Mosquitoes in Maricopa County

Mosquitoes have a serious impact on the health, comfort, and economic welfare of people. Some species transmit diseases to man and animals.

In Maricopa County, there is particular concern with mosquito-borne encephalitis (sleeping sickness). Large numbers of mosquitoes interfere with outdoor work and recreation, cause livestock to lose weight, and lower property values. There are two main types of mosquitoes in Maricopa County.