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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 08/01/26 (Yesterday)

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
[expand +]		 NREL Unhealthy for Sensitive Groups 129 Ozone 79 PPB 8-hour 6 PM
Ft. Collins - Greeley
[expand +]		 FOS Unhealthy for Sensitive Groups 112 Ozone 74 PPB 8-hour 6 PM
Colorado Springs
[expand +]		 MAN Unhealthy for Sensitive Groups 104 Ozone 72 PPB 8-hour 7 PM
Grand Junction
[expand +]		 PAL Moderate 67 Ozone 60 PPB 8-hour 6 PM
Colorado River Valley
[expand +]		 RIFLO3 Moderate 51 Ozone 55 PPB 8-hour 7 PM
Four Corners
[expand +]		 CTZ Moderate 61 Ozone 58 PPB 8-hour 5 PM
Other
[expand +]		 LMB Moderate 65 Particulate < 2.5 micrometers 16 µg/m3 24-hour 6 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 125 0.094 0.090 11 AM

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