Detailed Air Quality Summary for 04/20/17

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.

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
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BOUR Good 48 Ozone 52 PPB 8-hour 6 PM
Ft. Collins - Greeley
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FTCW Good 48 Ozone 52 PPB 8-hour 6 PM
Colorado Springs
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MAN Good 48 Ozone 52 PPB 8-hour 1 AM
Grand Junction
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PAL Moderate 54 Ozone 56 PPB 8-hour 8 PM
Colorado River Valley       Valid data unavailable      
Four Corners
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CTZ Moderate 58 Ozone 57 PPB 8-hour 7 PM
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ASPN Moderate 74 Ozone 62 PPB 8-hour 5 PM

Area Site Visibility Max VSI 4-hour Average
Beta Extinction
Time *
Denver DES Moderate 66 0.058 0.083 3 PM

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