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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 11/13/26 (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 METRO
[expand +]		 ADB Moderate 76 Particulate < 10 micrometers 105 µg/m3 24-hour 11 PM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 62 Particulate < 2.5 micrometers 15 µg/m3 24-hour 12 AM
Colorado Springs
[expand +]		 CCOL Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 12 AM
Grand Junction
[expand +]		 PAL Good 31 Ozone 33 PPB 8-hour 7 PM
Pueblo
[expand +]		 PFS Good 28 Particulate < 2.5 micrometers 5 µg/m3 24-hour 12 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 27 Ozone 29 PPB 8-hour 5 PM
Four Corners
[expand +]		 PAG Good 41 Particulate < 10 micrometers 44 µg/m3 24-hour 4 AM
Steamboat Springs
[expand +]		 SSMB Good 19 Particulate < 2.5 micrometers 3 µg/m3 24-hour 12 AM
Aspen
[expand +]		 ASPN2 Good 28 Particulate < 10 micrometers 30 µg/m3 24-hour 6 AM
Other
[expand +]		 ALA Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 3 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 130 0.098 0.092 4 PM

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