This study explains water quality in terms of seven heavy metals in the Upstream Citarum River and analyses human health risk (non-carcinogenic risk) for adults and children. Water samples were collected from five sampling locations along the Upstream Citarum River, i.e. from Majalaya Sub-District to Dayeuhkolot Sub-District. The contents of heavy metals were analysed by the Atomic Absorption Spectrometer (AAS) variant 240 FS. The results of the analysis showed that the pollution index value, which was categorised as slightly polluted from the highest to the lowest value, was as follows: location 4 (4.220) > location 1 (3.764) > location 2 (3.219) > location 5 (2.967) > location 3 (2.800). Values of the hazard index ( HI) for adults and children were as follows: Pb > Cr > Cd > Zn > Ni > Co > Cu. Pb and Cr have HI values greater than 1. This indicates that these metals can have a negative impact on public health. The HI in the ingestion pathway was greater than that of the dermal pathway, and the HI value for children was greater than that for adults. Further research is needed regarding the health risks from groundwater around the area which is used directly by the community because river water and groundwater systems are interconnected through streambeds.

The use of organochlorine pesticides has been banned because of their persistent nature. In response to this ban, the agricultural sector replaces organochlorine pesticides with organophosphate pesticides that are more easily degraded but are generally more toxic. Cikeruh River is part of the Upper Citarum Watershed. This research was aimed to determine the effects of using organochlorine and organophosphate pesticides in the water and sediment of the Cikeruh River. The water and sediment samples were taken from ten points along the river and then analyzed using a gas chromatography method to determine the pesticide concentration. The results of organochlorine pesticides were not detected in all water samples, while in the sediment were found 4-point samples, namely lindane and endrine. Organophosphate pesticides detected in all water samples were diazinon, chlorpyrifos, malathion, fenitrothion, parathion, methidathion and profenofos. Meanwhile, organophosphate pesticides detected in sediment samples were diazinon, chlorpyrifos, malathion, fenitrothion, parathion, methidathion and profenofos. The highest organochlorine was found in the sediments (7.376 ppb), and the highest organophosphate was found in the water (223.61 ppb).