Table 1: Contents of macro and trace elements in the studied samples.
| Locations Cd Cu Pb Zn Ni Mn Fe | Cd | Cu | Pb | Zn | Ni | Mn | Fe |
|---|---|---|---|---|---|---|---|
| Odo Owa 2 | 2 | 4.8 | 2.8 | 2.1 | 18.3 | 6.1 | 33.8 |
| Odo Owa 5 | 2 | 3.7 | 1.6 | 3.8 | 15.4 | 8.7 | 29.7 |
| Oke-Asa 1 | 1.8 | 2.8 | 1.8 | 3 | 18.9 | 4.8 | 40.6 |
| Ijero/Ipoti | 2 | 4.2 | 1.9 | 3.3 | 14.3 | 5.1 | 44.9 |
| Ipoti 3 | 2.3 | 4.1 | 3 | 3 | 14.6 | 5.5 | 52.4 |
| Soso | 1.9 | 4.5 | 2.2 | 2.8 | 16.4 | 5.2 | 48 |
| Lawrence 1 | 2.3 | 3.8 | 2.1 | 2.6 | 13.5 | 4 | 55.1 |
| Lawrence 2 | 2.2 | 3.2 | 2.1 | 2.8 | 14.7 | 4.5 | 29.9 |
| Erigbe | 2.8 | 3 | 2 | 2.2 | 13 | 5.2 | 60 |
| Arapate | 2.4 | 3.2 | 2 | 2.3 | 12.3 | 5 | 46.1 |
| Mean | 2.2 | 3.7 | 2.2 | 2.8 | 15.1 | 5.4 | 44.1 |
| St dev. | 0.29 | 0.67 | 0.43 | 0.52 | 2.17 | 1.28 | 10.49 |