Parameters | NE | Min | Max | Average | Standard deviation | Benin’s standard |
Lead | 30 | 0.006 | 0.49 | 0.21 | 0.12 | 1 |
Cadmium | 30 | 0.001 | 0.28 | 0.08 | 0.08 | 1 |
Zinc | 30 | 0.050 | 0.61 | 0.38 | 0.15 | 5 |
Iron | 30 | 8.32 | 23.88 | 13.89 | 4.53 | - |
Cupper* | 30 | 1.02 | 2.93 | 1.96 | 0.54 | 2.5 |
Manganese | 30 | 0.050 | 0.19 | 0.12 | 0.04 | - |
Chromium | 30 | 0.038 | 0.10 | 0.06 | 0.01 | 2.5 |
Nickel | 30 | 0.001 | 0.62 | 0.02 | 0.11 | 2.5 |
Cobalt | 30 | 0.002 | 0.53 | 0.07 | 0.10 | - |
CHV | 30 | 0.020 | 0.38 | 0.04 | 0.06 | 0.1 |