Water quality assessment for self-sufficient water resources for DKI Jakarta

DKI Jakarta, Indonesia (106.22'42" S and 106.58'18"E) is passed by the 13 major rivers. However, only Krukut River, in South Jakarta has contributed 5.7% for supply the 60,27% coverage service of the10.178 million populations (2015). This paper is preliminary research to find the potential water resources for self-sufficient water supply. This study used multivariate analyzed of Factor Analyzed (FA) and Cluster Analysis (CA) for the archive river water quality data set covers the period from 2010 to 2015 from the Environment Department of DKI Jakarta. They selected the main pollution parameter and the potential raw water resources which necessary to study severely. The FA identified the two groups of water quality variables, which explain majority of the experimental data, and resulted organic pollutant as main factor that influenced DKI Jakarta river water quality. Therefore, BOD and COD used as main parameter for water quality further assessment. CA grouped 43 sampling sites into four clusters. 5 sampling locations on 4 rivers need further study for additional raw water sources.