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Detailed Air Quality Summary for 11/23/17 (Today)

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 Hour:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver [+] RFN Good 32 Ozone 35 PPB 8-hour 10:00 PM
Ft. Collins - Greeley [+] GREH Moderate 51 Particulate < 2.5 micrometers 12 µg/m3 24-hour 10:00 PM
Colorado Springs [+] MAN Good 23 Ozone 25 PPB 8-hour 10:00 PM
Grand Junction [+] PAL Good 22 Ozone 24 PPB 8-hour 10:00 PM
Colorado River Valley [+] RIFL Good 19 Particulate < 2.5 micrometers 5 µg/m3 24-hour 10:00 PM
Four Corners [+] CTZ Good 16 Ozone 17 PPB 8-hour 10:00 PM
Other [+] DELT Good 33 Particulate < 2.5 micrometers 8 µg/m3 24-hour 10:00 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
[expand +]
ADM Moderate 54 Particulate < 2.5 micrometers 14 µg/m3 24-hour 1 AM
Ft. Collins - Greeley
[expand +]
GREH Moderate 53 Particulate < 2.5 micrometers 13 µg/m3 24-hour 3 AM
Colorado Springs
[expand +]
MAN Good 26 Ozone 28 PPB 8-hour 4 AM
Grand Junction
[expand +]
GJPB Good 24 Particulate < 2.5 micrometers 6 µg/m3 24-hour 1 AM
Colorado River Valley
[expand +]
RIFL Good 24 Particulate < 2.5 micrometers 6 µg/m3 24-hour 2 AM
Four Corners
[expand +]
CTZ Good 23 Ozone 25 PPB 8-hour 6 PM
Other
[expand +]
DELT Good 38 Particulate < 2.5 micrometers 9 µg/m3 24-hour 1 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
Beta Extinction
(1/km)
Time *
(MST)
Denver DES Good 13 0.020 0.018 12 PM

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