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 0.12 ± 0.002 0.13 ± 0.001 0.12 ± 0.002 0.18 ± 0.002 0.11 ± 0.001 0.18 ± 0.002 Cr 0.11 ± 0.001 0.19 ± 0.001 0.13 ± 0.001 0.19 ± 0.003 0.11 ± 0.001 0.12 ± 0.001 Ni 0.06 ± 0.002 0.08 ± 0.001 0.04 ± 0.001 0.07 ± 0.003 0.02 ± 0.001 0.05 ± 0.001 Pb 0.10 ± 0.002 0.20 ± 0.001 0.17 ± 0.001 0.23 ± 0.001 0.18 ± 0.002 0.16 ± 0.003 Cu 0.01 ± 0.001 0.04 ± 0.001 0.01 ± 0.001 0.06 ± 0.001 0.02 ± 0.001 0.03 ± 0.001 Cd 0.04 ± 0.001 0.06 ± 0.001 0.02 ± 0.002 0.04 ± 0.001 0.01 ± 0.001 0.03 ± 0.002 Co 0.02 ± 0.001 0.03 ± 0.002 0.01 ± 0.002 0.05 ± 0.001 0.02 ± 0.001 0.05 ± 0.002 Hg 0.01 ± 0.001 0.05 ± 0.001 0.01 ± 0.001 0.01 ± 0.001 0.03 ± 0.001 0.02 ± 0.001 Results are expressed as means ± SEM of six determinations; concentrations of the heavy metals is in (mg/g)

Table 4: Concentration of selected heavy metals in water and sediments from non-petroleum imparted river (Ikpoba River) in the Niger Delta, Nigeria during the rainy season.