Current Virus Activity

Current West Nile virus activity in Contra Costa County.

Current Spraying Info | 2018 Virus Activity To Date | Receive Notifications

News and Current Events

Official announcements and articles highlighting important vector and vector-borne related news.

NEW: West Nile Virus Confirmed in Mosquitoes in Contra Costa County

Invasive Mosquito Species of California

While not currently in Contra Costa county, two invasive mosquito species that can transmit Zika, dengue, yellow fever, and chikungunya are in other parts of California.

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In a Minute Videos

These one-minute videos take you right to the action as we control the insects and animals capable of transmitting disease/causing harm.

NEW: Skunk Inspection Specifics

Frequently Asked Questions

Get all the answers to our most frequently asked questions.

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