The Nyiur and Enok Rivers marged and from a single river mounth in the Tanjung Pasir Villlage. The river mouth area is inhabited by clam (Anadara granosa). Around the river mouth, however, many industrial and shipping activities may produce Pb and Zn pollutant that enter the water, accumulated in the sediment as well as in the flesh of benthic organisms such as clam. To understand these of Pb a…