The Infectious risk has shown little change over the last 12 weeks, with the most recent week close to the 12-week average..
Allergy risk activity has been trending upward over the past 12 weeks in Delta, Michigan.
No Pollution activity has been reported over the past 12 weeks in Delta, Michigan.
Weather risk activity has held steady over the past 12 weeks in Delta, Michigan.
Last updated: August 31, 2026
Data refreshed weekly