Recommendations for Outdoor Physical Activity During Ozone Season (May-September)

The Utah Departments of Health and Environmental Quality have developed recommendations for outdoor physical activity in the summertime to avoid unhealthy exposure to summertime ozone.


  • The best time for outdoor summer physical activity is before noon or after 6:00 pm.
  • If you are physically active between noon and 6:00 pm:
    • Consider light to moderate activity (i.e., walking instead of running),
    • Consider indoor activities.
  • Discuss physical activities with your doctor, especially if you have a lung disease or heart condition.

Recommendations for Outdoor Physical Activities During Ozone Season (May-September)

EPA's Air Quality Index

Additional recommendations for outdoor activity based on ozone level are available here.


Fact Sheets and Resources