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
7.9 µg/m³
WHO guideline 15
PM10
8 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
9:00 AM
💨
PM2.5 7.9 µg/m³
33Good
10:00 AM
💨
PM2.5 5.7 µg/m³
33Good
11:00 AM
💨
PM2.5 6.5 µg/m³
43Good
12:00 PM
💨
PM2.5 6.9 µg/m³
48Good
1:00 PM
💨
PM2.5 6.4 µg/m³
50Good
2:00 PM
💨
PM2.5 5.7 µg/m³
53Moderate
3:00 PM
💨
PM2.5 5.2 µg/m³
55Moderate
4:00 PM
💨
PM2.5 4.7 µg/m³
53Moderate
5:00 PM
💨
PM2.5 4.3 µg/m³
49Good
6:00 PM
💨
PM2.5 3.9 µg/m³
44Good
7:00 PM
💨
PM2.5 3.8 µg/m³
37Good
8:00 PM
💨
PM2.5 4.6 µg/m³
31Good
Next few days
daily max · US EPA AQI
Tue
💨
Moderate · UV Very high
55
Wed
💨
Moderate · UV Moderate
78
Fri
💨
Moderate · UV High
58