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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 06/27/25 (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 +]		 RFN Moderate 67 Ozone 60 PPB 8-hour 3 PM
Ft. Collins - Greeley
[expand +]		 FTCW Moderate 71 Ozone 61 PPB 8-hour 3 PM
Colorado Springs
[expand +]		 ACAD Moderate 51 Ozone 55 PPB 8-hour 3 PM
Grand Junction
[expand +]		 PAL Moderate 58 Ozone 57 PPB 8-hour 3 PM
Pueblo
[expand +]		 PWES Good 50 Ozone 54 PPB 8-hour 3 PM
Colorado River Valley
[expand +]		 RIFL Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 3 PM
Four Corners
[expand +]		 CTZ Good 46 Ozone 50 PPB 8-hour 3 PM
Steamboat Springs
[expand +]		 SSMB Moderate 60 Particulate < 2.5 micrometers 14 µg/m3 24-hour 3 PM
Other
[expand +]		 ASPN Good 48 Ozone 52 PPB 8-hour 3 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 78 0.064 0.062 3 PM

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 RFN Moderate 77 Ozone 63 PPB 8-hour 1 AM
Ft. Collins - Greeley
[expand +]		 FTCW Moderate 71 Ozone 61 PPB 8-hour 3 PM
Colorado Springs
[expand +]		 ACAD Moderate 51 Ozone 55 PPB 8-hour 3 PM
Grand Junction
[expand +]		 PAL Moderate 58 Ozone 57 PPB 8-hour 3 PM
Pueblo
[expand +]		 PWES Good 50 Ozone 54 PPB 8-hour 3 PM
Colorado River Valley
[expand +]		 RIFL Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 11 AM
Four Corners
[expand +]		 CTZ Good 46 Ozone 50 PPB 8-hour 3 PM
Steamboat Springs
[expand +]		 SSMB Moderate 60 Particulate < 2.5 micrometers 13 µg/m3 24-hour 12 PM
Other
[expand +]		 ASPN Good 48 Ozone 52 PPB 8-hour 3 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 78 0.065 0.063 2 PM

* All data are reported in Mountain Standard Time (MST). During daylight savings time add one hour to the reported hour.

AQI health statements
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