The Infectious risk has shown a gradual increase over the last 12 weeks, with the most recent week notably higher than earlier in the window..
Allergy risk activity has held steady over the past 12 weeks in Ottawa, Ohio.
No Pollution activity has been reported over the past 12 weeks in Ottawa, Ohio.
Weather risk activity has remained stable over the past 12 weeks in Ottawa, Ohio.
Last updated: August 24, 2026
Data refreshed weekly