Air quality in Butte
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
8.6 µg/m³
WHO guideline 15
PM10
9.4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
10:00 AM
💨
PM2.5 8.6 µg/m³
36Good
11:00 AM
💨
PM2.5 7.4 µg/m³
44Good
12:00 PM
💨
PM2.5 7.2 µg/m³
51Moderate
1:00 PM
💨
PM2.5 7 µg/m³
55Moderate
2:00 PM
💨
PM2.5 6.7 µg/m³
48Good
3:00 PM
💨
PM2.5 6 µg/m³
49Good
4:00 PM
💨
PM2.5 5.7 µg/m³
49Good
5:00 PM
💨
PM2.5 6.1 µg/m³
50Good
6:00 PM
💨
PM2.5 6.6 µg/m³
49Good
7:00 PM
💨
PM2.5 7 µg/m³
44Good
8:00 PM
💨
PM2.5 7.2 µg/m³
38Good
9:00 PM
💨
PM2.5 7.3 µg/m³
33Good
Next few days
daily max · US EPA AQI
Wed
💨
Moderate · UV High
55
Thu
💨
Moderate · UV Moderate
58
Fri
💨
Moderate · UV High
55
Sat
💨
Moderate · UV High
51