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 10/04/26 (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 Good 37 Particulate < 10 micrometers 40 µg/m3 24-hour 10 AM
Ft. Collins - Greeley
[expand +]		 GREH Good 46 Particulate < 2.5 micrometers 8 µg/m3 24-hour 10 AM
Colorado Springs
[expand +]		 MAN Good 27 Ozone 29 PPB 8-hour 10 AM
Grand Junction
[expand +]		 PAL Good 25 Ozone 27 PPB 8-hour 10 AM
Pueblo
[expand +]		 PFS Good 22 Particulate < 2.5 micrometers 3 µg/m3 24-hour 10 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 16 Ozone 17 PPB 8-hour 10 AM
Four Corners
[expand +]		 PAG Good 26 Particulate < 2.5 micrometers 4 µg/m3 24-hour 10 AM
Steamboat Springs
[expand +]		 SSMB Good 30 Particulate < 2.5 micrometers 5 µg/m3 24-hour 10 AM
Aspen
[expand +]		 ASPN2 Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 10 AM
Other
[expand +]		 DELT Good 28 Particulate < 2.5 micrometers 5 µg/m3 24-hour 10 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 +]		 NREL Good 41 Ozone 44 PPB 8-hour 1 AM
Ft. Collins - Greeley
[expand +]		 GREH Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 5 AM
Colorado Springs
[expand +]		 MAN Good 38 Ozone 41 PPB 8-hour 1 AM
Grand Junction
[expand +]		 PAL Good 35 Ozone 38 PPB 8-hour 1 AM
Pueblo
[expand +]		 PWES Good 31 Ozone 33 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 22 Ozone 24 PPB 8-hour 1 AM
Four Corners
[expand +]		 PAG Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 6 AM
Steamboat Springs
[expand +]		 SSMB Good 30 Particulate < 2.5 micrometers 5 µg/m3 24-hour 10 AM
Aspen
[expand +]		 ASPN2 Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 9 AM
Other
[expand +]		 DELT Good 28 Particulate < 2.5 micrometers 5 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)

* 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