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Detailed Air Quality Summary for 09/19/17 (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 Moderate 77 Ozone 63 PPB 8-hour 5 PM
Ft. Collins - Greeley
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FTCW Good 44 Ozone 48 PPB 8-hour 5 PM
Colorado Springs
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ACAD Good 47 Ozone 51 PPB 8-hour 5 PM
Grand Junction
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PAL Good 44 Ozone 48 PPB 8-hour 5 PM
Colorado River Valley
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RIFLO3 Good 44 Ozone 47 PPB 8-hour 5 PM
Four Corners
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CTZ Good 44 Ozone 48 PPB 8-hour 5 PM
Other
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DELT Unhealthy for Sensitive Groups 133 Particulate < 2.5 micrometers 49 µg/m3 24-hour 5 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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RFN Moderate 77 Ozone 63 PPB 8-hour 5 PM
Ft. Collins - Greeley
[expand +]
FTCW Good 45 Ozone 49 PPB 8-hour 1 AM
Colorado Springs
[expand +]
ACAD Good 47 Ozone 51 PPB 8-hour 5 PM
Grand Junction
[expand +]
PAL Good 48 Ozone 52 PPB 8-hour 1 AM
Colorado River Valley
[expand +]
RIFLO3 Good 44 Ozone 47 PPB 8-hour 4 PM
Four Corners
[expand +]
CTZ Good 44 Ozone 48 PPB 8-hour 5 PM
Other
[expand +]
DELT Unhealthy for Sensitive Groups 133 Particulate < 2.5 micrometers 49 µg/m3 24-hour 4 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
Beta Extinction
(1/km)
Time *
(MST)
Denver DES Good 30 0.034 0.025 11 AM

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