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 05/12/25

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 +]		 AURE Moderate 90 Ozone 67 PPB 8-hour 5 PM
Ft. Collins - Greeley
[expand +]		 FTCW Unhealthy for Sensitive Groups 104 Ozone 72 PPB 8-hour 7 PM
Colorado Springs
[expand +]		 MAN Moderate 87 Ozone 66 PPB 8-hour 5 PM
Grand Junction
[expand +]		 PAL Moderate 74 Ozone 62 PPB 8-hour 7 PM
Pueblo
[expand +]		 PWES Moderate 80 Ozone 64 PPB 8-hour 7 PM
Colorado River Valley
[expand +]		 RIFLO3 Moderate 67 Ozone 60 PPB 8-hour 7 PM
Four Corners
[expand +]		 CTZ Moderate 71 Ozone 61 PPB 8-hour 7 PM
Steamboat Springs
[expand +]		 SSMB Good 24 Particulate < 2.5 micrometers 4 µg/m3 24-hour 6 PM
Other
[expand +]		 ASPN Good 40 Ozone 43 PPB 8-hour 7 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 33 0.036 0.032 11 AM

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