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Detailed Air Quality Summary for 04/22/21 (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 +]		 I25GLO Moderate 75 Particulate < 2.5 micrometers 24 µg/m3 24-hour 2 PM
Ft. Collins - Greeley
[expand +]		 FTCF Good 47 Particulate < 2.5 micrometers 11 µg/m3 24-hour 2 PM
Colorado Springs
[expand +]		 ACAD Good 33 Ozone 36 PPB 8-hour 2 PM
Grand Junction
[expand +]		 PAL Good 44 Ozone 48 PPB 8-hour 2 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 39 Ozone 42 PPB 8-hour 2 PM
Four Corners
[expand +]		 CTZ Good 49 Ozone 53 PPB 8-hour 2 PM
Other
[expand +]		 ASPN Good 45 Ozone 49 PPB 8-hour 2 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 +]		 I25GLO Moderate 75 Particulate < 2.5 micrometers 23 µg/m3 24-hour 12 PM
Ft. Collins - Greeley
[expand +]		 FTCF Good 47 Particulate < 2.5 micrometers 11 µg/m3 24-hour 2 PM
Colorado Springs
[expand +]		 ACAD Good 38 Ozone 41 PPB 8-hour 2 AM
Grand Junction
[expand +]		 PAL Good 44 Ozone 48 PPB 8-hour 2 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 39 Ozone 42 PPB 8-hour 2 PM
Four Corners
[expand +]		 CTZ Good 49 Ozone 53 PPB 8-hour 2 PM
Other
[expand +]		 ASPN Good 45 Ozone 49 PPB 8-hour 2 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.