The Water Pipeline Leakage and Drainage Overflow Detection System is a smart sensor-based project designed to detect water leakage in pipelines and overflow in drainage systems in real time. It uses conductive sensing wires and relay modules to trigger an alarm when water leakage or blockage is detected. This system helps prevent water wastage, property damage, and road flooding while supporting smart city infrastructure and water conservation. It also serves as an excellent educational project for students to learn automation, sensor technology, and safety monitoring systems.