Wide Area Larvicide Spraying

We are conducting a series of Wide Area Larvicide Spray (WALS) treatments to eradicate the aggressive Aedes aegypti mosquito, before it can establish a permanent population in our county.

The treatments are taking place in a neighborhood in East San José surrounding Machado Lane.  We have not been able to eliminate the mosquitoes using our first level of response, which includes applying larvicide to potential sources of mosquito habitat on private properties, with assistance from residents.

Wide Area Larvicide Spray treatments are necessary to protect public health from an invasive species that is capable of spreading the viruses that cause Zika, dengue fever, yellow fever and chikungunya. If Aedes aegypti gains a foothold in Santa Clara County, it would negatively affect our quality of life. These treatments allow us to target hard-to-reach sources of stagnant water that we have not been able to access.

Below is the list of scheduled treatments. For a list of frequently asked questions or a copy of our press release, please see the links at the bottom of this page.