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Banner with Colorado and CDPHE logos on left with text on right reading Colorado Air Quality with Department of Public Health and Environment on the next line.

Detailed Air Quality Summary for 02/21/25 (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
[expand +]		 I25DEN Moderate 81 Particulate < 2.5 micrometers 25 µg/m3 24-hour 8 AM
Ft. Collins - Greeley
[expand +]		 FTCF Moderate 58 Particulate < 2.5 micrometers 13 µg/m3 24-hour 8 AM
Colorado Springs
[expand +]		 CCOL Good 29 Particulate < 2.5 micrometers 5 µg/m3 24-hour 8 AM
Grand Junction
[expand +]		 PAL Good 22 Ozone 24 PPB 8-hour 8 AM
Pueblo
[expand +]		 CAN Moderate 51 Particulate < 2.5 micrometers 9 µg/m3 24-hour 8 AM
Colorado River Valley
[expand +]		 RIFL Good 23 Particulate < 2.5 micrometers 4 µg/m3 24-hour 8 AM
Four Corners
[expand +]		 CTZ Good 19 Ozone 21 PPB 8-hour 8 AM
Other
[expand +]		 ASPN Good 40 Ozone 43 PPB 8-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
[expand +]		 I25DEN Moderate 81 Particulate < 2.5 micrometers 25 µg/m3 24-hour 8 AM
Ft. Collins - Greeley
[expand +]		 FTCF Moderate 59 Particulate < 2.5 micrometers 14 µg/m3 24-hour 2 AM
Colorado Springs
[expand +]		 CCOL Good 37 Particulate < 2.5 micrometers 7 µg/m3 24-hour 2 AM
Grand Junction
[expand +]		 PAL Good 25 Ozone 27 PPB 8-hour 3 AM
Pueblo
[expand +]		 CAN Moderate 53 Particulate < 2.5 micrometers 10 µg/m3 24-hour 3 AM
Colorado River Valley
[expand +]		 RIFL Good 23 Particulate < 2.5 micrometers 4 µg/m3 24-hour 8 AM
Four Corners
[expand +]		 CTZ Good 34 Ozone 37 PPB 8-hour 1 AM
Other
[expand +]		 ASPN Good 44 Ozone 47 PPB 8-hour 2 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