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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 05/13/26 (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 Unhealthy for Sensitive Groups 101 Ozone 71 PPB 8-hour 4 PM
Ft. Collins - Greeley
[expand +]		 MFP Moderate 87 Ozone 66 PPB 8-hour 4 PM
Colorado Springs
[expand +]		 MAN Moderate 64 Ozone 59 PPB 8-hour 4 PM
Grand Junction
[expand +]		 PAL Good 50 Ozone 54 PPB 8-hour 4 PM
Pueblo
[expand +]		 PWES Moderate 74 Ozone 62 PPB 8-hour 4 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 48 Ozone 52 PPB 8-hour 4 PM
Four Corners
[expand +]		 CTZ Moderate 51 Ozone 55 PPB 8-hour 4 PM
Steamboat Springs
[expand +]		 SSMB Good 24 Particulate < 2.5 micrometers 4 µg/m3 24-hour 4 PM
Aspen
[expand +]		 ASPN2 Good 24 Particulate < 2.5 micrometers 4 µg/m3 24-hour 4 PM
Other
[expand +]		 LMB Good 47 Particulate < 10 micrometers 51 µg/m3 24-hour 4 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 +]		 RFN Unhealthy for Sensitive Groups 101 Ozone 71 PPB 8-hour 4 PM
Ft. Collins - Greeley
[expand +]		 MFP Moderate 87 Ozone 66 PPB 8-hour 4 PM
Colorado Springs
[expand +]		 MAN Moderate 64 Ozone 59 PPB 8-hour 1 AM
Grand Junction
[expand +]		 PAL Good 50 Ozone 54 PPB 8-hour 4 PM
Pueblo
[expand +]		 PWES Moderate 74 Ozone 62 PPB 8-hour 4 PM
Colorado River Valley
[expand +]		 RIFLO3 Good 48 Ozone 52 PPB 8-hour 4 PM
Four Corners
[expand +]		 CTZ Moderate 51 Ozone 55 PPB 8-hour 4 PM
Steamboat Springs
[expand +]		 SSMB Good 24 Particulate < 2.5 micrometers 4 µg/m3 24-hour 1 AM
Aspen
[expand +]		 ASPN2 Good 24 Particulate < 2.5 micrometers 4 µg/m3 24-hour 9 AM
Other
[expand +]		 LMB Moderate 52 Particulate < 10 micrometers 58 µg/m3 24-hour 7 AM

Area Site Visibility Max VSI 4-hour Average
(1/km)
 Beta Extinction
(1/km)
 Time *
(MST)
Denver DES Poor 101 0.076 0.076 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