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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 08/27/26 (Today)

Air Quality Forecasts and Advisories & Colorado Smoke Outlook
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.		 Current Air Quality

Current Hour:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 NREL Moderate 93 Ozone 68 PPB 8-hour 5 PM
Ft. Collins - Greeley
[expand +]		 FOS Moderate 71 Ozone 61 PPB 8-hour 5 PM
Colorado Springs
[expand +]		 ACAD Moderate 54 Ozone 56 PPB 8-hour 5 PM
Grand Junction
[expand +]		 PAL Good 49 Ozone 53 PPB 8-hour 5 PM
Pueblo
[expand +]		 PWES Good 46 Ozone 50 PPB 8-hour 5 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 44 Ozone 47 PPB 8-hour 5 PM
Four Corners
[expand +]		 CTZ Good 46 Ozone 50 PPB 8-hour 5 PM
Steamboat Springs
[expand +]		 SSMB Good 23 Particulate < 2.5 micrometers 4 µg/m3 24-hour 5 PM
Aspen
[expand +]		 ASPN2 Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 5 PM
Other
[expand +]		 ALA Good 22 Particulate < 2.5 micrometers 3 µg/m3 24-hour 5 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 NREL Moderate 93 Ozone 68 PPB 8-hour 5 PM
Ft. Collins - Greeley
[expand +]		 FOS Moderate 71 Ozone 61 PPB 8-hour 5 PM
Colorado Springs
[expand +]		 ACAD Moderate 54 Ozone 56 PPB 8-hour 5 PM
Grand Junction
[expand +]		 PAL Good 49 Ozone 53 PPB 8-hour 5 PM
Pueblo
[expand +]		 PWES Good 46 Ozone 50 PPB 8-hour 5 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 44 Ozone 47 PPB 8-hour 5 PM
Four Corners
[expand +]		 CTZ Good 46 Ozone 50 PPB 8-hour 5 PM
Steamboat Springs
[expand +]		 SSMB Good 28 Particulate < 2.5 micrometers 5 µg/m3 24-hour 2 AM
Aspen
[expand +]		 ASPN2 Good 29 Particulate < 2.5 micrometers 5 µg/m3 24-hour 5 AM
Other
[expand +]		 ALA Good 22 Particulate < 2.5 micrometers 3 µg/m3 24-hour 5 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 43 0.044 0.040 11 AM

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

AQI health statements
Site information and abbreviations