Parameter mg/I  Point 1 Point 2 Point 3 Water Mean ± SD Sediment Mean ± SD Water Mean ± SD Sediment Mean ± SD Water Mean ± SD Sediment Mean ± SD Fe 1.41 ± 0.03 3.11 ± 0.006 1.36 ± 0.002 2.38 ± 0.002 1.37 ± 0.002 2.31 ± 0.02 Cr 0.45 ± 0.001 0.68 ± 0.01 0.34 ± 0.001 0.89 ± 0.001 0.33 ± 0.001 0.85 ± 0.001 Ni 0.38 ± 0.002 1.19 ± 0.001 0.47 ± 0.001 0.91 ± 0.001 0.54 ± 0.001 1.16 ± 0.001 Pb 0.95 ± 0.002 1.18 ± 0.001 0.92 ± 0.001 1.15 ± 0.001 0.78 ± 0.002 1.77 ± 0.004 Cu 0.42 ± 0.001 0.73 ± 0.001 0.30 ± 0.001 0.86 ± 0.002 0.28 ± 0.001 1.20 ± 0.001 Cd 0.30 ± 0.001 0.52 ± 0.001 0.39 ± 0.002 0.67 ± 0.001 0.22 ± 0.001 0.64 ± 0.002 CO 0.11 ± 0.001 0.49 ± 0.001 0.13 ± 0.001 0.46 ± 0.002 0.12 ± 0.001 0.49 ± 0.001 Hg 0.10 ± 0.003 0.22 ± 0.003 0.12 ± 0.001 0.3 ± 0.002 0.11 ± 0.003 0.26 ± 0.001 Results are expressed as means ± SEM of six determinations; concentrations of the heavy metals is in (mg/g)

Table 2: Concentration of selected heavy metals in water and sediments from petroleum imparted river (Warri River) in the Niger Delta, Nigeria during the rainy season