The Infectious risk has stayed within a narrow range over the last 12 weeks, with high levels persisting through the latest week..
Allergy risk activity has been increasing over the past 12 weeks in Union, Illinois.
No Pollution activity has been reported over the past 12 weeks in Union, Illinois.
Weather risk activity has been climbing over the past 12 weeks in Union, Illinois.
Last updated: August 24, 2026
Data refreshed weekly