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 04/17/25

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 +]		 EVG Moderate 74 Ozone 62 PPB 8-hour 4 PM
Ft. Collins - Greeley
[expand +]		 FTCW Good 46 Ozone 50 PPB 8-hour 1 AM
Colorado Springs
[expand +]		 MAN Moderate 97 Ozone 69 PPB 8-hour 6 PM
Grand Junction
[expand +]		 PAL Good 50 Ozone 54 PPB 8-hour 6 PM
Pueblo
[expand +]		 PWES Moderate 87 Ozone 66 PPB 8-hour 7 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 48 Ozone 52 PPB 8-hour 6 PM
Four Corners
[expand +]		 CTZ Good 46 Ozone 50 PPB 8-hour 10 PM
Other
[expand +]		 ASPN Moderate 71 Ozone 61 PPB 8-hour 6 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 72 0.062 0.083 3 PM

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