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Detailed Air Quality Summary for 08/23/17 (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
[expand +]		 HLD Moderate 64 Ozone 59 PPB 8-hour 4 PM
Ft. Collins - Greeley
[expand +]		 FTCF Moderate 61 Particulate < 2.5 micrometers 17 µg/m3 24-hour 4 PM
Colorado Springs
[expand +]		 CCOL Good 34 Particulate < 2.5 micrometers 8 µg/m3 24-hour 4 PM
Grand Junction
[expand +]		 PAL Good 41 Ozone 44 PPB 8-hour 4 PM
Colorado River Valley       Valid data unavailable      
Four Corners
[expand +]		 CTZ Good 43 Ozone 46 PPB 8-hour 4 PM
Other
[expand +]		 DELT Good 35 Particulate < 2.5 micrometers 9 µg/m3 24-hour 4 PM

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
[expand +]		 HLD Moderate 64 Ozone 59 PPB 8-hour 4 PM
Ft. Collins - Greeley
[expand +]		 FTCF Moderate 63 Particulate < 2.5 micrometers 18 µg/m3 24-hour 3 AM
Colorado Springs
[expand +]		 CCOL Good 44 Particulate < 2.5 micrometers 11 µg/m3 24-hour 2 AM
Grand Junction
[expand +]		 PAL Good 41 Ozone 44 PPB 8-hour 4 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 30 Ozone 32 PPB 8-hour 1 AM
Four Corners
[expand +]		 CTZ Good 43 Ozone 46 PPB 8-hour 4 PM
Other
[expand +]		 ELK Good 41 Ozone 45 PPB 8-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.