Air quality in Caldwell
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
5.2 µg/m³
WHO guideline 15
PM10
6.8 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
6:00 PM
💨
PM2.5 5.2 µg/m³
49Good
7:00 PM
💨
PM2.5 4.6 µg/m³
46Good
8:00 PM
💨
PM2.5 4.7 µg/m³
41Good
9:00 PM
💨
PM2.5 5.5 µg/m³
36Good
10:00 PM
💨
PM2.5 6.2 µg/m³
31Good
11:00 PM
💨
PM2.5 7.1 µg/m³
30Good
12:00 AM
💨
PM2.5 7.5 µg/m³
31Good
1:00 AM
💨
PM2.5 6.9 µg/m³
29Good
2:00 AM
💨
PM2.5 6.2 µg/m³
26Good
3:00 AM
💨
PM2.5 6.2 µg/m³
26Good
4:00 AM
💨
PM2.5 6.8 µg/m³
28Good
5:00 AM
💨
PM2.5 7.5 µg/m³
31Good
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV High
55
Wed
💨
Moderate · UV High
52
Thu
💨
Moderate · UV High
55
Fri
💨
Moderate · UV High
55