No longer Available: In-Person Mosquitofish Pick Up. Contra Costa county residents can request mosquitofish by clicking here.



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Frequently Asked Questions

Get all the answers to our most frequently asked questions.

Invasive Mosquito Species of California

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

In a Minute Videos

These videos highlight our efforts regarding inspection and control efforts of the insects and animals our District provides services for.