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 11/16/25

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 +]		 LNGM Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 4 PM
Ft. Collins - Greeley
[expand +]		 GREH Moderate 70 Particulate < 2.5 micrometers 19 µg/m3 24-hour 7 AM
Colorado Springs
[expand +]		 MAN Good 36 Ozone 39 PPB 8-hour 7 PM
Grand Junction
[expand +]		 GJPB Moderate 62 Particulate < 2.5 micrometers 15 µg/m3 24-hour 1 AM
Pueblo
[expand +]		 PWES Good 33 Ozone 36 PPB 8-hour 9 PM
Colorado River Valley
[expand +]		 RIFL Good 36 Particulate < 2.5 micrometers 6 µg/m3 24-hour 1 AM
Four Corners
[expand +]		 PAG Good 30 Particulate < 2.5 micrometers 5 µg/m3 24-hour 1 AM
Steamboat Springs
[expand +]		 SSMB Good 30 Particulate < 2.5 micrometers 5 µg/m3 24-hour 1 AM
Aspen
[expand +]		 ASPN Good 28 Ozone 30 PPB 8-hour 5 PM
Other
[expand +]		 DELT Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 1 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 50 0.050 0.046 12 PM

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