Residents of Tracy and the surrounding area can pick up free mosquitofish from the San Joaquin County Mosquito & Vector Control District.

Mosquitofish eat mosquito larvae, including the species that carry West Nile virus, and can be placed in animal drinking troughs, ornamental ponds and neglected swimming pools. 

COVID-19 protocols will be observed, and people are asked to wear masks and practice social distancing.

Mosquitofish can also be delivered; call the San Joaquin County Mosquito & Vector Control District office at 209-982-4675.

Learn more:

• The Centers for Disease Control developed a comprehensive resource page on West Nile virus, including details about prevention, symptoms, statistics and maps.

• In March, the state of California produced a chart of West Nile virus infections and deaths since 2003 (PDF).

• More information, including current West Nile virus activity, is available on the state’s “Fight the Bite!” page,


  • Occurred Friday, June 26th, 2020 @ 11:00 am – 1:00 pm


Tracy Community Center

950 East St.
Tracy, CA 95376


San Joaquin County Mosquito and Vector Control District

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