Access to safe and reliable water sources is a critical challenge faced by many urban areas, including Wukari Metropolis, Nigeria, where residents encounter significant difficulties obtaining clean water. Water vending is an ancient practice globally, especially in developing countries like Nigeria, where vendors deliver water by hand, donkey carts, pushcarts, or tank trucks. People patronize these informal water supplies despite lacking safety and quality assurance. Residents struggle with limited access to safe water sources and lack efficient water vendors. As such, this study addresses these pressing issues by proposing a web-based water supply management system designed to enhance accessibility and efficiency. The proposed system will allow users to conveniently order water through their smartphones, featuring functionalities such as user registration, order placement, order tracking, and flexible payment options. Utilizing an object-oriented design methodology, specifically the Unified Modelling Language (UML), the system development was guided by best practices in software engineering. This innovative solution addresses the limitations of the existing water supply system, providing a more convenient and effective means for residents to access clean water in Wukari metropolis.