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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 04/01/26 (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 55 Particulate < 10 micrometers 63 µg/m3 24-hour 5 PM
Ft. Collins - Greeley
[expand +]		 FTCF Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 5 PM
Colorado Springs
[expand +]		 CCOL Good 49 Particulate < 10 micrometers 53 µg/m3 24-hour 5 PM
Grand Junction
[expand +]		 PAL Good 37 Ozone 40 PPB 8-hour 5 PM
Pueblo
[expand +]		 CAN Moderate 51 Particulate < 10 micrometers 56 µg/m3 24-hour 5 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 28 Ozone 30 PPB 8-hour 5 PM
Four Corners
[expand +]		 CTZ Good 39 Ozone 42 PPB 8-hour 5 PM
Steamboat Springs
[expand +]		 SSMB Good 14 Particulate < 2.5 micrometers 2 µg/m3 24-hour 5 PM
Aspen
[expand +]		 ASPN Good 30 Ozone 32 PPB 8-hour 5 PM
Other
[expand +]		 LMB Good 42 Particulate < 10 micrometers 45 µg/m3 24-hour 5 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 METRO
[expand +]		 ACC Moderate 55 Particulate < 2.5 micrometers 11 µg/m3 24-hour 3 PM
Ft. Collins - Greeley
[expand +]		 FTCF Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 1 PM
Colorado Springs
[expand +]		 CCOL Moderate 57 Particulate < 10 micrometers 67 µg/m3 24-hour 5 AM
Grand Junction
[expand +]		 PAL Good 44 Ozone 48 PPB 8-hour 2 AM
Pueblo
[expand +]		 CAN Moderate 56 Particulate < 10 micrometers 65 µg/m3 24-hour 6 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 32 Ozone 35 PPB 8-hour 1 AM
Four Corners
[expand +]		 CTZ Good 39 Ozone 42 PPB 8-hour 5 PM
Steamboat Springs
[expand +]		 SSMB Good 21 Particulate < 2.5 micrometers 3 µg/m3 24-hour 2 AM
Aspen
[expand +]		 ASPN Good 31 Ozone 33 PPB 8-hour 1 AM
Other
[expand +]		 ALA Moderate 51 Particulate < 10 micrometers 55 µg/m3 24-hour 2 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 131 0.098 0.097 11 AM

* 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