Colorado
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Detailed Air Quality Summary for 12/30/25 (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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ADB Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 8 AM
Ft. Collins - Greeley
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GREH Moderate 58 Particulate < 2.5 micrometers 13 µg/m3 24-hour 8 AM
Colorado Springs
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MAN Good 36 Ozone 39 PPB 8-hour 8 AM
Grand Junction
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GJPB Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 8 AM
Pueblo
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CAN Good 28 Particulate < 2.5 micrometers 5 µg/m3 24-hour 8 AM
Colorado River Valley       Valid data unavailable      
Four Corners
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PAG Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 8 AM
Steamboat Springs
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SSMB Good 30 Particulate < 2.5 micrometers 5 µg/m3 24-hour 8 AM
Aspen
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ASPN Good 36 Ozone 39 PPB 8-hour 8 AM
Other
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ALA Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 8 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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ADB Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 7 AM
Ft. Collins - Greeley
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GREH Moderate 58 Particulate < 2.5 micrometers 12 µg/m3 24-hour 7 AM
Colorado Springs
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MAN Good 36 Ozone 39 PPB 8-hour 7 AM
Grand Junction
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GJPB Good 27 Particulate < 2.5 micrometers 4 µg/m3 24-hour 8 AM
Pueblo
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CAN Good 33 Particulate < 2.5 micrometers 5 µg/m3 24-hour 1 AM
Colorado River Valley       Valid data unavailable      
Four Corners
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PAG Good 17 Particulate < 2.5 micrometers 3 µg/m3 24-hour 3 AM
Steamboat Springs
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SSMB Good 30 Particulate < 2.5 micrometers 5 µg/m3 24-hour 8 AM
Aspen
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ASPN Good 36 Ozone 39 PPB 8-hour 6 AM
Other
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ALA Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 7 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