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 11/21/24

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 +]		 I25GLO Moderate 66 Particulate < 2.5 micrometers 16 µg/m3 24-hour 10 PM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 58 Particulate < 2.5 micrometers 12 µg/m3 24-hour 11 PM
Colorado Springs
[expand +]		 MAN Good 41 Ozone 44 PPB 8-hour 10 AM
Grand Junction
[expand +]		 GJPB Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 12 AM
Colorado River Valley
[expand +]		 RIFL Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 1 AM
Four Corners
[expand +]		 CTZ Good 33 Ozone 36 PPB 8-hour 5 PM
Other
[expand +]		 ALA Moderate 51 Particulate < 2.5 micrometers 9 µg/m3 24-hour 10 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 192 0.144 0.157 1 PM

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