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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 07/16/26 (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 122 Ozone 77 PPB 8-hour 5 PM
Ft. Collins - Greeley
[expand +]		 FOS Moderate 87 Ozone 66 PPB 8-hour 6 PM
Colorado Springs
[expand +]		 MAN Moderate 64 Ozone 59 PPB 8-hour 7 PM
Grand Junction
[expand +]		 PAL Moderate 64 Ozone 59 PPB 8-hour 7 PM
Pueblo
[expand +]		 PWES Moderate 58 Ozone 57 PPB 8-hour 7 PM
Colorado River Valley
[expand +]		 RIFLO3 Moderate 54 Ozone 56 PPB 8-hour 7 PM
Four Corners
[expand +]		 CTZ Moderate 64 Ozone 59 PPB 8-hour 5 PM
Steamboat Springs
[expand +]		 SSMB Good 42 Particulate < 2.5 micrometers 7 µg/m3 24-hour 2 AM
Aspen
[expand +]		 ASPN2 Good 41 Particulate < 2.5 micrometers 7 µg/m3 24-hour 3 AM
Other
[expand +]		 DELT Moderate 81 Particulate < 10 micrometers 115 µg/m3 24-hour 12 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 91 0.071 0.066 11 AM

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