The Analysis of Water Quality for Water Supply System in Bannongvang village, Namon District, Kalasin, Thailand

Abstract

In the past, surface water was used as a source of water supply in Bannongvang village, Namon district, Kalasin province, Thailand. It was known that the surface water had been polluted by domestic and agriculture activities causing the water quality unusable as water supply. Therefore, groundwater has been the only one source of water supply in the village since 2015. The study area covered an area of 160 km2 and lies in a semiarid region. There were about 800 people living in this area. Agriculture was the major activity in this area. The aim of this study was to analyze the water quality of groundwater supply for the village. In order to assess the water supply quality, water supply samples were collected from eight taps in different places around the village during September 2018. The water samples were analyzed for physical and chemical characteristics, such as pH, Total Dissolved Solids (TDS), as well as trace amount of metal concentration (Fe, Mn and Zn) in the laboratory using the standard methods given by the American Public Health Association (2005). The results were evaluated in accordance with the drinking water quality standards suggested by the World Health Organization and the Thai standard of water supply. The results showed the water supply quality of Bannongvang village and the need for the preliminary treatment of water before it was used for the household purpose.