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 01/25/25

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 +]		 BOUR Good 41 Ozone 44 PPB 8-hour 7 PM
Ft. Collins - Greeley
[expand +]		 FTCW Good 40 Ozone 43 PPB 8-hour 5 PM
Colorado Springs
[expand +]		 MAN Good 34 Ozone 37 PPB 8-hour 8 PM
Grand Junction
[expand +]		 PAL Good 33 Ozone 36 PPB 8-hour 8 PM
Pueblo
[expand +]		 PWES Good 35 Ozone 38 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFL Good 33 Particulate < 2.5 micrometers 5 µg/m3 24-hour 9 PM
Four Corners
[expand +]		 CTZ Good 41 Ozone 44 PPB 8-hour 6 PM
Other
[expand +]		 ALA Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 7 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
No valid VSI calculations found (12pm - 4pm)

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