155 Mason Circle, Concord, CA 94520

District Office Hours: 8 a.m. to 4:30 p.m. Monday through Friday

The Contra Costa Mosquito & Vector Control District is dedicated to the health and welfare of the county's more than 1 million residents covering 716 square miles. In fact, we've been protecting public health since 1927 when residents formed the District.

The District provides services and programs to all Contra Costa County residents at no additional charge (we are funded by property and benefit assessment taxes) that are specific to:

Mosquitoes: Inspection and assistance.

Mosquitofish: Upon request. For backyard pools and ponds - inspection and assistance.

Rats and Mice: Inspection and advice.

Skunks: Inspection and advice.

Ground-Nesting Yellowjackets: Ground nest treatment (ground-nesting species only).

Bees: Identification and education.

Ticks: Identification: Resident must provide a sample (mail to the District or bring in-person) of the tick for proper identification.

Biting/Stinging Insect ID: The resident must provide a sample (mail or bring in-person) of the insect for proper identification.

Our trained and certified employees work daily to reduce the risk of diseases spread by insects and animals by controlling them in a responsible, environmentally conscious manner. It's all part of our Integrated Vector Management (IVM) program where we use the most efficient and effective state-of-the-art protocols and products. All products are registered with the Environmental Protection Agency.