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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 11/15/25 (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 44 Particulate < 10 micrometers 48 µg/m3 24-hour 6 PM
Ft. Collins - Greeley
[expand +]		 GREH Moderate 62 Particulate < 2.5 micrometers 14 µg/m3 24-hour 6 PM
Colorado Springs
[expand +]		 MAN Good 34 Ozone 37 PPB 8-hour 6 PM
Grand Junction
[expand +]		 GJPB Moderate 59 Particulate < 2.5 micrometers 13 µg/m3 24-hour 6 PM
Pueblo
[expand +]		 PWES Good 34 Ozone 37 PPB 8-hour 6 PM
Colorado River Valley
[expand +]		 RIFL Good 33 Particulate < 2.5 micrometers 5 µg/m3 24-hour 6 PM
Four Corners
[expand +]		 CTZ Good 34 Ozone 37 PPB 8-hour 6 PM
Steamboat Springs
[expand +]		 SSMB Good 33 Particulate < 2.5 micrometers 6 µg/m3 24-hour 6 PM
Aspen
[expand +]		 ASPN Good 31 Ozone 34 PPB 8-hour 6 PM
Other
[expand +]		 DELT Moderate 56 Particulate < 2.5 micrometers 11 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 +]		 NJH Moderate 62 Particulate < 10 micrometers 78 µg/m3 24-hour 6 AM
Ft. Collins - Greeley
[expand +]		 GREH Moderate 62 Particulate < 2.5 micrometers 14 µg/m3 24-hour 6 PM
Colorado Springs
[expand +]		 MAN Good 34 Ozone 37 PPB 8-hour 1 AM
Grand Junction
[expand +]		 GJPB Moderate 59 Particulate < 2.5 micrometers 13 µg/m3 24-hour 4 PM
Pueblo
[expand +]		 PWES Good 35 Ozone 38 PPB 8-hour 2 AM
Colorado River Valley
[expand +]		 RIFL Good 33 Particulate < 2.5 micrometers 5 µg/m3 24-hour 5 PM
Four Corners
[expand +]		 PAG Good 41 Particulate < 2.5 micrometers 7 µg/m3 24-hour 9 AM
Steamboat Springs
[expand +]		 SSMB Good 36 Particulate < 2.5 micrometers 6 µg/m3 24-hour 11 AM
Aspen
[expand +]		 ASPN Good 32 Ozone 35 PPB 8-hour 4 PM
Other
[expand +]		 ALA Moderate 58 Particulate < 2.5 micrometers 12 µg/m3 24-hour 4 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 60 0.056 0.054 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