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General Contact Number: (530) 621-5567

Vector Control

Welcome to Environmental Management
Vector Control District

 El Dorado County's Vector Control District was formed in 1963 in response to citizen complaints regarding an abundance of pest mosquitoes. The opportunity to establish a mosquito abatement district was passed over in favor of a county service area which would be governed by the County Board of Supervisors. In 1980 the District was upgraded to a Vector Control District. The District belongs to the Mosquito and Vector Control Association of California (MVCAC) and interacts regionally and nationally with other public agencies. The District's service area encompasses 195 square miles from the crest of the Sierra Nevada mountain range near Echo Summit to the shore of Lake Tahoe in both the City of South Lake Tahoe and the unincorporated area of El Dorado County. Our mission is to provide quality Vector Control services and protect the public health and safety with minimal impact to the environment.

​Mosquito Treatment

​Hantivirus Trapping

​Hantivirus Testing

​Just another busy day in the field

​Treehole Mosquito

​Inside a Yellow Jacket Nest

​Honey Bee Swarm

​Suited up and all ready to spray for plague

​Plague Dusting Activity

Mosquito Control Program

The Mosquito Control Program in Tahoe (East Slope) and on the West Slope have been designated as seasonal programs with mosquito control services provided during the mosquito season, usually from late Spring into the Fall season. The Tahoe program also provides services for yellowjacket control. For services in El Dorado County, West Slope (Placerville area) call (530) 621-5300. Mosquito fish can be provides free of charge. Please report any abandoned swimming pools or possible mosquito breeding sources to our offices. For services in the Tahoe Basin call (530) 573-3197. Mosquito fish are not used in the Tahoe Basin. 


How Best to Avoid West Nile Virus .... Follow the Four (4) D's

  • Drain the water. Eliminate all sources of standing water that can support mosquito breeding.

  • Avoid going out during dusk and dawn. Mosquitoes are active during these times. They are especially active for two hours after sunset.

  • Dress appropriately. Wear long sleeves and long pants. Also make sure that doors and windows have tight fitting screens. Repair or replace screens that have tears or holes.

  • Wear a good repellant that has DEET in it. Apply according to directions.

Mosquitoes and ticks can be found throughout California, and these insects bite! You can help prevent insect bites and the spread of diseases carried by mosquitoes and ticks by using insect repellent. Click here or on the logo above to learn more!

​West Nile Virus

The West Nile Virus hotline will continue to take reports of dead birds and squirrels State of California Hotline 1-877-968-2473 (1-877- WNV-BIRD). You can also make a report of a dead bird online at:  For more information on West Nile Virus prevention, please go to

Contact Us

Environmental Management Department
Vector Control Program


Placerville Office

2850 Fairlane Court, Building C
Placerville, CA 95667

(530) 621-5300

(530) 626-7130 Fax


South Lake Tahoe Office Address

924 B Emerald Bay Rd.
South Lake Tahoe, CA 96150
(530) 573-3450
(530) 542-3364 Fax


Local phone numbers for El Dorado Hills (916) 358-3555 x 5300