The IUCN Global Standard for Nature-based Solutions™ self-assessment tool is a recent framework for assessing the effectiveness of a potential NbS intervention against eight good practice principles, associated with 28 criteria. This report brings an overview of the NbS Global Standard assessment outcomes and process at the Minas-Rio operation, an iron ore mining facility site operated by Anglo American in Brazil. The objective of the assessment was to analyse the measures taken by Anglo American pertaining to the enhancement of water security, with specific emphasis on water quality and supply. This assessment aimed to gauge the alignment of those measures with the established criteria in the NbS Standard.