Traditional water tanks which is not able to monitor the water level in water tank and not able to control the water pump, thus wasting of water due to overflowing of water is very serious problem. This works aims to solve these issues and offer an effective, affordable solution. An IoT (Internet of Things) system that aids users in solving such issues is integrated with sensors and devices to monitoring the water levels. The accessible IoT technology is implemented through Arduino. The water tank's level of water is broken down into maximum, minimal, and nominal levels, each of which is indicated by a various colour. An HC-SR04 ultrasonic sensor is installed on the tank's top to monitor the water level, measure the distance between the point and the sensor, and transfer the information to the Android app via Arduino. The Android applications has two option on/off switch that is used to check water level and operate the same. The Android application offers a user interface with buttons for manual operation, a motor status LED, and a tank.