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Vector Control District
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Vector Control’s Mission is to detect and minimize vector-borne diseases, to abate mosquitoes, and to assist the public in resolving problems with rodents, wildlife, and insects of medical significance.


What’s a vector?

A vector can be a mosquito, a rat, a flea, a tick, any animal or insect that can transmit disease or cause harm to humans.

What exactly is Vector Control?

The Santa Clara County Vector Control District is a County public health program that controls and monitors disease-carrying insects such as mosquitoes and ticks, and other harmful pests such as yellow jackets and rats. Primary services include:

  • Detection of the presence/prevalence of vector borne disease through planned tests, surveys, and sampling

  • Inspection and treatment of known mosquito and rodent sources

  • Response to customer initiated service requests for identification, advisory, and/or control measures for mosquitoes, rodents, wildlife, and miscellaneous invertebrates (ticks, yellow jackets, cockroaches, fleas, etc.)

  • Promotion of public awareness through outreach and educational services


Our programs and services are provided free of charge to all residents of the Santa Clara County.

  • Mosquito Inspection and Control

  • Free delivery of mosquito fish

  • Inspection & Advice for Rats and Mice

  • Insect Identification

  • Wildlife Advice and Inspection

  • Community Education

2015-10-22-WNV Fogging in Sunnyvale and Cupertino-Completed

Fogging operations to control WNV carrying mosquitoes from the 94087 and 95014 ZIP code areas of the cities of Sunnyvale and Cupertino were successfully completed in the early morning of 10/23.

A map of the treated area is available at

If virus is detected in the post-treatment mosquito samples, additional fogging may be required.  



2015-09-29-WNV Fogging in San José-Completed


Fogging operations to control WNV carrying mosquitoes collected from 95136 and 95123 ZIP code areas of the city of San José were successfully completed on 9/30 early morning.

A map of the treated area is available at