The Infectious risk has held relatively steady over the last 12 weeks, with moderate levels persisting through the latest week..
Allergy risk activity has been easing over the past 12 weeks in Clark, South Dakota.
No Pollution activity has been reported over the past 12 weeks in Clark, South Dakota.
Weather risk activity has been decreasing over the past 12 weeks in Clark, South Dakota.
Last updated: September 28, 2026
Data refreshed weekly