CDPHE Air Pollution Control Division

Higher ozone is expected for parts of the Front Range today, due to a weather phenomenon known as a stratospheric intrusion.

An Air Quality Health Advisory is in effect for the Front Range today. For details, visit our website: https://www.colorado.gov/airquality/colo_advisory.aspx

Visit CDPHE's website for more information on stratospheric intrusions: https://cdphe.colorado.gov/ozone-pollution-and-your-health

An Air Quality Health Advisory for Ozone has been issued for Teller, El Paso, Pueblo, and eastern Fremont Counties. Take it easy outdoors in these areas on Saturday.
https://www.colorado.gov/airquality/colo_advisory.aspx

An Ozone Action Day Alert is in effect until Midnight Friday night. Ozone may reach the Unhealthy for Sensitive Groups category in Denver, Greeley, and surrounding areas.

For more information: https://www.colorado.gov/airquality/advisory.aspx?county=weld