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 10/01/23

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 +]		 ADB Moderate 51 Particulate < 10 micrometers 55 µg/m3 24-hour 2 AM
Ft. Collins - Greeley
[expand +]		 PAO Good 42 Ozone 45 PPB 8-hour 6 PM
Colorado Springs
[expand +]		 MAN Good 40 Ozone 43 PPB 8-hour 7 PM
Grand Junction
[expand +]		 PAL Good 33 Ozone 36 PPB 8-hour 1 AM
Pueblo
[expand +]		 PWES Good 38 Ozone 41 PPB 8-hour 6 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 31 Ozone 33 PPB 8-hour 1 AM
Four Corners
[expand +]		 CTZ Good 32 Ozone 35 PPB 8-hour 3 PM
Steamboat Springs       Valid data unavailable      
Other
[expand +]		 ASPN Good 36 Ozone 39 PPB 8-hour 6 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 48 0.048 0.059 1 PM

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