The Infectious risk has risen noticeably over the past 12 weeks, ending the period at its highest level..
Allergy risk activity has been easing over the past 12 weeks in Pierce, Washington.
Pollution risk activity has been trending upward over the past 12 weeks in Pierce, Washington.
Weather risk activity has been increasing over the past 12 weeks in Pierce, Washington.
Last updated: August 24, 2026
Data refreshed weekly