Contra Costa County West Nile Virus Activity Archive
For more information regarding West Nile virus activity in Contra Costa County from previous years, please refer to the links below:
2023 Contra Costa County West Nile Virus Activity
2022 Contra Costa County West Nile Virus Activity
2021 Contra Costa County West Nile Virus Activity
2020 Contra Costa County West Nile Virus Activity
2019 Contra Costa County West Nile Virus Activity
2018 Contra Costa County West Nile Virus Activity
2017 Contra Costa County West Nile Virus Activity
2016 Contra Costa County West Nile Virus Activity
2015 Contra Costa County West Nile Virus Activity
2014 Contra Costa County West Nile Virus Activity
2013 Contra Costa County West Nile Virus Activity
2012 Contra Costa County West Nile Virus Activity
2011 Contra Costa County West Nile Virus Activity
2010 Conta Costa County West Nile Virus Activity
2009 Contra Costa County West Nile Virus Activity