Environmental health Investigations branch

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California Breathing

Asthma Data

California Breathing analyzes asthma data from a variety of sources to better understand the burden of asthma in California. These data are summarized and made publicly available through an interactive data dashboard, infographics, and downloadable data sets. California Breathing aims to make asthma data accessible and informative to the public and partners working to reduce asthma in California. California Breathing makes asthma data accessible and informative to the public and  its partners working to reduce the burden of asthma in California.

Asthma Infographics

Plain language infographics that provide a snapshot of asthma data in California

Tracking California’s Data Explorer Tool

Asthma Data in Tracking California’s Data Explorer Tool – Due to shrinking federal funds, California Breathing will no longer host the California Asthma Dashboard. California Breathing is partnering with Tracking California, a program of the Public Health Institute that mobilizes data to identify and understand pollution and disease, to provide asthma data through an interactive online data tool called the Data Explorer Tool. The Data Explorer Tool provides the following county and zip code-level asthma measures:

Asthma prevalence
Asthma emergency department visits, hospitalizations, and insurers
Asthma deaths

California Health and Human Services Open Data Portal

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Asthma data sets are available for download from the California Health and Human Services (CHHS) Open Data Portal. Download state- and county-level data on:

California Asthma Control Strategies Webinar Series

During the Fall of 2021, California Breathing hosted a three-part webinar series about asthma control strategies in California.

Webinar 1: The Burden of Asthma in California |
presentation slides (PDF) – Using statewide asthma surveillance data, CB described the burden of asthma data and how certain populations are disproportionately affected by asthma.
Webinar 2: Asthma Management Academy Evaluation | presentation slides (PDF) - CB shared evaluation results from the past four years, including the positive impact the Asthma Management Academy has had on CHWs' knowledge, skills, and asthma services, as well as on patient health outcomes.
Webinar 3: Asthma Control Strategies Assessment and Recommendations | presentation slides (PDF) - In February 2020, CB assessed which asthma control strategies are implemented across California. In this webinar, CB shared assessment results, identified gaps in services, and shared evidence-based recommendations to improve asthma control.

Additional Data Resources

Additional asthma information is available from these sources:

CalEnviroScreen (emergency department visits by census tract)
AskCHIS (prevalence, work and school days missed, use of daily controller medication, and development of asthma action plan by county)
AskCHIS Neighborhood Edition (prevalence by zip code and other small geographic areas)

Custom Data Request

If you are seeking asthma data that are not available from any of the resources list above, please send your request to California.Breathing@cdph.ca.gov and we will contact you regarding the possibility of creating a customized data set. It is not always possible to fulfill custom requests, but each request will be considered.

CDPH Links