The WRRC is pleased to release the second in its Arizona Water Factsheet series, the Pima County Water Factsheet. These county-level resources are designed to answer common questions about water resources, tailored to every county in Arizona so as to foster understanding of the local nature of Arizona water resource challenges and solutions. Packaging concise water information for a general audience, these resources are nested within the broader Arizona context and address basic water supply and demand, regionally relevant challenges, and sustainability issues for the future. The WRRC draws upon a wide range of existing water-related data, guided by the expertise of a local Technical Advisory Committee (TAC), including, but not limited to, County Cooperative Extension staff. The Pima County TAC was highly engaged and, based on their input, the WRRC produced an extended six-page edition of the Pima County factsheet in addition to the standard four-page version. Factsheets are complete for Maricopa and Pima Counties, and the WRRC is in the final stages of revisions for Cochise County. Additional factsheets are well underway for Graham and Greenlee Counties, followed by Mohave and Pinal Counties. Central to this work is acknowledging the distinct water resources situations, priorities, and values of each county, as defined by local stakeholders.