The Infectious risk has fallen noticeably over the past 12 weeks, with the most recent week notably lower than earlier in the window..
Allergy risk activity has remained stable over the past 12 weeks in Columbia, Oregon.
No Pollution activity has been reported over the past 12 weeks in Columbia, Oregon.
Weather risk activity has been increasing over the past 12 weeks in Columbia, Oregon.
Last updated: July 6, 2026
Data refreshed weekly