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 03/23/25

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 +]		 AURE Good 49 Ozone 53 PPB 8-hour 4 PM
Ft. Collins - Greeley
[expand +]		 LAST Good 50 Ozone 54 PPB 8-hour 5 PM
Colorado Springs
[expand +]		 MAN Good 44 Ozone 47 PPB 8-hour 3 AM
Grand Junction
[expand +]		 PAL Good 44 Ozone 47 PPB 8-hour 6 PM
Pueblo
[expand +]		 PWES Good 44 Ozone 47 PPB 8-hour 2 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 43 Ozone 46 PPB 8-hour 7 PM
Four Corners
[expand +]		 CTZ Good 43 Ozone 46 PPB 8-hour 5 PM
Other
[expand +]		 ASPN Good 44 Ozone 47 PPB 8-hour 4 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 15 0.022 0.017 1 PM

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