Analysis of the Long-Term (2005-2022) Water Qualities from the Water Production Plant in Seoul, Korea

The safe and sustainable water supply is the one of the key aspects for human life and activity. Due to the extreme water variations such as drought and flooding by the climate change and increased water demand by the increased population and industry, the water scarcity became more severe globally. Therefore, it was required to understand the variations of the water qualities before and after the water production by using the long-term collected data. In this study, the measured and collected water quality data during 2005~2022 from the Seoul city, Korea for the feed water (Han river), produced water in water treatment plant (WTP), produced water at the end-point, and stored water at the end-point were investigated. The concentrations of boron and bromine in Han river were frequently and increasingly observed, respectively. In case of the disinfection byproducts (DBPs), the trihalomethanes (THMs) were increased while other species of the DBPs such as haloacetic acid (HAAs), haloacetonitriles (HANs), and haloaldehydes were decreased. The bromine included DBPs ratios also increased with time. All the water quality satisfied the water quality standard in Korea during 2005-2022.