Infectious risk activity has been stable over the past 12 weeks in Riverside, California.
Allergy risk activity has been increasing over the past 12 weeks in Riverside, California.
Pollution risk activity has been decreasing over the past 12 weeks in Riverside, California.
Weather risk activity has been decreasing over the past 12 weeks in Riverside, California.
Last updated: May 24, 2026
Data refreshed weekly