Air quality in Niwot
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
3.1 µg/m³
WHO guideline 15
PM10
4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
2:00 PM
💨
PM2.5 3.1 µg/m³
86Moderate
3:00 PM
💨
PM2.5 4.3 µg/m³
80Moderate
4:00 PM
💨
PM2.5 4.5 µg/m³
85Moderate
5:00 PM
💨
PM2.5 4.9 µg/m³
91Moderate
6:00 PM
💨
PM2.5 5.2 µg/m³
91Moderate
7:00 PM
💨
PM2.5 6.1 µg/m³
80Moderate
8:00 PM
💨
PM2.5 6.2 µg/m³
61Moderate
9:00 PM
💨
PM2.5 5.3 µg/m³
49Good
10:00 PM
💨
PM2.5 5.1 µg/m³
44Good
11:00 PM
💨
PM2.5 5.3 µg/m³
40Good
12:00 AM
💨
PM2.5 5.3 µg/m³
36Good
1:00 AM
💨
PM2.5 5.8 µg/m³
34Good
Next few days
daily max · US EPA AQI
Mon
💨
Moderate · UV Very high
95
Tue
💨
Unhealthy for Sensitive Groups · UV Very high
108
Wed
💨
Unhealthy for Sensitive Groups · UV Very high
126
Thu
💨
Unhealthy for Sensitive Groups · UV Very high
111
Fri
💨
Good · UV Very high
38