The Infectious risk has eased over the past 12 weeks, with the most recent week notably lower than earlier in the window..
Allergy risk activity has stayed relatively flat over the past 12 weeks in Walla Walla, Washington.
Pollution risk activity has been climbing over the past 12 weeks in Walla Walla, Washington.
Weather risk activity has been trending upward over the past 12 weeks in Walla Walla, Washington.
Last updated: July 6, 2026
Data refreshed weekly