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
10.7 µg/m³
WHO guideline 15
PM10
10.9 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
4:00 AM
💨
PM2.5 10.7 µg/m³
45Good
5:00 AM
💨
PM2.5 11.5 µg/m³
48Good
6:00 AM
💨
PM2.5 12 µg/m³
50Good
7:00 AM
💨
PM2.5 12.5 µg/m³
52Moderate
8:00 AM
💨
PM2.5 12.3 µg/m³
51Moderate
9:00 AM
💨
PM2.5 6.5 µg/m³
27Good
10:00 AM
💨
PM2.5 3.8 µg/m³
31Good
11:00 AM
💨
PM2.5 3.1 µg/m³
41Good
12:00 PM
💨
PM2.5 3.2 µg/m³
44Good
1:00 PM
💨
PM2.5 3.5 µg/m³
45Good
2:00 PM
💨
PM2.5 3.7 µg/m³
45Good
3:00 PM
💨
PM2.5 3.7 µg/m³
45Good
Next few days
daily max · US EPA AQI
Fri
💨
Moderate · UV High
52
Sun
💨
Moderate · UV High
68
Mon
💨
Moderate · UV High
74