Ecology, Environment and Conservation Paper

WATER QUALITY STATUS OF CILIWUNG WATERSHED, INDONESIA, BASED ON POLLUTION INDEX AND STORET INDEX

Makna Fathana Sabilaa, Hefni Effendib and Yudi Setiawanc

Abstract

Ciliwung River is one of the sources of raw water and drinking water for Jakarta. Ciliwung watershed has an area of approximately 347 km2; and the length of the main river is 117 km. Ciliwung river flows through three major cities, Bogor at upstream, Depok at middle stream, and Jakarta at downstream. The water quality parameters for this study were TSS (Total Suspended Solids), Total Phosphate, BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), DO (Dissolved Oxygen). These parameters were calculated with Pollution Index Method and Storet Method and classified based on the GR No. 82/2001, Indonesia. The research is aimed to study the water quality status of Ciliwung Watershed. The Storet method showed that water quality status referred to class 2, the Ciliwung river status was highly polluted, while with Pollution Index Method, the river water quality status was moderately polluted. Based on the findings, it could be concluded that DO, BOD, COD, Total Phosphate and Total Coliform negatively impacted the water quality status of Ciliwung River.