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 04/16/26 (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 +]		 RFN Moderate 64 Ozone 59 PPB 8-hour 12 AM
Ft. Collins - Greeley
[expand +]		 GRET Moderate 58 Ozone 57 PPB 8-hour 6 PM
Colorado Springs
[expand +]		 MAN Moderate 67 Ozone 60 PPB 8-hour 12 AM
Grand Junction
[expand +]		 PAL Moderate 61 Ozone 58 PPB 8-hour 10 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 47 Ozone 51 PPB 8-hour 9 PM
Four Corners
[expand +]		 CTZ Moderate 51 Ozone 55 PPB 8-hour 8 PM
Other
[expand +]		 LMB Good 18 Particulate < 10 micrometers 19 µg/m3 24-hour 8 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 38 0.041 0.031 11 AM

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