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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 09/13/26 (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 Good 49 Particulate < 10 micrometers 53 µg/m3 24-hour 10 PM
Ft. Collins - Greeley
[expand +]		 FTCW Good 46 Ozone 50 PPB 8-hour 10 PM
Colorado Springs
[expand +]		 ACAD Good 45 Ozone 49 PPB 8-hour 10 PM
Grand Junction
[expand +]		 PAL Good 38 Ozone 41 PPB 8-hour 10 PM
Pueblo
[expand +]		 PWES Good 39 Ozone 42 PPB 8-hour 10 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 31 Ozone 34 PPB 8-hour 10 PM
Four Corners
[expand +]		 CTZ Good 39 Ozone 42 PPB 8-hour 10 PM
Steamboat Springs
[expand +]		 SSMB Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 10 PM
Aspen
[expand +]		 ASPN2 Good 14 Particulate < 2.5 micrometers 2 µg/m3 24-hour 10 PM
Other
[expand +]		 ALA Good 37 Particulate < 2.5 micrometers 6 µg/m3 24-hour 10 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 51 Ozone 55 PPB 8-hour 6 PM
Ft. Collins - Greeley
[expand +]		 FOS Moderate 67 Ozone 60 PPB 8-hour 6 PM
Colorado Springs
[expand +]		 ACAD Good 50 Ozone 54 PPB 8-hour 6 PM
Grand Junction
[expand +]		 PAL Good 41 Ozone 44 PPB 8-hour 6 PM
Pueblo
[expand +]		 PWES Good 44 Ozone 48 PPB 8-hour 5 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 37 Ozone 40 PPB 8-hour 6 PM
Four Corners
[expand +]		 CTZ Good 42 Ozone 45 PPB 8-hour 6 PM
Steamboat Springs
[expand +]		 SSMB Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 6 PM
Aspen
[expand +]		 ASPN2 Good 16 Particulate < 2.5 micrometers 2 µg/m3 24-hour 6 PM
Other
[expand +]		 ALA Moderate 54 Particulate < 2.5 micrometers 10 µg/m3 24-hour 12 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 31 0.035 0.026 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