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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 09/16/26 (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 53 Particulate < 10 micrometers 59 µg/m3 24-hour 6 PM
Ft. Collins - Greeley
[expand +]		 FOS Good 39 Ozone 42 PPB 8-hour 6 PM
Colorado Springs
[expand +]		 ACAD Good 43 Ozone 46 PPB 8-hour 6 PM
Grand Junction       Valid data unavailable      
Pueblo
[expand +]		 PWES Good 38 Ozone 41 PPB 8-hour 6 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 31 Ozone 33 PPB 8-hour 6 PM
Four Corners
[expand +]		 CTZ Good 36 Ozone 39 PPB 8-hour 6 PM
Steamboat Springs
[expand +]		 SSMB Good 12 Particulate < 2.5 micrometers 2 µg/m3 24-hour 6 PM
Aspen
[expand +]		 ASPN2 Good 14 Particulate < 2.5 micrometers 2 µg/m3 24-hour 6 PM
Other
[expand +]		 LMB Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 6 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 53 Particulate < 10 micrometers 59 µg/m3 24-hour 3 PM
Ft. Collins - Greeley
[expand +]		 FTCF Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 1 AM
Colorado Springs
[expand +]		 ACAD Good 43 Ozone 46 PPB 8-hour 6 PM
Grand Junction
[expand +]		 PAL Good 34 Ozone 37 PPB 8-hour 1 AM
Pueblo
[expand +]		 PWES Good 38 Ozone 41 PPB 8-hour 6 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 32 Ozone 35 PPB 8-hour 4 PM
Four Corners
[expand +]		 CTZ Good 36 Ozone 39 PPB 8-hour 6 PM
Steamboat Springs
[expand +]		 SSMB Good 16 Particulate < 2.5 micrometers 2 µg/m3 24-hour 1 AM
Aspen
[expand +]		 ASPN2 Good 14 Particulate < 2.5 micrometers 2 µg/m3 24-hour 1 PM
Other
[expand +]		 LMB Good 28 Particulate < 10 micrometers 30 µg/m3 24-hour 5 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 81 0.066 0.075 2 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