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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 10/10/25 (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 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 7 PM
Ft. Collins - Greeley
[expand +]		 GREH Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 7 PM
Colorado Springs
[expand +]		 MAN Good 33 Ozone 36 PPB 8-hour 7 PM
Grand Junction
[expand +]		 GJPB Good 33 Particulate < 2.5 micrometers 5 µg/m3 24-hour 7 PM
Pueblo
[expand +]		 PWES Good 38 Ozone 41 PPB 8-hour 7 PM
Colorado River Valley
[expand +]		 RIFL Good 13 Particulate < 2.5 micrometers 2 µg/m3 24-hour 7 PM
Four Corners
[expand +]		 CTZ Good 22 Ozone 24 PPB 8-hour 7 PM
Steamboat Springs
[expand +]		 SSMB Good 20 Particulate < 2.5 micrometers 3 µg/m3 24-hour 7 PM
Aspen
[expand +]		 ASPN Good 24 Ozone 26 PPB 8-hour 7 PM
Other
[expand +]		 LMB Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 7 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 +]		 BOU Moderate 58 Particulate < 2.5 micrometers 13 µg/m3 24-hour 4 AM
Ft. Collins - Greeley
[expand +]		 GREH Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 7 PM
Colorado Springs
[expand +]		 MAN Good 35 Ozone 38 PPB 8-hour 6 AM
Grand Junction
[expand +]		 GJPB Good 33 Particulate < 2.5 micrometers 6 µg/m3 24-hour 5 PM
Pueblo
[expand +]		 PWES Good 38 Ozone 41 PPB 8-hour 6 PM
Colorado River Valley
[expand +]		 RIFL Good 13 Particulate < 2.5 micrometers 2 µg/m3 24-hour 1 AM
Four Corners
[expand +]		 CTZ Good 31 Ozone 33 PPB 8-hour 1 AM
Steamboat Springs
[expand +]		 SSMB Good 20 Particulate < 2.5 micrometers 3 µg/m3 24-hour 7 PM
Aspen
[expand +]		 ASPN Good 28 Ozone 30 PPB 8-hour 1 AM
Other
[expand +]		 LMB Good 47 Particulate < 2.5 micrometers 8 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 114 0.086 0.081 11 AM

* 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