The Water Tank Management System utilizes an Arduino Uno, ultrasonic distance sensor, and GSM module to monitor water levels and send alerts via WhatsApp. The ultrasonic sensor measures the distance to the water's surface, allowing precise level tracking. If the water level falls below predefined thresholds, the system triggers alerts. It communicates through a GSM module using AT commands, ensuring seamless WhatsApp message delivery. Users can customize alert levels and the recipient's phone number. For added functionality, the system can integrate a motor driver to remotely control pumps or valves. This project empowers users to remotely manage water resources, providing a versatile solution for various applications. It combines hardware, software, and communication technologies, offering a valuable hands-on learning experience in automation and IoT systems.