| Structures | MTE | Children | Adults | ||
| CDI (µg∙kg−1∙BW−1∙d−1) | HQ | CDI (µg∙kg−1∙BW−1∙d−1) | HQ | ||
| Wells | Hg | 0.09 | 0.90 | 0.05 | 0.48 |
| Pb | 0.17 | 0.50 | 0.09 | 0.03 | |
| Cd | 0.00 | 0.01 | 0.00 | 0.01 | |
| As | 0.03 | 0.11 | 0.02 | 0.08 | |
| Fe | 123.03 | 0.15 | 65.62 | 0.08 | |
| HI = ƩHQ | - | 1.22 | - | 0.65 | |
| Boreholes | Hg | 0.10 | 0.98 | 0.05 | 0.52 |
| Pb | 0.23 | 0.07 | 0.12 | 0.04 | |
| Cd | 0.01 | 0.01 | 0.00 | 0.01 | |
| As | 0.05 | 0.17 | 0.02 | 0.08 | |
| Fe | 135.73 | 0.17 | 72.39 | 0.10 | |
| HI = ƩHQ | - | 1.39 | - | 0.74 | |