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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 12/31/25 (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 +]		 I25GLO Moderate 56 Particulate < 2.5 micrometers 11 µg/m3 24-hour 7 AM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 56 Particulate < 2.5 micrometers 12 µg/m3 24-hour 7 AM
Colorado Springs
[expand +]		 MAN Good 30 Ozone 32 PPB 8-hour 7 AM
Grand Junction
[expand +]		 GJPB Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 7 AM
Pueblo
[expand +]		 PFS Good 28 Particulate < 2.5 micrometers 5 µg/m3 24-hour 7 AM
Colorado River Valley
[expand +]		 RIFL Good 20 Particulate < 2.5 micrometers 3 µg/m3 24-hour 7 AM
Four Corners
[expand +]		 PAG Good 19 Particulate < 2.5 micrometers 3 µg/m3 24-hour 7 AM
Steamboat Springs
[expand +]		 SSMB Good 37 Particulate < 2.5 micrometers 6 µg/m3 24-hour 7 AM
Aspen
[expand +]		 ASPN Good 30 Ozone 32 PPB 8-hour 7 AM
Other
[expand +]		 DELT Good 50 Particulate < 2.5 micrometers 9 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)

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 I25GLO Moderate 56 Particulate < 2.5 micrometers 11 µg/m3 24-hour 6 AM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 59 Particulate < 2.5 micrometers 13 µg/m3 24-hour 1 AM
Colorado Springs
[expand +]		 MAN Good 31 Ozone 33 PPB 8-hour 1 AM
Grand Junction
[expand +]		 GJPB Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 7 AM
Pueblo
[expand +]		 PFS Good 28 Particulate < 2.5 micrometers 5 µg/m3 24-hour 3 AM
Colorado River Valley
[expand +]		 RIFL Good 24 Particulate < 2.5 micrometers 4 µg/m3 24-hour 1 AM
Four Corners
[expand +]		 PAG Good 19 Particulate < 2.5 micrometers 3 µg/m3 24-hour 2 AM
Steamboat Springs
[expand +]		 SSMB Good 37 Particulate < 2.5 micrometers 6 µg/m3 24-hour 2 AM
Aspen
[expand +]		 ASPN Good 33 Ozone 36 PPB 8-hour 4 AM
Other
[expand +]		 DELT Moderate 51 Particulate < 2.5 micrometers 9 µg/m3 24-hour 1 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