As the center of the economy, culture, and politics of Indonesia, Jakarta has been facing a river contamination hazard for decades and worsened its riverbank. In this research paper, we comprehensively describe and examine complex river pollution through parameters such as state of the water quality, waste loading, and anthropogenic activities on the riverbanks. We utilized publicly open data sources from the Indonesian government and geospatially assessed each parameter in GIS platform using simplified hotspot analysis. Our classification results are validated through garbage amounts observed at Jakarta’s garbage filtering facilities. Qualitatively analyzed, we found that the downstream in the west, north, central, and east Jakarta’s heavily polluted rivers are influenced by the anthropogenic activities and the inadequate number of filtering facilities, while the upstream areas on the south are relatively less polluted. This finding not only reflects the importance of the government’s policy on Jakarta’s river waste management and its residence behaviors but also shows promising areas for the future location of garbage filtering facilities to reduce the burden of the downstream area. Key Words— Simplified Hotspot Analysis, River Water Quality, Waste Management, Riverside Anthropogenic Activities