Infectious risk activity has been increasing over the past 12 weeks in Lassen, California.
Allergy risk activity has been increasing over the past 12 weeks in Lassen, California.
No Pollution activity has been reported over the past 12 weeks in Lassen, California.
Weather risk activity has been increasing over the past 12 weeks in Lassen, California.
Last updated: May 24, 2026
Data refreshed weekly