Colorado
Translate
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 12/30/25 (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 Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 8 AM
Ft. Collins - Greeley
[expand +]		 GREH Moderate 58 Particulate < 2.5 micrometers 13 µg/m3 24-hour 8 AM
Colorado Springs
[expand +]		 MAN Good 36 Ozone 39 PPB 8-hour 8 AM
Grand Junction
[expand +]		 GJPB Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 8 AM
Pueblo
[expand +]		 CAN Good 28 Particulate < 2.5 micrometers 5 µg/m3 24-hour 8 AM
Colorado River Valley       Valid data unavailable      
Four Corners
[expand +]		 PAG Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 8 AM
Steamboat Springs
[expand +]		 SSMB Good 30 Particulate < 2.5 micrometers 5 µg/m3 24-hour 8 AM
Aspen
[expand +]		 ASPN Good 36 Ozone 39 PPB 8-hour 8 AM
Other
[expand +]		 ALA Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 8 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 +]		 ADB Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 7 AM
Ft. Collins - Greeley
[expand +]		 GREH Moderate 58 Particulate < 2.5 micrometers 12 µg/m3 24-hour 7 AM
Colorado Springs
[expand +]		 MAN Good 36 Ozone 39 PPB 8-hour 7 AM
Grand Junction
[expand +]		 GJPB Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 8 AM
Pueblo
[expand +]		 CAN Good 33 Particulate < 2.5 micrometers 5 µg/m3 24-hour 1 AM
Colorado River Valley       Valid data unavailable      
Four Corners
[expand +]		 PAG Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 3 AM
Steamboat Springs
[expand +]		 SSMB Good 30 Particulate < 2.5 micrometers 5 µg/m3 24-hour 8 AM
Aspen
[expand +]		 ASPN Good 36 Ozone 39 PPB 8-hour 6 AM
Other
[expand +]		 ALA Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 7 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