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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 12/27/25 (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 +]		 I25DEN Good 44 Particulate < 2.5 micrometers 8 µg/m3 24-hour 9 AM
Ft. Collins - Greeley
[expand +]		 FTCW Good 34 Ozone 37 PPB 8-hour 9 AM
Colorado Springs
[expand +]		 MAN Good 39 Ozone 42 PPB 8-hour 9 AM
Grand Junction
[expand +]		 GJPB Good 34 Particulate < 2.5 micrometers 6 µg/m3 24-hour 9 AM
Pueblo
[expand +]		 PWES Good 27 Ozone 29 PPB 8-hour 9 AM
Colorado River Valley
[expand +]		 RIFL Good 16 Particulate < 2.5 micrometers 2 µg/m3 24-hour 9 AM
Four Corners
[expand +]		 CTZ Good 23 Ozone 25 PPB 8-hour 9 AM
Steamboat Springs
[expand +]		 SSMB Good 20 Particulate < 2.5 micrometers 3 µg/m3 24-hour 9 AM
Aspen
[expand +]		 ASPN2 Good 35 Particulate < 10 micrometers 38 µg/m3 24-hour 9 AM
Other
[expand +]		 LMB Good 38 Particulate < 2.5 micrometers 6 µg/m3 24-hour 9 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
No valid VSI calculations found (12pm - 4pm)

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 I25DEN Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 3 AM
Ft. Collins - Greeley
[expand +]		 TIM Good 41 Ozone 44 PPB 8-hour 1 AM
Colorado Springs
[expand +]		 MAN Good 39 Ozone 42 PPB 8-hour 9 AM
Grand Junction
[expand +]		 GJPB Good 36 Particulate < 2.5 micrometers 6 µg/m3 24-hour 5 AM
Pueblo
[expand +]		 PWES Good 32 Ozone 35 PPB 8-hour 4 AM
Colorado River Valley
[expand +]		 RIFL Good 16 Particulate < 2.5 micrometers 2 µg/m3 24-hour 6 AM
Four Corners
[expand +]		 CTZ Good 24 Ozone 26 PPB 8-hour 6 AM
Steamboat Springs
[expand +]		 SSMB Good 22 Particulate < 2.5 micrometers 3 µg/m3 24-hour 2 AM
Aspen
[expand +]		 ASPN2 Good 35 Particulate < 10 micrometers 38 µg/m3 24-hour 9 AM
Other
[expand +]		 LMB Good 39 Particulate < 2.5 micrometers 7 µg/m3 24-hour 4 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
No valid VSI calculations found (12pm - 4pm)

* 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