The Infectious risk has shown little change over the last 12 weeks, with the most recent week close to the 12-week average..
Allergy risk activity has been climbing over the past 12 weeks in Howard, Maryland.
No Pollution activity has been reported over the past 12 weeks in Howard, Maryland.
Weather risk activity has stayed relatively flat over the past 12 weeks in Howard, Maryland.
Last updated: September 7, 2026
Data refreshed weekly