The Infectious risk has stayed within a narrow range over the last 12 weeks, with the most recent week close to the 12-week average..
Allergy risk activity has held steady over the past 12 weeks in DuPage, Illinois.
Pollution risk activity has been trending upward over the past 12 weeks in DuPage, Illinois.
Weather risk activity has been easing over the past 12 weeks in DuPage, Illinois.
Last updated: August 24, 2026
Data refreshed weekly