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 03/18/26 (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 +]		 NREL Good 48 Ozone 52 PPB 8-hour 9 PM
Ft. Collins - Greeley
[expand +]		 FTCW Good 44 Ozone 47 PPB 8-hour 9 PM
Colorado Springs
[expand +]		 MAN Good 49 Ozone 53 PPB 8-hour 9 PM
Grand Junction
[expand +]		 PAL Good 41 Ozone 44 PPB 8-hour 9 PM
Pueblo
[expand +]		 PWES Good 39 Ozone 42 PPB 8-hour 9 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 36 Ozone 39 PPB 8-hour 9 PM
Four Corners
[expand +]		 CTZ Good 39 Ozone 42 PPB 8-hour 9 PM
Steamboat Springs
[expand +]		 SSMB Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 9 PM
Aspen
[expand +]		 ASPN Good 41 Ozone 44 PPB 8-hour 9 PM
Other
[expand +]		 DELT Good 33 Particulate < 2.5 micrometers 6 µg/m3 24-hour 9 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 +]		 NREL Good 48 Ozone 52 PPB 8-hour 9 PM
Ft. Collins - Greeley
[expand +]		 LAST Good 46 Ozone 50 PPB 8-hour 7 PM
Colorado Springs
[expand +]		 MAN Good 49 Ozone 53 PPB 8-hour 7 PM
Grand Junction
[expand +]		 PAL Good 44 Ozone 47 PPB 8-hour 7 PM
Pueblo
[expand +]		 PWES Good 44 Ozone 48 PPB 8-hour 5 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 39 Ozone 42 PPB 8-hour 7 PM
Four Corners
[expand +]		 CTZ Good 42 Ozone 45 PPB 8-hour 7 PM
Steamboat Springs
[expand +]		 SSMB Good 18 Particulate < 2.5 micrometers 3 µg/m3 24-hour 1 AM
Aspen
[expand +]		 ASPN Good 42 Ozone 45 PPB 8-hour 7 PM
Other
[expand +]		 DELT Good 33 Particulate < 2.5 micrometers 5 µg/m3 24-hour 3 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Good 43 0.044 0.027 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