Colorado Department of Public Health & Environment

Avisos en Español para todo el Estado (Colorado)

Issued for Mesa and Garfield counties
Issued at 3:01 PM MDT, Thursday, June 11, 2026

Issued by the Colorado Department of Public Health and Environment

Affected Area: Mesa and Garfield counties. Locations include, but are not limited to Grand Junction and Glenwood Springs.

Advisory in Effect: 3:00 PM MDT, Thursday, June 11, 2026 to 10:00 PM MDT, Thursday, June 11, 2026

Public Health Recommendations: Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with lung disease, such as asthma. Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy outdoor exertion.

Outlook: A weather event known as a stratospheric intrusion is occurring. During these events, ozone from high in the atmosphere is pulled to the ground, resulting in elevated ozone concentrations. Ozone is expected to be Moderate to Unhealthy for Sensitive Groups through late Thursday evening.

For the latest Colorado statewide air quality conditions, forecasts, and advisories, visit: https://www.colorado.gov/airquality/colorado_summary.aspx