Air quality in Waterloo
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
4.5 µg/m³
WHO guideline 15
PM10
4.5 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
9:00 AM
💨
PM2.5 4.5 µg/m³
21Good
10:00 AM
💨
PM2.5 3.4 µg/m³
31Good
11:00 AM
💨
PM2.5 2.7 µg/m³
38Good
12:00 PM
💨
PM2.5 2.4 µg/m³
42Good
1:00 PM
💨
PM2.5 2.3 µg/m³
43Good
2:00 PM
💨
PM2.5 2.2 µg/m³
44Good
3:00 PM
💨
PM2.5 2.1 µg/m³
46Good
4:00 PM
💨
PM2.5 2.2 µg/m³
48Good
5:00 PM
💨
PM2.5 2.4 µg/m³
48Good
6:00 PM
💨
PM2.5 2.7 µg/m³
45Good
7:00 PM
💨
PM2.5 3.1 µg/m³
41Good
8:00 PM
💨
PM2.5 3.9 µg/m³
38Good
Next few days
daily max · US EPA AQI
Wed
💨
Good · UV Moderate
41