The Infectious risk has climbed over the last 12 weeks, ending the period at its highest level..
Allergy risk activity has been trending downward over the past 12 weeks in New Castle, Delaware.
No Pollution activity has been reported over the past 12 weeks in New Castle, Delaware.
Weather risk activity has been increasing over the past 12 weeks in New Castle, Delaware.
Last updated: August 24, 2026
Data refreshed weekly