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 1.28 ± 0.002 3.51 ± 0.001 1.56 ± 0.002 3.58 ± 0.002 1.47 ± 0.002 2.61 ± 0.02 Cr 0.57. ± 0.001 0.79 ± 0.01 0.44 ± 0.001 0.99 ± 0.003 0.33 ± 0.001 0.95 ± 0.001 Ni 0.48 ± 0.002 1.27 ± 0.001 0.49 ± 0.001 1.1 ± 0.003 0.68 ± 0.001 1.22 ± 0.001 Pb 0.99 ± 0.002 1.22 ± 0.001 0.72 ± 0.001 1.36 ± 0.001 0.82 ± 0.002 2.00 ± 0.003 Cu 0.55 ± 0.001 0.84 ± 0.001 0.30 ± 0.001 0.96 ± 0.001 0.37 ± 0.001 1.22 ± 0.001 Cd 0.50 ± 0.001 0.56 ± 0.001 0.49 ± 0.002 0.68 ± 0.001 0.52 ± 0.001 0.74 ± 0.002 Co 0.13 ± 0.001 0.62 ± 0.002 0.12 ± 0.002 0.64 ± 0.001 0.14 ± 0.001 0.59 ± 0.002 Hg 0.12 ± 0.001 0.26 ± 0.001 0.12 ± 0.001 0.32 ± 0.001 0.13 ± 0.001 0.34 ± 0.001 Results are expressed as means ± SEM of six determinations; concentrations of the heavy metals is in (mg/g)

Table 1: Concentration of selected heavy metals in water and sediments from petroleum imparted river (Warri River) in the Niger Delta, Nigeria during the dry season.