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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

Latest News & Updates


2016-02-10- Helicopter Treatment to Reduce Emergence of Adult Winter Salt Marsh Mosquitoes


Weather permitting, the Santa Clara County Vector Control District will apply a biological control agent and insect growth regulator by helicopter on Wednesday, February 10, 2016, to reduce the emergence of adult mosquitoes. The treatment is scheduled to start at approximately at 7:30 a.m. in the Palo Alto marsh areas and may continue in the afternoon. If needed, the operation may be extended to the morning of Thursday, February 11.

A map of the area can be found at

Products Used by SCCVCD for
Larvicide Treatment
Altosid SR-20 Altosid SR-20 MSDS.Downloaded 2013.02.pdf Altosid MSDS

VectoBac 12 AS

VectoBac 12 AS Label.Downloaded 2013.02.pdf VectoBacLabel VectoBac 12 AS MSDS.Downloaded 2013.02.pdf VectoBac MSDS

It’s Tick Season!

Adult Western blacklegged ticks (Ixodes pacificus), transmit Lyme and other diseases in California and are more likely to be encountered from late October to March.

If you are going outdoors to a tick area:

  • Avoid the edges of trails, grassy areas and brush.

  • Wear long pants and long-sleeved shirts, which makes it harder for ticks to get beneath clothing.

  • Apply DEET-based repellents on skin, or Permethrin-based repellents on clothing.

  • When back home, take a shower and inspect yourself, family, and pets for unnoticed ticks.

  • We provide free tick identification Monday-Friday from 8:00 a.m. to 4:30 p.m. except holidays.

  • If you feel sick within 30 days after being bitten by a tick, consult your doctor.

Check this CDC website for more information on ticks and the diseases they transmit.