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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 11/07/26 (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
[expand +]		 ADB Good 49 Particulate < 2.5 micrometers 8 µg/m3 24-hour 2 AM
Ft. Collins - Greeley
[expand +]		 GREH Good 49 Particulate < 2.5 micrometers 8 µg/m3 24-hour 6 PM
Colorado Springs
[expand +]		 ACAD Good 46 Ozone 50 PPB 8-hour 5 PM
Grand Junction
[expand +]		 MESA Good 35 Particulate < 2.5 micrometers 6 µg/m3 24-hour 11 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 29 Ozone 31 PPB 8-hour 5 PM
Four Corners
[expand +]		 CTZ Good 28 Ozone 30 PPB 8-hour 7 PM
Other
[expand +]		 ALA Good 46 Particulate < 2.5 micrometers 8 µg/m3 24-hour 8 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 70 0.060 0.057 12 PM

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