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 01/11/26

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 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 12 AM
Ft. Collins - Greeley
[expand +]		 GREH Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 12 AM
Colorado Springs
[expand +]		 MAN Good 43 Ozone 46 PPB 8-hour 8 AM
Grand Junction
[expand +]		 GJPB Good 36 Particulate < 2.5 micrometers 6 µg/m3 24-hour 12 AM
Pueblo
[expand +]		 PWES Good 38 Ozone 41 PPB 8-hour 4 PM
Colorado River Valley
[expand +]		 RIFL Good 16 Particulate < 2.5 micrometers 2 µg/m3 24-hour 4 AM
Four Corners
[expand +]		 PAG Good 40 Particulate < 2.5 micrometers 7 µg/m3 24-hour 6 PM
Steamboat Springs
[expand +]		 SSMB Good 34 Particulate < 2.5 micrometers 6 µg/m3 24-hour 10 PM
Aspen
[expand +]		 ASPN Good 35 Ozone 38 PPB 8-hour 6 PM
Other
[expand +]		 ALA Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 12 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 31 0.035 0.035 12 PM

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