Objective: The objective of this work is to evaluate whether, in the Piracicaba, Capivari, and Jundiaí (PCJ) River Basins, their managers can dimension, integrate, or foresee the right to water and sanitation for populations, which, due to their condition of social, economic, or geographic distribution are in a situation of territorial vulnerability. Methodology: The methodological path adopted consisted of a bibliographical literature review and a punctual analysis of the Situation Report of Water Resources in the PCJ Basins 2021, base year 2020. Originality/Relevance: The most significant academic contribution is the proposition of theoretical mechanisms that support the scope of the universality of supply services and the difficulties faced in the territory for access to this common and finite good, water. The relevance and originality of the study consist in showing, in its methodology and results, how territorial vulnerability is among the main strategic challenges of the sustainable management of water resources. Results: The main result achieved in the study indicates that in most of the urban regions of the municipalities analyzed, public service for water supply is widespread. However, access is not of good quality and universal. Social/management contributions: The authors' main expectation is to be able to contribute to the advancement of discussions on the issue of universal access to water and sanitation and to provide, within the scope of public policies, analytical paths for the sustainable management of water resources. [ABSTRACT FROM AUTHOR]