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19,603

number of acres treated in the 2024 season

We are proud to announce that we have treated 10,855 acres, including marshes and waterways. Our dedicated team has achieved this through manual treatments on foot and ULV fog truck applications.

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Who are we?

Four Rivers Vector Control District is an Oregon Special District that was formed by petition in 1985. The District was established to monitor and control mosquito populations in order to reduce the risk of mosquito-borne diseases, such as malaria, dengue fever, Zika virus, and West Nile Virus. Four Rivers Vector Control District conducts surveillance to monitor mosquito populations, identify potential breeding sites, and implement control measures such as larviciding, adulticiding, and source reduction to help reduce the number of mosquitos and prevent the spread of diseases.

Mosquito Facts

Did you know that mosquitos are the deadliest animals on the planet, responsible for nearly 1 million deaths each year? 

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Learn more about these tiny but dangerous creatures and how to protect yourself from bites on our frequently asked questions page.

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How do I?

Looking for answers? Find the links to our most used forms below. Whether you're looking for our service request list or looking for our contact information, we've got you covered.

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