The Infectious risk has held relatively steady over the past 12 weeks, with high levels persisting through the latest week..
Allergy risk activity has remained stable over the past 12 weeks in De Witt, Illinois.
No Pollution activity has been reported over the past 12 weeks in De Witt, Illinois.
Weather risk activity has been trending downward over the past 12 weeks in De Witt, Illinois.
Last updated: August 24, 2026
Data refreshed weekly