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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 06/27/26 (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 +]		 RFN Moderate 77 Ozone 63 PPB 8-hour 10 PM
Ft. Collins - Greeley
[expand +]		 FOS Moderate 71 Ozone 61 PPB 8-hour 10 PM
Colorado Springs
[expand +]		 ACAD Good 48 Ozone 52 PPB 8-hour 10 PM
Grand Junction
[expand +]		 PAL Moderate 80 Ozone 64 PPB 8-hour 10 PM
Pueblo
[expand +]		 PWES Good 45 Ozone 49 PPB 8-hour 10 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 50 Ozone 54 PPB 8-hour 10 PM
Four Corners
[expand +]		 CTZ Moderate 51 Ozone 55 PPB 8-hour 10 PM
Steamboat Springs
[expand +]		 SSMB Moderate 69 Particulate < 2.5 micrometers 18 µg/m3 24-hour 10 PM
Aspen
[expand +]		 ASPN2 Moderate 77 Particulate < 2.5 micrometers 22 µg/m3 24-hour 10 PM
Other
[expand +]		 ALA Moderate 53 Particulate < 10 micrometers 59 µg/m3 24-hour 10 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 +]		 RFN Moderate 77 Ozone 63 PPB 8-hour 10 PM
Ft. Collins - Greeley
[expand +]		 FOS Moderate 71 Ozone 61 PPB 8-hour 9 PM
Colorado Springs
[expand +]		 ACAD Good 48 Ozone 52 PPB 8-hour 10 PM
Grand Junction
[expand +]		 PAL Moderate 80 Ozone 64 PPB 8-hour 10 PM
Pueblo
[expand +]		 PWES Good 45 Ozone 49 PPB 8-hour 10 PM
Colorado River Valley
[expand +]		 RIFLO3 Moderate 67 Ozone 60 PPB 8-hour 7 PM
Four Corners
[expand +]		 CTZ Moderate 51 Ozone 55 PPB 8-hour 10 PM
Steamboat Springs
[expand +]		 SSMB Moderate 69 Particulate < 2.5 micrometers 18 µg/m3 24-hour 10 PM
Aspen
[expand +]		 ASPN2 Moderate 77 Particulate < 2.5 micrometers 22 µg/m3 24-hour 10 PM
Other
[expand +]		 ALA Moderate 56 Particulate < 10 micrometers 65 µg/m3 24-hour 2 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 30 0.034 0.029 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