Colorado
Translate
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 07/27/25 (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 +]		 LNGM Good 47 Particulate < 2.5 micrometers 8 µg/m3 24-hour 4 AM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 60 Particulate < 2.5 micrometers 13 µg/m3 24-hour 4 AM
Colorado Springs
[expand +]		 MAN Good 40 Ozone 43 PPB 8-hour 4 AM
Grand Junction
[expand +]		 GJPB Good 49 Particulate < 2.5 micrometers 8 µg/m3 24-hour 4 AM
Pueblo
[expand +]		 PWES Good 29 Ozone 31 PPB 8-hour 4 AM
Colorado River Valley
[expand +]		 RIFL Good 35 Particulate < 2.5 micrometers 6 µg/m3 24-hour 4 AM
Four Corners
[expand +]		 PAG Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 4 AM
Steamboat Springs
[expand +]		 SSMB Good 44 Particulate < 2.5 micrometers 8 µg/m3 24-hour 4 AM
Aspen
[expand +]		 ASPN Good 26 Ozone 28 PPB 8-hour 4 AM
Other
[expand +]		 ALA Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 4 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 +]		 LNGM Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 1 AM
Ft. Collins - Greeley
[expand +]		 PMS Moderate 60 Particulate < 2.5 micrometers 13 µg/m3 24-hour 2 AM
Colorado Springs
[expand +]		 MAN Good 40 Ozone 43 PPB 8-hour 1 AM
Grand Junction
[expand +]		 GJPB Moderate 52 Particulate < 2.5 micrometers 9 µg/m3 24-hour 1 AM
Pueblo
[expand +]		 PWES Good 33 Ozone 36 PPB 8-hour 1 AM
Colorado River Valley
[expand +]		 RIFL Good 42 Particulate < 2.5 micrometers 7 µg/m3 24-hour 1 AM
Four Corners
[expand +]		 PAG Good 32 Particulate < 2.5 micrometers 5 µg/m3 24-hour 4 AM
Steamboat Springs
[expand +]		 SSMB Moderate 51 Particulate < 2.5 micrometers 9 µg/m3 24-hour 1 AM
Aspen
[expand +]		 ASPN Good 28 Ozone 30 PPB 8-hour 1 AM
Other
[expand +]		 ALA Good 35 Particulate < 2.5 micrometers 6 µg/m3 24-hour 1 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