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. |
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Current Hour:
Area | Site | Air Quality | Max AQI | Pollutant | Conc. | Period | Time * (MST) |
Four Corners |
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 [expand +] |
I25GLO | Moderate | 52 | Particulate < 2.5 micrometers | 13 µg/m3 | 24-hour | 1 AM |
Ft. Collins - Greeley [expand +] |
FTCW | Good | 44 | Ozone | 47 PPB | 8-hour | 2 AM |
Colorado Springs [expand +] |
MAN | Good | 45 | Ozone | 49 PPB | 8-hour | 5 AM |
Grand Junction [expand +] |
PAL | Good | 42 | Ozone | 45 PPB | 8-hour | 9 PM |
Colorado River Valley [expand +] |
RIFLO3 | Good | 41 | Ozone | 44 PPB | 8-hour | 6 PM |
Four Corners |
Other [expand +] |
ASPN | Good | 45 | Ozone | 49 PPB | 8-hour | 4 PM |
Area | Site | Visibility | Max VSI | 4-hour Average (1/km) |
Beta Extinction (1/km) |
Time * (MST) |
* All data are reported in Mountain Standard Time (MST). During daylight savings time add one hour to the reported hour.