California faces a multitude of environmental health challenges, including poor air quality, pesticide use, risks from climate change, and environmental health disparities in both urban and rural communities throughout the state. In this application, Tracking California will build on its long history of delivering environmental health data and communications that impact public health and reduce health disparities. We intend to modernize our data infrastructure to most efficiently maintain and visualize Nationally Consistent Data and Measures; address gaps and limitations in existing data with input from stakeholders; ensure data quality across indicators; and continue to conduct routine analyses to identify and respond to local and state environmental health issues. As we focus on modernizing our data pipeline and technical portal, we will continue to enhance our existing data information systems. We will continue to engage with our Tracking Implementation Advisory, a diverse representation of California communities and environmental health organizations, to inform programmatic activities and public health actions. We will continue to be a state and national leader on emerging environmental health issues, including harmful algal blooms, climate-related health risks, and community engagement in environmental health research.