Water level indicator is widely used in many industries and houses. People generally worry about the wastage of water, when they switch ON the motor and forget to OFF. An Water Level Indicator may be defined as a system by which we can get the information of any water reservoir .Water level indicator system are quite useful to reduce the wastage of water from any reservoir, while filling such reservoir. But for domestic purpose we cannot go for the instruments which use radar or ultrasonic principle that costs high. Water tank overflow is a common problem which leads to the wastage of water. In this project, the transistor based water level indicator circuit is used to indicate the water levels in a tank. Whenever tank gets filled, it gives alerts on particular levels. The LEDs is generally used for indicate the water levels, and also it stops when it reaches to high level in the tank automatically.