Colorado
Translate
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 08/05/26 (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 +]		 NREL Unhealthy for Sensitive Groups 146 Ozone 84 PPB 8-hour 9 PM
Ft. Collins - Greeley
[expand +]		 FOS Unhealthy for Sensitive Groups 108 Ozone 73 PPB 8-hour 8 PM
Colorado Springs
[expand +]		 ACAD Moderate 90 Ozone 67 PPB 8-hour 6 PM
Grand Junction
[expand +]		 PAL Moderate 80 Ozone 64 PPB 8-hour 7 PM
Pueblo
[expand +]		 CAN Moderate 93 Particulate < 2.5 micrometers 31 µg/m3 24-hour 1 AM
Colorado River Valley
[expand +]		 RIFLO3 Moderate 64 Ozone 59 PPB 8-hour 6 PM
Four Corners
[expand +]		 CTZ Moderate 74 Ozone 62 PPB 8-hour 6 PM
Steamboat Springs
[expand +]		 SSMB Moderate 70 Particulate < 2.5 micrometers 19 µg/m3 24-hour 12 AM
Aspen
[expand +]		 ASPN2 Moderate 65 Particulate < 2.5 micrometers 16 µg/m3 24-hour 1 AM
Other
[expand +]		 LMB Moderate 80 Particulate < 2.5 micrometers 24 µg/m3 24-hour 1 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Ext Poor 205 0.188 0.144 2 PM

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