Health and Wellbeing Survey Data
California Health Interview Survey (CHIS) is a source of information on health, health behaviors, and access to health care services. The survey is conducted every two years through telephone surveys of adults, adolescents, and children, and is the largest state health survey in the nation. In the following documents, information from CHIS is presented and used to estimate the number of residents represented by the survey data. Both County-level and Health and Human Services Agency (HHSA) Region-level information is provided.