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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 11/20/24 (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 +]		 BHWK Good 45 Ozone 49 PPB 8-hour 11 PM
Ft. Collins - Greeley
[expand +]		 GREH Good 33 Particulate < 2.5 micrometers 6 µg/m3 24-hour 11 PM
Colorado Springs
[expand +]		 MAN Good 31 Ozone 34 PPB 8-hour 11 PM
Grand Junction
[expand +]		 PAL Good 31 Ozone 33 PPB 8-hour 11 PM
Pueblo
[expand +]		 PFS Good 26 Particulate < 2.5 micrometers 5 µg/m3 24-hour 11 PM
Colorado River Valley
[expand +]		 RIFL Good 26 Particulate < 2.5 micrometers 5 µg/m3 24-hour 11 PM
Four Corners
[expand +]		 CTZ Good 20 Ozone 22 PPB 8-hour 11 PM
Other
[expand +]		 ASPN Good 34 Ozone 37 PPB 8-hour 11 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 +]		 I25DEN Good 45 Nitrogen Dioxide 48 PPB 1-hour 7 PM
Ft. Collins - Greeley
[expand +]		 FTCW Good 39 Ozone 42 PPB 8-hour 1 AM
Colorado Springs
[expand +]		 ACAD Good 40 Ozone 43 PPB 8-hour 1 AM
Grand Junction
[expand +]		 PAL Good 35 Ozone 38 PPB 8-hour 7 PM
Pueblo
[expand +]		 PWES Good 33 Ozone 36 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFL Good 29 Particulate < 2.5 micrometers 5 µg/m3 24-hour 4 AM
Four Corners
[expand +]		 CTZ Good 33 Ozone 36 PPB 8-hour 5 PM
Other
[expand +]		 ASPN Good 37 Ozone 40 PPB 8-hour 4 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Moderate 65 0.058 0.057 12 PM

* 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