Air quality in Charleston
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
13.5 µg/m³
WHO guideline 15
PM10
13.6 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
1:00 AM
💨
PM2.5 13.5 µg/m³
54Moderate
2:00 AM
💨
PM2.5 12.3 µg/m³
51Moderate
3:00 AM
💨
PM2.5 11.1 µg/m³
46Good
4:00 AM
💨
PM2.5 9.9 µg/m³
41Good
5:00 AM
💨
PM2.5 9.1 µg/m³
38Good
6:00 AM
💨
PM2.5 8.8 µg/m³
37Good
7:00 AM
💨
PM2.5 8.9 µg/m³
37Good
8:00 AM
💨
PM2.5 8.9 µg/m³
37Good
9:00 AM
💨
PM2.5 9 µg/m³
38Good
10:00 AM
💨
PM2.5 8.4 µg/m³
43Good
11:00 AM
💨
PM2.5 7.5 µg/m³
50Good
12:00 PM
💨
PM2.5 7.3 µg/m³
65Moderate
Next few days
daily max · US EPA AQI
Thu
💨
Moderate · UV Very high
90
Fri
💨
Unhealthy for Sensitive Groups · UV High
103
Sat
💨
Moderate · UV High
80
Sun
💨
Moderate · UV Very high
91
Mon
💨
Moderate · UV Very high
55