In this paper, the design and realisation of an integrated online water quality monitoring system has been described. The system has been applied to monitoring the DO and pH parameters in several shrimp aquaculture centers in Indonesia, i.e. Banyuwangi, Lampung, and Bali. Using an automatic aeration system, the DO value has been maintained above 5 mg/l. On the other hand, data collected from the sensor measurements at each aquaculture can be accessed by sms gateway or transmitted to the master station using telemetric system for further analysis or study.The system has been operational in improving the water quality management and reducing the operational cost of the shrimp aquaculture. The integrated system is currently being developed to include new station from other location, as well as improved for better data transmission from the exhisting stations.