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 12/05/25

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
[expand +]		 LNGM Moderate 72 Particulate < 2.5 micrometers 20 µg/m3 24-hour 11 PM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 88 Particulate < 2.5 micrometers 28 µg/m3 24-hour 12 AM
Colorado Springs
[expand +]		 MAN Good 40 Ozone 43 PPB 8-hour 6 PM
Grand Junction
[expand +]		 GJPB Good 36 Particulate < 2.5 micrometers 6 µg/m3 24-hour 2 AM
Colorado River Valley
[expand +]		 RIFL Good 19 Particulate < 2.5 micrometers 3 µg/m3 24-hour 7 PM
Four Corners
[expand +]		 PAG Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 5 AM
Other
[expand +]		 ALA Good 48 Particulate < 2.5 micrometers 8 µg/m3 24-hour 12 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 118 0.089 0.099 4 PM

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