The groundwater quality assessment for domestic use in Malaysia: A case study of Sabah rural area.

In rural areas of Sabah, Malaysia, the groundwater source is the only water supply for domestic consumption. Therefore, the monitoring of groundwater quality is essential to adhere to the standards by Malaysia's Department of Environment. This article seeks to evaluate the groundwater quality through the quantitative analysis, and the sampling carried out between January and March 2019. Among national water quality standards sampled including dissolved oxygen, pH, ammonia nitrogen, and total suspended solids. The result showed that the chemical oxygen demand was above the standards, >197mg/l (Station 5) and fall into Class V. However, the index of water quality for all stations indicate Class II with the lowest in Station 5 (80 per cent) and the highest in Station 6 (90 per cent). All stations showed clean category except for Station 5 (moderately polluted). This study also implicates that the water quality assessment could act as a tool in monitoring the groundwater. [ABSTRACT FROM AUTHOR]