The Infectious risk has held relatively steady over the last 12 weeks, with moderate levels persisting through the latest week..
Allergy risk activity has held steady over the past 12 weeks in Harrison, Missouri.
No Pollution activity has been reported over the past 12 weeks in Harrison, Missouri.
Weather risk activity has been easing over the past 12 weeks in Harrison, Missouri.
Last updated: August 31, 2026
Data refreshed weekly