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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 12/05/25 (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 +]		 LNGM Moderate 70 Particulate < 2.5 micrometers 19 µg/m3 24-hour 4 PM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 80 Particulate < 2.5 micrometers 24 µg/m3 24-hour 4 PM
Colorado Springs
[expand +]		 MAN Good 40 Ozone 43 PPB 8-hour 4 PM
Grand Junction
[expand +]		 GJPB Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 4 PM
Pueblo
[expand +]		 PWES Good 37 Ozone 40 PPB 8-hour 4 PM
Colorado River Valley
[expand +]		 RIFL Good 18 Particulate < 2.5 micrometers 3 µg/m3 24-hour 4 PM
Four Corners
[expand +]		 CTZ Good 30 Ozone 32 PPB 8-hour 4 PM
Steamboat Springs
[expand +]		 SSMB Good 21 Particulate < 2.5 micrometers 3 µg/m3 24-hour 4 PM
Aspen
[expand +]		 ASPN Good 30 Ozone 32 PPB 8-hour 4 PM
Other
[expand +]		 ALA Good 35 Particulate < 2.5 micrometers 6 µg/m3 24-hour 4 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 118 0.089 0.099 4 PM

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 LNGM Moderate 70 Particulate < 2.5 micrometers 19 µg/m3 24-hour 3 PM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 80 Particulate < 2.5 micrometers 24 µg/m3 24-hour 4 PM
Colorado Springs
[expand +]		 MAN Good 40 Ozone 43 PPB 8-hour 4 PM
Grand Junction
[expand +]		 GJPB Good 36 Particulate < 2.5 micrometers 6 µg/m3 24-hour 2 AM
Pueblo
[expand +]		 PWES Good 42 Ozone 45 PPB 8-hour 6 AM
Colorado River Valley
[expand +]		 RIFL Good 18 Particulate < 2.5 micrometers 3 µg/m3 24-hour 12 PM
Four Corners
[expand +]		 PAG Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 5 AM
Steamboat Springs
[expand +]		 SSMB Good 23 Particulate < 2.5 micrometers 4 µg/m3 24-hour 5 AM
Aspen
[expand +]		 ASPN Good 30 Ozone 32 PPB 8-hour 4 PM
Other
[expand +]		 ALA Good 35 Particulate < 2.5 micrometers 6 µg/m3 24-hour 4 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 118 0.089 0.099 4 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