These include lead, cadmium, mercury, pesticides, and the carcinogenic polychlorinated biphenols (PCBs) and polycyclic aromatic hydrocarbons (PAHs).
Polutan tersebut mencakup timbal, kadmium, merkuri, pestisida, serta zat - zat karsinogen bifenol yang mengandung poliklorin (PCB) dan hidrokarbon aromatik polisiklik (PAH).