Colorado
Translate
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 03/11/25

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 Good 49 Ozone 53 PPB 8-hour 12 AM
Ft. Collins - Greeley
[expand +]		 FTCW Good 46 Ozone 50 PPB 8-hour 1 AM
Colorado Springs
[expand +]		 MAN Moderate 51 Ozone 55 PPB 8-hour 12 AM
Grand Junction
[expand +]		 GJPB Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 12 AM
Pueblo
[expand +]		 PWES Good 48 Ozone 52 PPB 8-hour 6 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 43 Ozone 46 PPB 8-hour 7 PM
Four Corners
[expand +]		 CTZ Good 47 Ozone 51 PPB 8-hour 7 PM
Other
[expand +]		 TEL Moderate 52 Particulate < 10 micrometers 58 µg/m3 24-hour 2 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 38 0.040 0.025 11 AM

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