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Detailed Air Quality Summary for 08/22/17 (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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RFN Unhealthy for Sensitive Groups 108 Ozone 74 PPB 8-hour 7 PM
Ft. Collins - Greeley
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GREH Moderate 58 Particulate < 2.5 micrometers 16 µg/m3 24-hour 7 PM
Colorado Springs
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ACAD Good 43 Ozone 46 PPB 8-hour 7 PM
Grand Junction
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PAL Good 43 Ozone 46 PPB 8-hour 7 PM
Colorado River Valley       Valid data unavailable      
Four Corners
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CTZ Good 43 Ozone 47 PPB 8-hour 7 PM
Other
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ELK Good 46 Ozone 50 PPB 8-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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NREL Unhealthy for Sensitive Groups 112 Ozone 74 PPB 8-hour 6 PM
Ft. Collins - Greeley
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GREH Moderate 60 Particulate < 2.5 micrometers 16 µg/m3 24-hour 11 AM
Colorado Springs
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ACAD Good 43 Ozone 46 PPB 8-hour 7 PM
Grand Junction
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PAL Good 44 Ozone 47 PPB 8-hour 5 PM
Colorado River Valley
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RIFLO3 Good 41 Ozone 44 PPB 8-hour 4 PM
Four Corners
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CTZ Good 43 Ozone 47 PPB 8-hour 7 PM
Other
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ELK Good 46 Ozone 50 PPB 8-hour 7 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
Beta Extinction
(1/km)
Time *
(MST)
Denver DES Poor 165 0.124 0.108 11 AM

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