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 07/07/25

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 +]		 RFN Moderate 71 Ozone 61 PPB 8-hour 7 PM
Ft. Collins - Greeley
[expand +]		 GRET Moderate 67 Ozone 60 PPB 8-hour 6 PM
Colorado Springs
[expand +]		 MAN Moderate 51 Ozone 55 PPB 8-hour 7 PM
Grand Junction
[expand +]		 PAL Good 41 Ozone 44 PPB 8-hour 7 PM
Pueblo
[expand +]		 PWES Good 48 Ozone 52 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 37 Ozone 40 PPB 8-hour 7 PM
Four Corners
[expand +]		 CTZ Good 40 Ozone 43 PPB 8-hour 5 PM
Steamboat Springs
[expand +]		 SSMB Good 24 Particulate < 2.5 micrometers 4 µg/m3 24-hour 4 AM
Other
[expand +]		 ASPN Good 36 Ozone 39 PPB 8-hour 4 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 71 0.061 0.051 11 AM

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