Adult Mosquito Control Information
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The Vector Control Program (VCP) monitors mosquito-related public health risks throughout the County. If an elevated public health risk exists that cannot be reduced by other means, such as eliminating mosquito breeding or preventing larval growth, then the VCP may use adult mosquito control treatments to reduce the number of infected adult mosquitoes.
Depending on the situation, these adulticides may be applied with hand-held, backpack, portable, and/or truck mounted equipment by skilled vector control technicians certified by the California Department of Public Health. Larvicides may also be used in situations where mosquito breeding is detected. Every attempt will be made to contact residents in affected areas at least 24 hours prior to treatment.
Our team regularly traps mosquitoes and tests them for diseases like West Nile virus, dengue, and Zika. If our analysis of this information shows that there is an elevated risk to public health in a certain area, we will consider using adult mosquito control products.
This decision making process is described in our Mosquito-borne Virus Strategic Response Plan which is based on State guidelines and peer reviewed research.
The Vector Control Program uses an integrated vector managment approach. Adult mosquito treatments are always accompanied by efforts to find and control sources of mosquito breeding in the neighborhood and to educate the public about mosquito prevention. You can learn more about how the Vector Control Program controls young mosquitoes in standing water here.
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