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This work presents a water quality monitoring system using wireless sensor network (WSN) technology and powered by solar panel. To monitor water quality in different field sites and in real-time, a novel system architecture constituted by distributed sensor nodes and a base station is suggested. The nodes and base station are connected using WSN technology. Designed and implemented a prototype system using one node powered by solar cell and WSN technology. Data collected by various sensors in the node side such as pH, turbidity and oxygen density is sent via WSN to the base station. This novel system has advantages such as low carbon emission, low power consumption, more flexible to deploy and so on.