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Four Rivers Vector Control District operates within a designated treatment area located in Southern Deschutes County. The treatment boundaries are outlined in the map below:






The treatment area covers most neighborhoods from the north end of Sunriver south to Burgess Road in La Pine and encompasses approximately 25 square miles. This area is known for its wetlands, rivers, and ponds which are ideal breeding grounds for mosquitoes.


Treatment Methods

Within the treatment area, Four Rivers Vector Control District utilizes a variety of mosquito control methods to reduce mosquito populations and minimize the risk of mosquito-borne diseases. These methods include:

  • Larviciding: Treating mosquito breeding sites with larvicides to kill mosquito larvae before they develop into adults.

  • Adulticiding: Spraying insecticides to kill adult mosquitoes.

  • Source Reduction: Eliminating or reducing mosquito breeding habitats, such as standing water.


Community Involvement

We encourage residents within the treatment area to be proactive in mosquito control efforts by:

  • Eliminating Standing Water: Regularly emptying containers that collect water, such as flower pots, bird baths, and gutters.

  • Using Mosquito Repellent: Applying EPA-approved mosquito repellent when spending time outdoors.

  • Reporting Mosquito Activity: Notifying Four Rivers Vector Control District of any areas with high mosquito activity or potential breeding sites.


Contact Us

If you have any questions or concerns about mosquito control within the treatment area, please don't hesitate to contact us. We are here to serve you and are committed to protecting public health and safety through effective mosquito control.

Thank you for your cooperation in keeping our community safe from mosquito-borne diseases.

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