The Infectious risk has trended downward over the past 12 weeks, with the most recent week notably lower than earlier in the window..
Allergy risk activity has been easing over the past 12 weeks in Mercer, West Virginia.
No Pollution activity has been reported over the past 12 weeks in Mercer, West Virginia.
Weather risk activity has been climbing over the past 12 weeks in Mercer, West Virginia.
Last updated: July 13, 2026
Data refreshed weekly