Contact Us:
district@sjmosquito.org
(209) 982-4675 or 1-800-300-4675

Office Hours:
Monday - Friday
7:00 a.m. to 3:30 p.m.

Address:
7759 S. Airport Way
Stockton, CA 95206-3918

The District's mosquito-borne disease surveillance program tests mosquito samples and dead birds for West Nile virus (WNV). The results below reflect cumulative positive detections in San Joaquin County for 2026 through the date listed below.

Last Updated: June 3, 2026

Positive Mosquito Samples
0 total for 2026

Positive Dead Birds
0 total for 2026

Click here for human cases and positive equine information: westnile.ca.gov

Mosquito populations increase as the weather gets warmer. Effective mosquito prevention starts at home. Perform weekly yard checks to remove all standing water around your property. Report significant mosquito problems to the District. See tips to prevent mosquito bites.

Day Biting Mosquitoes

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The yellow fever mosquito, Aedes aegypti, and Asian tiger mosquito, Aedes albopictus, have become established in some areas of California. Aedes aegypti were first found in Stockton, CA in 2019 and are now present in every San Joaquin County city. These species can develop in artificial containers holding as little as a tablespoon of water.

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Public Information Outreach

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Through public information and outreach, the District provides updated and timely information and educational material to inform the public. YouTube, Facebook, Instagram, Brochures and Publications, Be A Mosquito Detective, Take the Mosquito Quiz.

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