Air quality in Johnstown
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
14 µg/m³
WHO guideline 15
PM10
14.3 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
1:00 AM
💨
PM2.5 14 µg/m³
55Moderate
2:00 AM
💨
PM2.5 15.8 µg/m³
59Moderate
3:00 AM
💨
PM2.5 17.3 µg/m³
62Moderate
4:00 AM
💨
PM2.5 18.5 µg/m³
64Moderate
5:00 AM
💨
PM2.5 19.6 µg/m³
67Moderate
6:00 AM
💨
PM2.5 20.7 µg/m³
69Moderate
7:00 AM
💨
PM2.5 22.4 µg/m³
73Moderate
8:00 AM
💨
PM2.5 22.2 µg/m³
72Moderate
9:00 AM
💨
PM2.5 10.4 µg/m³
43Good
10:00 AM
💨
PM2.5 6.6 µg/m³
34Good
11:00 AM
💨
PM2.5 6.2 µg/m³
41Good
12:00 PM
💨
PM2.5 6.2 µg/m³
44Good
Next few days
daily max · US EPA AQI
Wed
💨
Moderate · UV High
73
Thu
💨
Moderate · UV High
61
Fri
💨
Moderate · UV High
59
Sun
💨
Moderate · UV High
53