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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 02/05/26 (Yesterday)

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 +]		 I25GLO Moderate 51 Nitrogen Dioxide 54 PPB 1-hour 8 PM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 1 PM
Colorado Springs
[expand +]		 MAN Good 44 Ozone 47 PPB 8-hour 6 PM
Grand Junction
[expand +]		 GJPB Good 40 Particulate < 2.5 micrometers 7 µg/m3 24-hour 1 AM
Pueblo
[expand +]		 PWES Good 33 Ozone 36 PPB 8-hour 8 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 24 Ozone 26 PPB 8-hour 6 PM
Four Corners
[expand +]		 CTZ Good 35 Ozone 38 PPB 8-hour 6 PM
Steamboat Springs
[expand +]		 SSMB Good 34 Particulate < 2.5 micrometers 6 µg/m3 24-hour 1 PM
Aspen
[expand +]		 ASPN2 Good 42 Particulate < 10 micrometers 45 µg/m3 24-hour 12 AM
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 47 0.048 0.037 12 PM

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