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Detailed Air Quality Summary for 03/04/21 (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
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SWAN Moderate 52 Particulate < 10 micrometers 57 µg/m3 24-hour 9 PM
Ft. Collins - Greeley
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PAO Good 37 Ozone 40 PPB 8-hour 9 PM
Colorado Springs
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ACAD Good 36 Ozone 39 PPB 8-hour 9 PM
Grand Junction
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PAL Good 40 Ozone 43 PPB 8-hour 9 PM
Colorado River Valley
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RIFLO3 Good 34 Ozone 37 PPB 8-hour 9 PM
Four Corners
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CTZ Good 36 Ozone 39 PPB 8-hour 9 PM
Other
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ASPN Good 40 Ozone 43 PPB 8-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
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SWAN Moderate 55 Particulate < 10 micrometers 64 µg/m3 24-hour 4 PM
Ft. Collins - Greeley
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GREH Good 49 Particulate < 10 micrometers 53 µg/m3 24-hour 12 PM
Colorado Springs
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ACAD Good 36 Ozone 39 PPB 8-hour 9 PM
Grand Junction
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PAL Good 42 Ozone 45 PPB 8-hour 6 PM
Colorado River Valley
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RIFLO3 Good 39 Ozone 42 PPB 8-hour 7 PM
Four Corners
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CTZ Good 40 Ozone 43 PPB 8-hour 7 PM
Other
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ASPN2 Moderate 53 Particulate < 10 micrometers 60 µg/m3 24-hour 3 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
Beta Extinction
(1/km)
Time *
(MST)
Denver DES Moderate 100 0.075 0.064 12 PM

* All data are reported in Mountain Standard Time (MST). During daylight savings time add one hour to the reported hour.