Air quality in Castle Pines
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
2.7 µg/m³
WHO guideline 15
PM10
3.5 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
4:00 AM
💨
PM2.5 2.7 µg/m³
26Good
5:00 AM
💨
PM2.5 2.8 µg/m³
25Good
6:00 AM
💨
PM2.5 2.8 µg/m³
26Good
7:00 AM
💨
PM2.5 3 µg/m³
31Good
8:00 AM
💨
PM2.5 3.3 µg/m³
39Good
9:00 AM
💨
PM2.5 2.9 µg/m³
46Good
10:00 AM
💨
PM2.5 2.7 µg/m³
53Moderate
11:00 AM
💨
PM2.5 3 µg/m³
66Moderate
12:00 PM
💨
PM2.5 3.1 µg/m³
76Moderate
1:00 PM
💨
PM2.5 3.2 µg/m³
78Moderate
2:00 PM
💨
PM2.5 3.7 µg/m³
76Moderate
3:00 PM
💨
PM2.5 3.4 µg/m³
75Moderate
Next few days
daily max · US EPA AQI
Tue
💨
Moderate · UV Very high
83
Wed
💨
Moderate · UV Very high
68
Thu
💨
Moderate · UV Very high
71
Fri
💨
Moderate · UV High
75