While the level of customer expectation for water service is becoming higher, water quality management in water distribution system is becoming more and more difficult despite the development of water treatment technologies. The causes are increased risk of water quality in water resource due to climate change and water pollution, and aged water network and inadequate O&M. So, the rate of drinking tap water directly is still only 5.4% in Korea.
In this study, a Smart Water City(SWC) Model was developed and applied to test-bed city of 4 hundred thousand people. SWC is an innovative water management solution for whole process of water supply from water treatment plant to tap by integrating water and ICT to solve water related issues in current and future such as healthy drinking water, water security, water energy nexus, water welfare, smart water use, etc. SWC is composed of various smart technologies such as integrated management system, called water-NET, optimal re-chlorination to equalize and minimize chlorine concentration while sustaining a disinfection ability, self-flushing using auto drain valve and water quality sensor, electronic board showing the current water quality to enhance a reliability of tap water from customer, etc. The customer’s satisfaction have been increased from 55.0% to 92.3% and civil complaints of water quality have been decreased from 4.5 cases/month to 1.4 cases/month through this test-bed study.