Colorado
Translate
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 11/02/26 (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 Moderate 74 Particulate < 2.5 micrometers 21 µg/m3 24-hour 9 AM
Ft. Collins - Greeley
[expand +]		 FTCF Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 4 AM
Colorado Springs
[expand +]		 CCOL Good 43 Particulate < 2.5 micrometers 7 µg/m3 24-hour 2 AM
Grand Junction
[expand +]		 PAL Good 38 Ozone 41 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 29 Ozone 31 PPB 8-hour 5 AM
Four Corners
[expand +]		 CTZ Good 34 Ozone 37 PPB 8-hour 11 AM
Other
[expand +]		 LMB Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 1 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 70 0.060 0.054 4 PM

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