Health Department: Spraying for Mosquitoes Took Place Saturday, No Health Risks Expected

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 10/06/2019 - 09:59

A small portion of Webster and Northfield Townships in northern Washtenaw County was treated with aerial spraying, Saturday, Oct. 5, to control for mosquitoes that carry Eastern Equine Encephalitis, or EEE.


Aerial spraying is being carried out in parts of the state with confirmed human or animal cases of EEE to decrease mosquitoes that can carry the potentially deadly virus. As of Oct. 6, Washtenaw County has no human or animal cases of EEE. The area targeted for spraying in Washtenaw County is within a 2.5 mile radius of a confirmed animal case in neighboring Livingston County. 


No hard frost is expected for several weeks in lower Michigan. Additionally, mosquito trappings this week indicated that the mosquitoes known to spread EEE were still active, which is unusual for this time of year. No short-term or long-term risks to human health are expected during or after spraying. Application conducted at night will minimize risk to daytime foragers such as bees.


We strongly encourage preventing mosquito bites whenever possible.

Details about the EEE outbreak in Michigan and the situation in Washtenaw County are available on our website and at

Washtenaw County Health Department's picture
Washtenaw County Health Department
The Washtenaw County Health Department promotes health and works to prevent disease and injury for all in our community. Our mission is to assure, in partnership with the community, the conditions necessary for people to live healthy lives through prevention and protection programs. Washtenaw County Health Department (WCHD) plays a critical role in all of our lives and exists to provide our community with the tools, information, resources and opportunities to make positive health changes.

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