Water scarcity is a growing global challenge, and water leaks in distribution networks continue to contribute

significantly to this problem. This paper presents an Internet of Things (IoT)-based leak detection system developed

for monitoring the water distribution network in Abha, Saudi Arabia. The system integrates water flow sensors, ESP32

microcontrollers, and smart valves to identify leaks and send alerts and notifications directly to the operator via the

Blynk application. The proposed solution was tested through simulations and controlled trials designed to replicate

the hydraulic conditions of the Abha region. The results demonstrated 100% leak detection accuracy, 100%

confirmation accuracy, and zero false alarms, along with significant improvements in network management efficiency.

These results confirm the system's robust performance under controlled conditions and clearly demonstrate its high

potential for scaling up to multiple cities across the Kingdom, supporting national sustainability goals and enhancing

infrastructure reliability.