| Sampling location | Cd (µg/ml) | Fe (µg/ml) | Zn (µg/ml) | Pb (µg/ml) |
| Indata spring | 0.004 | ND | 0.232 | 0.000 |
| Kamira 1 | 0.001 | ND | 0.028 | 0.000 |
| Kiwera spring | 0.005 | ND | 0.024 | 0.000 |
| Indata River I.R | ND | ND | ND | 0.000 |
| Gasaro/Burere source | 0.004 | ND | 0.155 | 0.000 |
| Rembwe | 0.004 | 0.000 | 0.022 | 0.000 |
| Kasasa spring | 0.002 | ND | 0.009 | 0.000 |
| Kamira spring | 0.002 | 0.000 | 0.118 | 0.000 |
| Standards WHO [45] | 0.003 | 0.05 | 0.01 | 0.000 |