Air quality in Chester
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
4.2 µg/m³
WHO guideline 15
PM10
4.5 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
5:00 PM
💨
PM2.5 4.2 µg/m³
37Good
6:00 PM
💨
PM2.5 4.1 µg/m³
34Good
7:00 PM
💨
PM2.5 3.9 µg/m³
30Good
8:00 PM
💨
PM2.5 3.9 µg/m³
27Good
9:00 PM
💨
PM2.5 3.8 µg/m³
26Good
10:00 PM
💨
PM2.5 3.8 µg/m³
26Good
11:00 PM
💨
PM2.5 3.8 µg/m³
25Good
12:00 AM
💨
PM2.5 3.6 µg/m³
25Good
1:00 AM
💨
PM2.5 3.5 µg/m³
25Good
2:00 AM
💨
PM2.5 3.5 µg/m³
25Good
3:00 AM
💨
PM2.5 3.6 µg/m³
25Good
4:00 AM
💨
PM2.5 3.9 µg/m³
24Good
Next few days
daily max · US EPA AQI
Tue
💨
No data · UV Moderate
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