The Infectious risk has held relatively steady over the last 12 weeks, with the most recent week close to the 12-week average..
Allergy risk activity has been easing over the past 12 weeks in Collin, Texas.
Pollution risk activity has remained stable over the past 12 weeks in Collin, Texas.
Weather risk activity has been decreasing over the past 12 weeks in Collin, Texas.
Last updated: August 24, 2026
Data refreshed weekly