From the last few years water pollution has become an increasing problem across the world. Water is a one of the primary resource for all living organism. The objective of this system is to provide real-time monitoring of the water quality. For this we use some physical and chemical parameters like pH, turbidity, salinity and temperature etc., to find the quality of water. To collect values from these parameters an IoT model is used. Then these values are sent into the cloud. To avoid the alteration of these collected data in cloud, Blockchain technology is used. Using internet the CPCB water department can access these data through an application developed.