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Detailed Air Quality Summary for 09/23/18

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.

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 RFN Moderate 71 Ozone 61 PPB 8-hour 6 PM
Ft. Collins - Greeley
[expand +]		 GREH Moderate 53 Particulate < 2.5 micrometers 13 µg/m3 24-hour 10 AM
Colorado Springs
[expand +]		 ACAD Moderate 54 Ozone 56 PPB 8-hour 5 PM
Grand Junction
[expand +]		 PAL Good 43 Ozone 46 PPB 8-hour 6 PM
Pueblo       Valid data unavailable      
Colorado River Valley
[expand +]		 RIFLO3 Good 40 Ozone 43 PPB 8-hour 6 PM
Four Corners
[expand +]		 CTZ Good 47 Ozone 51 PPB 8-hour 6 PM
Other
[expand +]		 PDX Good 44 Ozone 47 PPB 8-hour 8 PM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 102 0.076 0.049 11 AM

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