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 09/13/25 (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 Good 31 Ozone 33 PPB 8-hour 6 AM
Ft. Collins - Greeley
[expand +]		 MFP Good 29 Ozone 31 PPB 8-hour 6 AM
Colorado Springs
[expand +]		 MAN Good 30 Ozone 32 PPB 8-hour 6 AM
Grand Junction
[expand +]		 PAL Good 18 Ozone 19 PPB 8-hour 6 AM
Pueblo
[expand +]		 PWES Good 27 Ozone 29 PPB 8-hour 6 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 8 Ozone 9 PPB 8-hour 6 AM
Four Corners
[expand +]		 CTZ Good 31 Ozone 33 PPB 8-hour 6 AM
Steamboat Springs
[expand +]		 SSMB Good 11 Particulate < 2.5 micrometers 1 µg/m3 24-hour 6 AM
Aspen
[expand +]		 ASPN Good 19 Ozone 21 PPB 8-hour 6 AM
Other
[expand +]		 LMB Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 6 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 +]		 AURE Good 38 Ozone 41 PPB 8-hour 1 AM
Ft. Collins - Greeley
[expand +]		 FTCW Good 33 Ozone 36 PPB 8-hour 1 AM
Colorado Springs
[expand +]		 MAN Good 36 Ozone 39 PPB 8-hour 1 AM
Grand Junction
[expand +]		 PAL Good 27 Ozone 29 PPB 8-hour 1 AM
Pueblo
[expand +]		 PWES Good 33 Ozone 36 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 16 Ozone 17 PPB 8-hour 1 AM
Four Corners
[expand +]		 CTZ Good 31 Ozone 33 PPB 8-hour 5 AM
Steamboat Springs
[expand +]		 SSMB Good 11 Particulate < 2.5 micrometers 1 µg/m3 24-hour 1 AM
Aspen
[expand +]		 ASPN Good 26 Ozone 28 PPB 8-hour 1 AM
Other
[expand +]		 LMB Good 28 Particulate < 2.5 micrometers 5 µg/m3 24-hour 1 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