Air quality in Lewistown
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
4.7 µg/m³
WHO guideline 15
PM10
4.8 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
6:00 AM
💨
PM2.5 4.7 µg/m³
29Good
7:00 AM
💨
PM2.5 4.8 µg/m³
30Good
8:00 AM
💨
PM2.5 4.9 µg/m³
34Good
9:00 AM
💨
PM2.5 4.9 µg/m³
39Good
10:00 AM
💨
PM2.5 5.2 µg/m³
44Good
11:00 AM
💨
PM2.5 5.3 µg/m³
49Good
12:00 PM
💨
PM2.5 5.7 µg/m³
58Moderate
1:00 PM
💨
PM2.5 6 µg/m³
68Moderate
2:00 PM
💨
PM2.5 6 µg/m³
76Moderate
3:00 PM
💨
PM2.5 5.9 µg/m³
81Moderate
4:00 PM
💨
PM2.5 5.8 µg/m³
80Moderate
5:00 PM
💨
PM2.5 5.7 µg/m³
70Moderate
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV High
81
Tue
💨
Unhealthy for Sensitive Groups · UV Very high
103
Wed
💨
Moderate · UV Very high
53
Thu
💨
Moderate · UV Very high
66
Fri
💨
Good · UV Very high
30