Perylene dominates the organic contaminant profile in the Berau delta, East Kalimantan, Indonesia

► The distributions of PCBs, PAHs, HCB, and 4,4′-DDE in the Berau delta were assessed. ► Results from passive water sampling and sediment sampling were mutually supportive. ► High concentrations of perylene, of assumed terrestrial origin, were observed. ► The profile of other PAHs was indicative of petrogenic sources. ► Concentrations of PCBs, HCB, and 4,4′-DDE were low.