The Infectious risk has trended downward over the past 12 weeks, ending the period well below its earlier peak..
Allergy risk activity has been easing over the past 12 weeks in Mason, Washington.
No Pollution activity has been reported over the past 12 weeks in Mason, Washington.
Weather risk activity has been climbing over the past 12 weeks in Mason, Washington.
Last updated: July 6, 2026
Data refreshed weekly