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West Nile Virus Activity 

2024: No WNV Activity Detected

2023WNV + Mosquito SamplesWNV + Dead Birds
Marin County02
Sonoma County616

The map below shows all West Nile virus activity for 2023.

2022 WNV Activity in Marin and Sonoma Counties

Sonoma County: 1 West Nile virus positive dead bird found in Petaluma

Marin County: None

2021 West Nile Virus Activity2020 West Nile Virus Activity

2019 No West Nile Virus Activity Detected

2018 West Nile Virus Activity2017 West Nile Virus Activity2016 West Nile Virus Activity2015 West Nile Virus Activity
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