Air quality in Williston
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
8.1 µg/m³
WHO guideline 15
PM10
10 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
3:00 PM
💨
PM2.5 8.1 µg/m³
58Moderate
4:00 PM
💨
PM2.5 8.1 µg/m³
60Moderate
5:00 PM
💨
PM2.5 8.2 µg/m³
56Moderate
6:00 PM
💨
PM2.5 8.4 µg/m³
50Good
7:00 PM
💨
PM2.5 9.3 µg/m³
45Good
8:00 PM
💨
PM2.5 10.7 µg/m³
45Good
9:00 PM
💨
PM2.5 11.8 µg/m³
49Good
10:00 PM
💨
PM2.5 12.4 µg/m³
52Moderate
11:00 PM
💨
PM2.5 12.8 µg/m³
52Moderate
12:00 AM
💨
PM2.5 13.1 µg/m³
53Moderate
1:00 AM
💨
PM2.5 13.2 µg/m³
53Moderate
2:00 AM
💨
PM2.5 12.9 µg/m³
53Moderate
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV Very high
68
Tue
💨
Moderate · UV Very high
73
Wed
💨
Moderate · UV Very high
95
Thu
💨
Moderate · UV Very high
100
Fri
💨
Good · UV Very high
49