The Infectious risk has shown little change over the past 12 weeks, with the most recent week close to the 12-week average..
Allergy risk activity has been trending downward over the past 12 weeks in Bristol, Massachusetts.
Pollution risk activity has been increasing over the past 12 weeks in Bristol, Massachusetts.
Weather risk activity has been climbing over the past 12 weeks in Bristol, Massachusetts.
Last updated: July 6, 2026
Data refreshed weekly