In 1926, the people of Contra Costa County voted to create the Contra Costa Mosquito Abatement District (CCMAD), and in 1927, 95 years ago, we opened our doors and have been protecting public health in Contra Costa County ever since.
The District's original jurisdiction only included the waterfront from Martinez to Antioch. CCMAD focused primarily on reducing the risk of mosquitoes by using engineering methods such as digging ditch networks, dredging, building, and repairing levees.