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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 08/25/26 (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 +]		 ADB Moderate 79 Particulate < 10 micrometers 111 µg/m3 24-hour 4 PM
Ft. Collins - Greeley
[expand +]		 FOS Moderate 54 Ozone 56 PPB 8-hour 4 PM
Colorado Springs
[expand +]		 ACAD Moderate 77 Ozone 63 PPB 8-hour 4 PM
Grand Junction
[expand +]		 PAL Moderate 51 Ozone 55 PPB 8-hour 4 PM
Pueblo
[expand +]		 PWES Moderate 58 Ozone 57 PPB 8-hour 4 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 48 Ozone 52 PPB 8-hour 4 PM
Four Corners
[expand +]		 CTZ Good 46 Ozone 50 PPB 8-hour 4 PM
Steamboat Springs
[expand +]		 SSMB Good 21 Particulate < 2.5 micrometers 3 µg/m3 24-hour 4 PM
Aspen
[expand +]		 ASPN2 Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 4 PM
Other
[expand +]		 LMB Good 21 Particulate < 2.5 micrometers 3 µg/m3 24-hour 4 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 +]		 ADB Moderate 79 Particulate < 10 micrometers 111 µg/m3 24-hour 2 PM
Ft. Collins - Greeley
[expand +]		 FOS Moderate 54 Ozone 56 PPB 8-hour 4 PM
Colorado Springs
[expand +]		 ACAD Moderate 77 Ozone 63 PPB 8-hour 4 PM
Grand Junction
[expand +]		 PAL Moderate 51 Ozone 55 PPB 8-hour 4 PM
Pueblo
[expand +]		 PWES Moderate 58 Ozone 57 PPB 8-hour 4 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 48 Ozone 52 PPB 8-hour 4 PM
Four Corners
[expand +]		 CTZ Good 46 Ozone 50 PPB 8-hour 4 PM
Steamboat Springs
[expand +]		 SSMB Good 21 Particulate < 2.5 micrometers 3 µg/m3 24-hour 3 PM
Aspen
[expand +]		 ASPN2 Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 2 PM
Other
[expand +]		 LMB Good 21 Particulate < 2.5 micrometers 3 µg/m3 24-hour 4 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 92 0.071 0.064 12 PM

* 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