| Location | Cd | Cu | Ni | Pb | Zn |
| Ira-Ipaye | 9.94 × 10−3 ± 3.97 × 10−3 (10.95 × 10−3 ± 4.37 × 10−3) | 6 × 10−3 ± 1.4 × 10−3 (6.66 ×10−3 ± 1.53 × 10−3) | 2.11 × 10−3 ± 0.57 × 10−3 (2.32 × 10−3 ± 0.63 × 10−3) | 47.3 × 10−3 ± 21.3 × 10−3 (52.1 × 10−3 ± 23.5 × 10−3) | 341.8 × 10−3 ± 348.6 × 10−3 (376.3 × 10−3 ± 383.8 × 10−3) |
| Agboroko | - | 0.19 × 10−3 ± 0.38 × 10−3 (0.21 × 10−3 ± 0.42 × 10−3) | - | - | 5.43 × 10−3 ± 4.58 × 10−3 (5.98 × 10−3 ± 5.05 × 10−3) |
| Akesan | 7.06 × 10−3 ± 4.68 × 10−3 (7.77 × 10−3 ± 5.15 × 10−3) | 9.83 × 10−3 ± 3.46 × 10−3 (10.83 × 10−3 ± 3.81 × 10−3) | 1.83 × 10−3 ± 0.85 × 10−3 (2.02 × 10−3 ± 0.94 × 10−3) | 61.3 × 10−3 ± 39.3 × 10−3 (67.5 × 10−3 ± 43.3 × 10−3) | 54.9 × 10−3 ± 10.6 × 10−3 (60.4 × 10−3 ± 11.7 × 10−3) |