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 08/05/25

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 METRO
[expand +]		 RFN Moderate 90 Ozone 67 PPB 8-hour 6 PM
Ft. Collins - Greeley
[expand +]		 FTCF Moderate 67 Particulate < 2.5 micrometers 17 µg/m3 24-hour 12 AM
Colorado Springs
[expand +]		 ACAD Moderate 58 Ozone 57 PPB 8-hour 7 PM
Grand Junction
[expand +]		 GJPB Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 12 PM
Pueblo
[expand +]		 CAN Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 11 AM
Colorado River Valley
[expand +]		 RIFL Moderate 64 Particulate < 2.5 micrometers 16 µg/m3 24-hour 1 AM
Four Corners
[expand +]		 PAG Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 1 AM
Steamboat Springs
[expand +]		 SSMB Moderate 94 Particulate < 2.5 micrometers 32 µg/m3 24-hour 1 PM
Aspen
[expand +]		 ASPN2 Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 3 AM
Other
[expand +]		 ALA Moderate 77 Particulate < 2.5 micrometers 23 µg/m3 24-hour 6 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 135 0.101 0.089 11 AM

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