The Infectious risk has remained broadly stable over the past 12 weeks, showing no notable shift in recent weeks..
Allergy risk activity has remained stable over the past 12 weeks in Mercer, Ohio.
Pollution risk activity has been climbing over the past 12 weeks in Mercer, Ohio.
Weather risk activity has been increasing over the past 12 weeks in Mercer, Ohio.
Last updated: July 6, 2026
Data refreshed weekly