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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 06/28/26 (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 +]		 BOU Moderate 62 Particulate < 2.5 micrometers 15 µg/m3 24-hour 4 AM
Ft. Collins - Greeley
[expand +]		 FTCF Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 4 AM
Colorado Springs
[expand +]		 MAN Good 45 Ozone 49 PPB 8-hour 4 AM
Grand Junction
[expand +]		 PAL Good 48 Ozone 52 PPB 8-hour 4 AM
Pueblo
[expand +]		 PWES Good 44 Ozone 48 PPB 8-hour 4 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 33 Ozone 36 PPB 8-hour 4 AM
Four Corners
[expand +]		 CTZ Good 48 Ozone 52 PPB 8-hour 4 AM
Steamboat Springs
[expand +]		 SSMB Moderate 76 Particulate < 2.5 micrometers 22 µg/m3 24-hour 4 AM
Aspen
[expand +]		 ASPN2 Unhealthy for Sensitive Groups 103 Particulate < 2.5 micrometers 36 µg/m3 24-hour 4 AM
Other
[expand +]		 DELT Moderate 69 Particulate < 2.5 micrometers 19 µg/m3 24-hour 4 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 +]		 RFN Moderate 64 Ozone 59 PPB 8-hour 1 AM
Ft. Collins - Greeley
[expand +]		 FTC Moderate 58 Ozone 57 PPB 8-hour 1 AM
Colorado Springs
[expand +]		 MAN Good 46 Ozone 50 PPB 8-hour 1 AM
Grand Junction
[expand +]		 PAL Moderate 64 Ozone 59 PPB 8-hour 1 AM
Pueblo
[expand +]		 PWES Good 44 Ozone 47 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 42 Ozone 45 PPB 8-hour 1 AM
Four Corners
[expand +]		 CTZ Good 50 Ozone 54 PPB 8-hour 1 AM
Steamboat Springs
[expand +]		 SSMB Moderate 76 Particulate < 2.5 micrometers 22 µg/m3 24-hour 4 AM
Aspen
[expand +]		 ASPN2 Unhealthy for Sensitive Groups 103 Particulate < 2.5 micrometers 36 µg/m3 24-hour 4 AM
Other
[expand +]		 DELT Moderate 69 Particulate < 2.5 micrometers 19 µg/m3 24-hour 4 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