The study on the linkage between pollution load and water quality index of the Cidurian river - a case study of Serang District segments

Abstract

The increasing population and activities carried out on the Cidurian River banks impact increasing pollutants that enter the river to decrease river water quality. This study aims to determine the effect of the river’s pollution load from domestic, agricultural, and livestock sectors on the Cidurian river water quality index. Calculation results show that the Cidurian River Water Quality Index ranges from -59 to -14, heavily polluted to moderately polluted with heavily polluted locations in Kopo District. Likewise, with the calculation of pollution load, the highest value of pollution load is in Kopo District, with the domestic sector’s ratio 56%, agriculture 16.54%, and livestock 27.46%, respectively. Based on these calculations, it can be concluded that the Cidurian River Water Quality Index in the Serang Regency segment is strongly influenced by pollution load from the domestic sector compared to the agricultural sector and livestock sector in all monitoring locations. Hence, it is necessary to construct and operate a domestic wastewater treatment plant in densely populated areas, especially in Kopo District, to reduce the domestic sector’s pollution load, which is expected to increase the Cidurian River Water Quality Index.