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With the increasing pressure on freshwater resources in arid and semi-arid regions, the reuse of non-conventional water sources has become a vital necessity to ensure water sustainability. Greywater, which is generated from domestic activities such as washing and bathing, represents a promising alternative water resource; however, its direct reuse is limited due to its physical and chemical characteristics. Consequently, there is a growing need for low-cost, environmentally friendly treatment methods that can improve greywater quality and enable its safe reuse. This study aims to investigate the effectiveness of powdered Moringa oleifera leaves as a natural treatment agent for improving the quality of greywater. The research focuses on assessing changes in key physicochemical parameters, including turbidity, pH, salinity, and dissolved oxygen, and evaluating the potential of Moringa as a sustainable alternative to conventional chemical treatment methods. 1. Do Moringa Aloe vera leaves have a measurable impact on the physicochemical properties of greywater? 2. Can Moringa Aloe vera leaves be utilized as a sustainable natural water purification agent? To answer these research questions, the study was conducted in two main stages. The first stage involved reviewing relevant scientific literature and identifying appropriate water-quality assessment protocols in accordance with the GLOBE Program. Greywater samples were collected from a single source, and baseline measurements of turbidity, pH, salinity, and dissolved oxygen were recorded. The second stage consisted of an experimental application in which powdered Moringa leaves were added to the greywater samples. The same water-quality parameters were measured after treatment, and the results were compared with the pre-treatment values to evaluate the effectiveness of the natural treatment process. The results demonstrated that the addition of powdered Moringa leaves significantly improved greywater quality by reducing turbidity, adjusting pH toward neutral levels, decreasing salinity, and increasing dissolved oxygen concentration. These findings indicate that Moringa oleifera represents an effective, sustainable, and eco-friendly solution for greywater treatment, particularly in water-scarce regions, and supports its potential application in sustainable water-resource management and reuse practices.