The Infectious risk has eased over the last 12 weeks, ending the period well below its earlier peak..
Allergy risk activity has been increasing over the past 12 weeks in Washtenaw, Michigan.
Pollution risk activity has been increasing over the past 12 weeks in Washtenaw, Michigan.
Weather risk activity has held steady over the past 12 weeks in Washtenaw, Michigan.
Last updated: July 13, 2026
Data refreshed weekly