µg/m³
35Good
8:00 PM
💨
PM2.5 7.2 µg/m³
32Good
9:00 PM
💨
PM2.5 8.2 µg/m³
34Good
10:00 PM
💨
PM2.5 8.1 µg/m³
34Good
11:00 PM
💨
PM2.5 7.3 µg/m³
30Good
Next few days
daily max · US EPA AQI
Sun
💨
Moderate · UV High
65
Mon
💨
Moderate · UV Very high
63
Tue
💨
Moderate · UV High
78
Thu
💨
No data · UV High
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