data californiaTracking California is a program of the Public Health Institute, in partnership with the California Department of Public Health and the Centers for Disease Control's (CDC) National Environmental Public Health Tracking Program. ... We are aWelcome to the Statewide Database, California's redistricting database. We are responsible for collecting and processing data for California's decennial redistricting. In 2001, 2011 and 2021, these data were used for Assembly,