Air quality in St. Johns
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
10.1 µg/m³
WHO guideline 15
PM10
13.1 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
10:00 AM
💨
PM2.5 10.1 µg/m³
42Good
11:00 AM
💨
PM2.5 8.4 µg/m³
36Good
12:00 PM
💨
PM2.5 7.1 µg/m³
36Good
1:00 PM
💨
PM2.5 6.3 µg/m³
35Good
2:00 PM
💨
PM2.5 6 µg/m³
34Good
3:00 PM
💨
PM2.5 5.6 µg/m³
32Good
4:00 PM
💨
PM2.5 5.4 µg/m³
31Good
5:00 PM
💨
PM2.5 5.2 µg/m³
29Good
6:00 PM
💨
PM2.5 4.8 µg/m³
27Good
7:00 PM
💨
PM2.5 4.6 µg/m³
25Good
8:00 PM
💨
PM2.5 4.2 µg/m³
23Good
9:00 PM
💨
PM2.5 4.5 µg/m³
21Good
Next few days
daily max · US EPA AQI
Sat
💨
Moderate · UV High
52
Sun
💨
Good · UV Very high
28
Mon
💨
Good · UV Very high
27
Tue
💨
Good · UV Very high
26
Wed
💨
Good · UV Very high
28