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Detailed Air Quality Summary for 07/20/18 (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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CHAT Moderate 93 Ozone 68 PPB 8-hour 7 PM
Ft. Collins - Greeley
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FTCW Moderate 97 Ozone 69 PPB 8-hour 7 PM
Colorado Springs
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ACAD Moderate 77 Ozone 63 PPB 8-hour 7 PM
Grand Junction
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PAL Good 46 Ozone 50 PPB 8-hour 7 PM
Colorado River Valley
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RIFLO3 Good 43 Ozone 46 PPB 8-hour 7 PM
Four Corners       Valid data unavailable      
Other
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ASPN2 Good 49 Particulate < 2.5 micrometers 12 µg/m3 24-hour 7 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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CHAT Moderate 97 Ozone 69 PPB 8-hour 6 PM
Ft. Collins - Greeley
[expand +]
FTCW Moderate 97 Ozone 69 PPB 8-hour 6 PM
Colorado Springs
[expand +]
ACAD Moderate 77 Ozone 63 PPB 8-hour 7 PM
Grand Junction
[expand +]
PAL Good 46 Ozone 50 PPB 8-hour 7 PM
Colorado River Valley
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RIFLO3 Good 45 Ozone 49 PPB 8-hour 5 PM
Four Corners
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CTZ Good 34 Ozone 37 PPB 8-hour 1 AM
Other
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ASPN2 Good 49 Particulate < 2.5 micrometers 12 µg/m3 24-hour 7 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
Beta Extinction
(1/km)
Time *
(MST)
Denver DES Poor 142 0.107 0.086 11 AM

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