The following datasets related to regulated drinking water system facilities in California have been developed and are available for the purpose of the March 23, 2023, OEDP workshop. The main purpose of the workshop is to engage community members and researchers in understanding datasets maintained and shared by the California State Water Resources Control Board Drinking Water Program and explore possibilities for their use and enhancement. Input from this workshop could be used to inform recommendations OEDP makes to partnering organizations about how to collect, share, and structure their open datasets. Conversations could also support community organizations in using water datasets to inform programming, policy advocacy, or organizing.