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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 01/19/25 (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 +]		 LNGM Moderate 54 Particulate < 2.5 micrometers 10 µg/m3 24-hour 9 PM
Ft. Collins - Greeley
[expand +]		 FTCF Good 42 Particulate < 2.5 micrometers 7 µg/m3 24-hour 8 PM
Colorado Springs
[expand +]		 CCOL Good 34 Particulate < 2.5 micrometers 6 µg/m3 24-hour 11 PM
Grand Junction
[expand +]		 PAL Good 36 Ozone 39 PPB 8-hour 8 PM
Pueblo
[expand +]		 PWES Good 35 Ozone 38 PPB 8-hour 6 PM
Colorado River Valley
[expand +]		 RIFL Good 21 Particulate < 2.5 micrometers 3 µg/m3 24-hour 3 AM
Four Corners
[expand +]		 CTZ Good 39 Ozone 42 PPB 8-hour 6 PM
Other
[expand +]		 ASPN Good 39 Ozone 42 PPB 8-hour 5 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 99 0.075 0.073 12 PM

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