Contact Us:
(209) 982-4675 or

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

7759 S. Airport Way
Stockton, CA 95206-3918

Reserved for future use.

The District's mosquito-borne disease surveillance program tests samples of known mosquito species that have the ability to carry West Nile Virus. The samples tested are of 50 or less mosquitoes. As of the week of 10/29/23 mosquito-borne disease testing is complete. Disease surveillance will begin in the spring 2024.

Positive Mosquito Samples


Positive Dead Birds


Click here for human cases and positive equine information:

Mosquito populations are low in the cooler months of fall and winter. Continue to avoid mosquito bites and report any mosquito problems to the District.  See tips to prevent mosquito bites.  

Day Biting Mosquitoes

Day Biting Mosquitoes - Aedes Aegypti

The Asian tiger mosquito, Aedes albopictus and the yellow fever mosquito, Aedes aegypti, have become established in some areas of California. Aedes aegypti were found in west Stockton, CA during the summer of 2019. These species can develop in artificial containers in warmer areas.


Public Information Outreach

Watch Video

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