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Detailed Air Quality Summary for 07/27/25 (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 METRO
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LNGM Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 4 AM
Ft. Collins - Greeley
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PMS Moderate 60 Particulate < 2.5 micrometers 13 µg/m3 24-hour 4 AM
Colorado Springs
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MAN Good 40 Ozone 43 PPB 8-hour 4 AM
Grand Junction
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GJPB Good 49 Particulate < 2.5 micrometers 8 µg/m3 24-hour 4 AM
Pueblo
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PWES Good 29 Ozone 31 PPB 8-hour 4 AM
Colorado River Valley
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RIFL Good 35 Particulate < 2.5 micrometers 6 µg/m3 24-hour 4 AM
Four Corners
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PAG Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 4 AM
Steamboat Springs
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SSMB Good 44 Particulate < 2.5 micrometers 8 µg/m3 24-hour 4 AM
Aspen
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ASPN Good 26 Ozone 28 PPB 8-hour 4 AM
Other
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ALA Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 4 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 METRO
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LNGM Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 1 AM
Ft. Collins - Greeley
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PMS Moderate 60 Particulate < 2.5 micrometers 13 µg/m3 24-hour 2 AM
Colorado Springs
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MAN Good 40 Ozone 43 PPB 8-hour 1 AM
Grand Junction
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GJPB Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 1 AM
Pueblo
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PWES Good 33 Ozone 36 PPB 8-hour 1 AM
Colorado River Valley
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RIFL Good 42 Particulate < 2.5 micrometers 7 µg/m3 24-hour 1 AM
Four Corners
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PAG Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 4 AM
Steamboat Springs
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SSMB Moderate 51 Particulate < 2.5 micrometers 9 µg/m3 24-hour 1 AM
Aspen
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ASPN Good 28 Ozone 30 PPB 8-hour 1 AM
Other
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ALA Good 35 Particulate < 2.5 micrometers 6 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.

AQI health statements
Site information and abbreviations