Air quality in Maryland Heights
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
6.2 µg/m³
WHO guideline 15
PM10
6.3 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
7:00 AM
💨
PM2.5 6.2 µg/m³
32Good
8:00 AM
💨
PM2.5 6.1 µg/m³
35Good
9:00 AM
💨
PM2.5 6.3 µg/m³
41Good
10:00 AM
💨
PM2.5 6.6 µg/m³
47Good
11:00 AM
💨
PM2.5 6.6 µg/m³
53Moderate
12:00 PM
💨
PM2.5 6.2 µg/m³
68Moderate
1:00 PM
💨
PM2.5 5.7 µg/m³
80Moderate
2:00 PM
💨
PM2.5 5.3 µg/m³
85Moderate
3:00 PM
💨
PM2.5 5.2 µg/m³
85Moderate
4:00 PM
💨
PM2.5 5.1 µg/m³
81Moderate
5:00 PM
💨
PM2.5 5.1 µg/m³
75Moderate
6:00 PM
💨
PM2.5 5 µg/m³
66Moderate
Next few days
daily max · US EPA AQI
Sun
💨
Moderate · UV High
85
Mon
💨
Unhealthy for Sensitive Groups · UV Very high
117
Tue
💨
Unhealthy · UV High
162
Wed
💨
Unhealthy for Sensitive Groups · UV High
106
Thu
💨
Moderate · UV High
53