The Infectious risk has trended steadily upward over the last 12 weeks, with the most recent week notably higher than earlier in the window..
Allergy risk activity has been trending upward over the past 12 weeks in Essex, Massachusetts.
No Pollution activity has been reported over the past 12 weeks in Essex, Massachusetts.
Weather risk activity has been easing over the past 12 weeks in Essex, Massachusetts.
Last updated: August 24, 2026
Data refreshed weekly