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Vector Control District
Vector Control District

West Nile Virus Activity in the County

We conduct adult-mosquito-control treatments (AMTs) only when we detect a positive West Nile virus (WNV) infected mosquito, permitting weather conditions. We use these treatments to reduce the risk of human infection. Treatments must be performed as quickly as possible to protect public health and safety, and prevent illness and even death.

Whenever we conduct an AMT, you can access links to our press releases, pesticides used, and treatment maps listed in the chart below. If you are interested in subscribing to our adult-mosquito-control treatment notifications, view our frequently asked questions, or have questions about WNV and mosquito control, please see the additional information section at the bottom of this page.

WNV "season" usually begins around spring and lasts until early fall. For a list of treatments conducted in 2023, please visit our Previous West Nile Virus Treatments page.

2024 Adult-Mosquito-Control Treatments

ProgressTreatment Date and LocationTreatment 
Zip Codes		Treatment Map LinkPress Release LinkTranslationsPesticide UsedPesticide LabelPesticide Safety 
Data Sheet
upcoming updated
Date: 9/12/24

Location:
Sunnyvale and Santa Clara		94085, 94086, 94087, and 95051Interactive MapPress ReleaseEspañol
tiếng Việt
中文
Tagalog		ZenivexLabelSafety Data Sheet
upcoming updated
Date: 9/10/24

Location:
San José		95120Interactive MapPress ReleaseEspañol
tiếng Việt
中文
Tagalog		ZenivexLabelSafety Data Sheet
completed updated
Date: 9/4/24

Location:
San José		95110, 95124, 95125, 95126 and 95128Interactive MapPress ReleaseEspañol
tiếng Việt
中文
Tagalog		ZenivexLabelSafety Data Sheet
completed updated
Date: 8/29/24

Location:
San José		95112, 95131, and 95133Interactive MapPress ReleaseEspañol
tiếng Việt
中文
Tagalog		ZenivexLabelSafety Data Sheet
completed updated
Date: 8/28/24

Location:
San José and Unincorporated Santa Clara County		95116, 95127, 95132 and 95133Interactive MapPress ReleaseEspañol
tiếng Việt
中文
Tagalog		ZenivexLabelSafety Data Sheet
completed updated
Date: 8/26/24

Location:
Palo Alto		94301, 94303, and 94306Interactive MapPress ReleaseEspañol
tiếng Việt
中文
Tagalog		Merus 3.0 Label Safety Data Sheet
completed updated
Date: 8/22/24

Location:
San José and Unincorporated Santa Clara County		95111, 95112, 95125, and 95136Interactive MapPress ReleaseEspañol
tiếng Việt
中文
Tagalog		ZenivexLabelSafety Data Sheet
completed updated
Date: 8/20/24

Location:
San José 		95123Interactive MapPress Release ZenivexLabelSafety Data Sheet
completed updated
Date: 8/15/24

Location:
San José 		95116 and 95133Interactive MapPress Release ZenivexLabelSafety Data Sheet
completed updated
Date: 8/13/24

Location:
San José and Milpitas		95035, 95131 and 95132Interactive MapPress Release ZenivexLabelSafety Data Sheet
completed updated
Date: 8/6/24

Location:
San José 		95123 and 95136Interactive MapPress Release ZenivexLabelSafety Data Sheet
completed updated
Date: 8/1/24

Location:
San José and unincorporated Santa Clara County		95116, 95127, 95131, 95132, and 95133Interactive MapPress Release ZenivexLabelSafety Data Sheet
completed updated
Date: 7/29/24

Location:
San José and unincorporated Santa Clara County		95111, 95112, 95121, and 95122Interactive MapPress Release ZenivexLabelSafety Data Sheet
completed updated
Date: 7/24/24

Location:
San José and unincorporated Santa Clara County		95127 and 95140Interactive MapPress Release ZenivexLabelSafety Data Sheet

 

 

 

Additional information