We conduct adult mosquito control treatments ('adulticiding') when public health is at risk - for example, when we detect West Nile virus in mosquitoes or to slow spread of invasive mosquitoes. Sign up online for email alerts or call 650-344-8592 to request to be added to the email notification list.

**Any scheduled treatment may be postponed, cancelled or rescheduled due to unfavorable weather conditions and/or other reasons**

Scheduled Adult Mosquito Control Treatments:

No adult mosquito control treatments are scheduled at this time.

 

Completed Adult Mosquito Control Treatments:

No treatments have been conducted this year.

 

Page last reviewed: September 16, 2026