The Sacramento-Yolo Mosquito and Vector Control District provides year-round mosquito and vector control services to Sacramento and Yolo Counties. The two counties combined comprise 2,013 square miles of urban, commercial and agricultural land. The District is divided into 26 geographical zones, with state-certified technicians responsible for all aspects of mosquito and vector control in each zone, from surveillance to treatment.

The mission statement of the District is "To provide safe, effective and economical mosquito and vector control for Sacramento and Yolo Counties". To accomplish this the District provides continual surveillance of mosquitoes and other vectors to ascertain the threat of disease transmission and annoyance levels and then uses safe integrated vector management methods to keep mosquitoes and other vectors below those levels. The District promotes cooperation and communication with property owners, residents, social and political groups and other governmental agencies to help in those efforts.

The citizens of Sacramento and Yolo Counties and their selected legislative and administrative representatives expect the District to employ the best qualified individuals, and that the tenure of every employee will be based upon demonstrated need for the work performed, availability of funds, faithful and effective performance, proper personal conduct and continued fitness for the position, and that each employee will be encouraged, trained and developed to assure optimum performance.