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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 04/23/26 (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 +]		 RFN Moderate 67 Ozone 60 PPB 8-hour 7 AM
Ft. Collins - Greeley
[expand +]		 MFP Moderate 71 Ozone 61 PPB 8-hour 7 AM
Colorado Springs
[expand +]		 MAN Good 50 Ozone 54 PPB 8-hour 7 AM
Grand Junction
[expand +]		 PAL Good 41 Ozone 44 PPB 8-hour 7 AM
Pueblo
[expand +]		 PWES Good 46 Ozone 50 PPB 8-hour 7 AM
Colorado River Valley
[expand +]		 RIFL Good 43 Particulate < 2.5 micrometers 7 µg/m3 24-hour 7 AM
Four Corners
[expand +]		 CTZ Good 35 Ozone 38 PPB 8-hour 7 AM
Steamboat Springs
[expand +]		 SSMB Good 20 Particulate < 10 micrometers 22 µg/m3 24-hour 7 AM
Aspen
[expand +]		 ASPN2 Good 46 Particulate < 10 micrometers 50 µg/m3 24-hour 7 AM
Other
[expand +]		 DELT Good 35 Particulate < 10 micrometers 38 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)

Daily Highs:

Area Site Air Quality Max AQI Pollutant Conc. Period Time *
(MST)
Denver METRO
[expand +]		 RFN Moderate 67 Ozone 60 PPB 8-hour 7 AM
Ft. Collins - Greeley
[expand +]		 MFP Moderate 71 Ozone 61 PPB 8-hour 7 AM
Colorado Springs
[expand +]		 MAN Moderate 54 Ozone 56 PPB 8-hour 1 AM
Grand Junction
[expand +]		 PAL Moderate 51 Ozone 55 PPB 8-hour 1 AM
Pueblo
[expand +]		 PWES Good 50 Ozone 54 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFLO3 Good 49 Ozone 53 PPB 8-hour 1 AM
Four Corners
[expand +]		 CTZ Good 46 Ozone 50 PPB 8-hour 1 AM
Steamboat Springs
[expand +]		 SSMB Good 21 Particulate < 10 micrometers 23 µg/m3 24-hour 1 AM
Aspen
[expand +]		 ASPN Good 47 Ozone 51 PPB 8-hour 1 AM
Other
[expand +]		 DELT Good 37 Particulate < 10 micrometers 40 µg/m3 24-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