West Nile Virus Activity Reports
2023 WNV Activity in Marin and Sonoma Counties
Sonoma County: None
Marin County: None
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