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Detailed Air Quality Summary for 09/25/17 (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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I25DEN Good 18 Particulate < 2.5 micrometers 4 µg/m3 24-hour 11 AM
Ft. Collins - Greeley
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FTCW Good 11 Ozone 12 PPB 8-hour 11 AM
Colorado Springs
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ACAD Good 15 Ozone 16 PPB 8-hour 11 AM
Grand Junction
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PAL Good 20 Ozone 22 PPB 8-hour 11 AM
Colorado River Valley
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RIFLO3 Good 10 Ozone 11 PPB 8-hour 11 AM
Four Corners
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CTZ Good 23 Ozone 25 PPB 8-hour 11 AM
Other
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DELT Good 33 Particulate < 2.5 micrometers 8 µg/m3 24-hour 11 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
Beta Extinction
(1/km)
Time *
(MST)
No valid VSI calculations found (12pm - 4pm)

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver
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I25GLO Good 24 Nitrogen Dioxide 25 PPB 1-hour 5 AM
Ft. Collins - Greeley
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FTCW Good 19 Ozone 20 PPB 8-hour 2 AM
Colorado Springs
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ACAD Good 16 Ozone 17 PPB 8-hour 1 AM
Grand Junction
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PAL Good 31 Ozone 33 PPB 8-hour 1 AM
Colorado River Valley
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RIFLO3 Good 22 Ozone 24 PPB 8-hour 1 AM
Four Corners
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CTZ Good 27 Ozone 29 PPB 8-hour 1 AM
Other
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DELT Good 35 Particulate < 2.5 micrometers 8 µg/m3 24-hour 1 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
Beta Extinction
(1/km)
Time *
(MST)
No valid VSI calculations found (12pm - 4pm)

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