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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 07/25/24 (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 METRO
[expand +]		 RFN Unhealthy 156 Ozone 88 PPB 8-hour 6 PM
Ft. Collins - Greeley
[expand +]		 FTCW Unhealthy for Sensitive Groups 150 Ozone 85 PPB 8-hour 6 PM
Colorado Springs
[expand +]		 MAN Unhealthy for Sensitive Groups 140 Ozone 82 PPB 8-hour 6 PM
Grand Junction
[expand +]		 PAL Moderate 84 Ozone 65 PPB 8-hour 5 PM
Pueblo
[expand +]		 PWES Unhealthy for Sensitive Groups 122 Ozone 77 PPB 8-hour 6 PM
Colorado River Valley
[expand +]		 RIFL Moderate 72 Particulate < 2.5 micrometers 20 µg/m3 24-hour 1 AM
Four Corners
[expand +]		 CTZ Moderate 77 Ozone 63 PPB 8-hour 4 PM
Other
[expand +]		 LMB Unhealthy for Sensitive Groups 110 Particulate < 2.5 micrometers 39 µg/m3 24-hour 12 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 192 0.144 0.135 11 AM

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