Infectious Diseases prevalence is Extreme in Seattle, and Moderate in Everett and Tacoma.
Allergy prevalence is Low in Seattle, Everett, and Tacoma.
Pollution prevalence is Low in Seattle, Everett, and Tacoma.
Severe Weather prevalence is Low in Seattle, Everett, and Tacoma.
Last updated: October 14, 2026
Data refreshed weekly