The Infectious risk has shown a gradual increase 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 Bristol, Massachusetts.
No Pollution activity has been reported over the past 12 weeks in Bristol, Massachusetts.
Weather risk activity has been decreasing over the past 12 weeks in Bristol, Massachusetts.
Last updated: August 24, 2026
Data refreshed weekly