What can Californians’ experiences tell us about the state’s health in 2025? Whether examining the effects of the 2025 wildfires on mental and physical health and access to air conditioning during extreme heat, barriers to healthcare access, food insecurity, immigrant health, or fentanyl use, the latest California Health Interview Survey (CHIS) data reveal the challenges, disparities, and trends shaping health across California.

Join us on Thursday, October 15, as UCLA Center for Health Policy Research (CHPR) Director and CHIS Principal Investigator Ninez Ponce and CHIS Director Todd Hughes unveil the 2025 CHIS data and highlight key findings from the survey. CHIS Senior Data Analyst Alex Bates will also share a fact sheet featuring a series of new questions on vaping among young adults.

For the past 25 years, the UCLA Center for Health Policy Research’s California Health Interview Survey has produced credible and comprehensive data on the health and health care needs of California’s large and diverse population, and we remain committed to putting data into the hands of all people through accessible online tools, publications, and trainings.

The 2025 CHIS data will be available via our free and easy-to-use online health query tool, AskCHIS™, which features 703 total topics and variables for 2025, and more than 32 million different estimates.

Among the 173 new topics and questions in the 2025 CHIS are: updated race and ethnicity measures reflecting 2024 revisions to federal SPD-15 guidelines, including disaggregated data on Middle Eastern and North African communities; young adult vaping; air conditioning access during extreme heat waves; experiences with drought and water shortage; use of fentanyl and prescription stimulants; soda consumption among children and adolescents; and more.

Each year, CHIS interviews more than 20,000 California households — including adults, adolescents, and children — on a wide range of health matters and topics that influence health, including: access to and use of healthcare, health insurance, health conditions (e.g. asthma, diabetes), health behaviors (e.g. smoking, alcohol use, diet), mental health, oral health, food insecurity, adverse childhood experiences, hate incidents, climate change, child care, caregiving, housing, public program participation, and much more.

Data can be viewed by counties and regions across the state, as well as sociodemographic factors such as race, ethnicity, age, gender, sexual orientation, gender identity, income level, immigration status, veteran status, language, household type, and more. View the full list on the CHIS Questionnaires and Survey Topics webpage.

CHIS gives policymakers, advocates, health departments, healthcare providers, community organizations, researchers, journalists, and other stakeholders the evidence and information they need to assess different aspects of health, identify gaps and needs, and then fight for policies that can improve the lives of Californians through better health and healthcare.