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Mosquito biting skin

West Nile Virus

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Reduce your exposure to mosquitoes.

In August 2018, Washington State Department of Health detected West Nile virus in mosquito samples from the Gog-le-hi-te Wetlands on the Tacoma tide flats. Samples taken later that season tested negative for the virus.

This summer, we partnered with the Department of Health to increase West Nile virus testing. We take mosquito samples from even more sites around Pierce County, to better detect risk of West Nile virus.

All samples taken this year—including those from the Gog-le-hi-te Wetlands—tested negative for the virus. Even so, West Nile virus still poses a risk to our community. Read more below to learn how to protect yourself from mosquito bites.

What is West Nile Virus? How it spreads. How to protect yourself.


  • How is West Nile virus spread?
  • What are the symptoms of West Nile virus?
  • Who’s most at risk for West Nile virus?
  • How can I protect myself?
  • What is an effective mosquito repellent?
  • Do birds infected with West Nile virus die?
  • Are dead birds tested for West Nile virus?
  • Can West Nile virus infect my pet?