Colorado
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Banner with Colorado and CDPHE logos on left with text on right reading Colorado Air Quality with Department of Public Health and Environment on the next line.

Detailed Air Quality Summary for 12/06/25

Learn more about monitoring sites: site descriptions and
real-time monitoring map

All data are collected real-time and have not been corrected nor validated.

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 LNGM Moderate 72 Particulate < 2.5 micrometers 20 µg/m3 24-hour 1 AM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 88 Particulate < 2.5 micrometers 28 µg/m3 24-hour 1 AM
Colorado Springs
[expand +]		 MAN Good 40 Ozone 43 PPB 8-hour 12 AM
Grand Junction
[expand +]		 GJPB Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 11 PM
Pueblo
[expand +]		 PWES Good 38 Ozone 41 PPB 8-hour 3 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 24 Ozone 26 PPB 8-hour 6 PM
Four Corners
[expand +]		 CTZ Good 26 Ozone 28 PPB 8-hour 6 PM
Steamboat Springs
[expand +]		 SSMB Good 18 Particulate < 2.5 micrometers 3 µg/m3 24-hour 1 AM
Aspen
[expand +]		 ASPN Good 31 Ozone 33 PPB 8-hour 6 PM
Other
[expand +]		 DELT Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 9 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 41 0.043 0.058 12 PM

* All data are reported in Mountain Standard Time (MST). During daylight savings time add one hour to the reported hour.