This chapter reviewed and explained the importance of water quality monitoring and its technology from generation to the distribution. The authors are reporting a SCADA based intelligence sensing system which is utilising the Internet of Things to improve easy access to monitor water quality, treatment process and plant health in real time. Internet of Things, a new era of computing technology and a smart connect, machine to machine, machine to infrastructure, machine to environment an intelligent system which can talk each other, make operational functions in universal network in the cloud. Continuous surveillance of potable water quality during production and delivery, what is happening in a plant and information required to apply needs in the water distribution network requires huge connection infrastructure and its availability with time. IoT is the solution of these problems of platform. In North 24 parganas Arsenic area water supply scheme uses Internet of Things 1st time in India to access water quality information, plant information, and water supply information globally anywhere in the earth having the network of internet. This paper describes how IoT works in a water treatment process, production and distribution in a scalable way. This will be the convergence of consumer, business and industrial internet considering environmental impacts. This will be the way to get the information in your pocket. This chapter also describes how SCADA works with IoT to assist in the production of potable safe drinking water. The case study describes the functionalities of Supervisory Control and Data Acquisition System (SCADA) and Internet of Things (IoT) system installed which proves its sustainability for last 10 years. It helps to minimize the cost of production, smooth delivery and maximize water quality to help rural people from menace of various water contaminations like Arsenic threat. This chapter also described the features of future water monitoring through indigenously developed sensors.