Infectious risk activity has been decreasing over the past 12 weeks in Grundy, Illinois.
Allergy risk activity has been increasing over the past 12 weeks in Grundy, Illinois.
No Pollution activity has been reported over the past 12 weeks in Grundy, Illinois.
Weather risk activity has been increasing over the past 12 weeks in Grundy, Illinois.
Last updated: May 25, 2026
Data refreshed weekly