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Detailed Air Quality Summary for 10/21/17 (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
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NREL Good 39 Ozone 42 PPB 8-hour 9 PM
Ft. Collins - Greeley
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FTCW Good 37 Ozone 40 PPB 8-hour 9 PM
Colorado Springs
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MAN Good 45 Ozone 49 PPB 8-hour 9 PM
Grand Junction
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PAL Good 36 Ozone 39 PPB 8-hour 9 PM
Colorado River Valley
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RIFLO3 Good 28 Ozone 30 PPB 8-hour 9 PM
Four Corners
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CTZ Good 35 Ozone 38 PPB 8-hour 9 PM
Other
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PDX Good 35 Ozone 38 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
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ADM Moderate 61 Particulate < 10 micrometers 76 µg/m3 24-hour 2 AM
Ft. Collins - Greeley
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GREH Moderate 54 Particulate < 2.5 micrometers 14 µg/m3 24-hour 1 AM
Colorado Springs
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MAN Good 50 Ozone 54 PPB 8-hour 1 PM
Grand Junction
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PAL Good 39 Ozone 42 PPB 8-hour 2 AM
Colorado River Valley
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RIFLO3 Good 35 Ozone 38 PPB 8-hour 6 PM
Four Corners
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CTZ Good 40 Ozone 43 PPB 8-hour 6 PM
Other
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ASPN Good 40 Ozone 43 PPB 8-hour 4 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
Beta Extinction
(1/km)
Time *
(MST)
Denver DES Good 22 0.028 0.023 11 AM

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