This research is part of main project ASEAN-Norwegian cooperation project on local capacity building for reducing plastic pollution in the ASEAN region is a project led by the Norwegian Institute for Water Research (NIVA) and financed by the Norwegian Development Assistance Program Against Marine Litter and Microplastics. Environmental Research center IPB University (PPLH-LPPM IPB) with Dr. Sigid Hariyadi from Aquatic Resources Management take part of this research. This research was conducted April to December 2021 in Citarum River (Upstream, Midstream, Downstream).

The aims of this research is to quantify the amount of plastic litter transported in the upstream, midstream and downstream of Citarum River within seasonal variations (wet and dry season) at different times of day, namely, morning, noon, and afternoon

Type of plastics that commonly found in high number of item are plastic bags, clear plastic bags, and plastic packaging. The highest volume of plastic debris was found in the upstream part of Citarum River compared to midstream and downstream. The existing reservoirs act as a trap for plastic debris and all riverine debris of Citarum River