The Infectious risk has fallen noticeably 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 Multnomah, Oregon.
Pollution risk activity has been trending upward over the past 12 weeks in Multnomah, Oregon.
Weather risk activity has been trending upward over the past 12 weeks in Multnomah, Oregon.
Last updated: August 31, 2026
Data refreshed weekly