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 05/18/26 (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 32 Ozone 35 PPB 8-hour 9 PM
Ft. Collins - Greeley
[expand +]		 MFP Good 31 Ozone 33 PPB 8-hour 9 PM
Colorado Springs
[expand +]		 MAN Good 30 Ozone 32 PPB 8-hour 9 PM
Grand Junction
[expand +]		 PAL Good 31 Ozone 33 PPB 8-hour 9 PM
Pueblo
[expand +]		 PWES Good 32 Ozone 35 PPB 8-hour 9 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 29 Ozone 31 PPB 8-hour 9 PM
Four Corners
[expand +]		 CTZ Moderate 87 Ozone 66 PPB 8-hour 9 PM
Steamboat Springs
[expand +]		 SSMB Good 10 Particulate < 2.5 micrometers 1 µg/m3 24-hour 9 PM
Aspen
[expand +]		 ASPN Good 44 Ozone 47 PPB 8-hour 9 PM
Other
[expand +]		 ALA Unhealthy for Sensitive Groups 102 Particulate < 10 micrometers 157 µg/m3 24-hour 9 PM

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 +]		 EVG Good 47 Ozone 51 PPB 8-hour 1 AM
Ft. Collins - Greeley
[expand +]		 MFP Good 44 Ozone 48 PPB 8-hour 1 AM
Colorado Springs
[expand +]		 MAN Good 48 Ozone 52 PPB 8-hour 1 AM
Grand Junction
[expand +]		 PAL Moderate 54 Ozone 56 PPB 8-hour 12 PM
Pueblo
[expand +]		 PWES Good 46 Ozone 50 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 50 Ozone 54 PPB 8-hour 1 PM
Four Corners
[expand +]		 CTZ Moderate 100 Ozone 70 PPB 8-hour 7 PM
Steamboat Springs
[expand +]		 SSMB Good 12 Particulate < 2.5 micrometers 2 µg/m3 24-hour 1 PM
Aspen
[expand +]		 ASPN Moderate 71 Ozone 61 PPB 8-hour 4 PM
Other
[expand +]		 ALA Unhealthy for Sensitive Groups 102 Particulate < 10 micrometers 157 µg/m3 24-hour 9 PM

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