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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 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 +]		 EVG Good 47 Ozone 51 PPB 8-hour 3 PM
Ft. Collins - Greeley
[expand +]		 LAST Good 40 Ozone 43 PPB 8-hour 3 PM
Colorado Springs
[expand +]		 ACAD Good 39 Ozone 42 PPB 8-hour 3 PM
Grand Junction
[expand +]		 PAL Good 35 Ozone 38 PPB 8-hour 3 PM
Pueblo
[expand +]		 PWES Good 42 Ozone 45 PPB 8-hour 3 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 27 Ozone 29 PPB 8-hour 3 PM
Four Corners
[expand +]		 CTZ Good 36 Ozone 39 PPB 8-hour 3 PM
Steamboat Springs
[expand +]		 SSMB Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 3 PM
Aspen
[expand +]		 ASPN Good 39 Ozone 42 PPB 8-hour 3 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 19 0.025 0.023 3 PM

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 EVG Good 47 Ozone 51 PPB 8-hour 9 AM
Ft. Collins - Greeley
[expand +]		 FTCW Good 40 Ozone 43 PPB 8-hour 1 AM
Colorado Springs
[expand +]		 MAN Good 42 Ozone 45 PPB 8-hour 5 AM
Grand Junction
[expand +]		 GJPB Good 37 Particulate < 2.5 micrometers 6 µg/m3 24-hour 1 AM
Pueblo
[expand +]		 PWES Good 42 Ozone 45 PPB 8-hour 3 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 27 Ozone 29 PPB 8-hour 3 PM
Four Corners
[expand +]		 CTZ Good 36 Ozone 39 PPB 8-hour 3 PM
Steamboat Springs
[expand +]		 SSMB Good 18 Particulate < 2.5 micrometers 3 µg/m3 24-hour 1 AM
Aspen
[expand +]		 ASPN Good 39 Ozone 42 PPB 8-hour 3 PM
Other
[expand +]		 DELT Good 33 Particulate < 2.5 micrometers 5 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 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