This undergraduate directed work was developed using field and laboratory data that form part of a larger doctoral research project entitled “Hydrogeochemistry and Spatial Distribution of Coexisting Geogenic Arsenic, Boron, and Lithium in the Lithium-Rich Endorheic Coipasa Salt Basin, Bolivian Altiplano” (KTH–UMSA), conducted by Lizangela Sofía Huallpara Lliully. The Dataset presented in this work are not an independent Dataset. Ownership of the original data corresponds to the doctoral research project and its principal researcher (Huallpara L.). The Dataset must not be reused, modified, or published independently without the explicit written authorization of the doctoral researcher.This dataset represents the primary data collection for the doctoral research conducted by Huallpara, L. The Dataset have been deposited in an independent international repository and assigned a DOI under the authorship of Huallpara, L. This Dataset is licensed under CC BY-NC-ND 4.0. Any reuse for analysis, publication, or creation of derivative works requires explicit written permission from the data owner. The complete analysis and interpretation of these data will be published in a peer-reviewed scientific article currently in preparation.