Receptor | Potential contamination risk factors | Hand dug wells with risk factor | Contamination/ Risk factor (%) | Risks by hand dug wells (%) |
Hand dug wells | Latrine or septic tank soak-away within 10 m of the wells | 9 | 8.57 | 86.6 |
Fencing around the well inadequate to keep animals away | 15 | 14.4 | 100 | |
Absence of apron wall less than 1 m and/or lack of top protection covering | 9 | 8.65 | 60 | |
Poor depth and lack of internal lining | 8 | 7.63 | 53.3 | |
Abandoned materials inside the wells | 12 | 11.53 | 80 | |
Poor drainage around the wells that can allow water to stand | 8 | 7.63 | 53.3 | |
Uncapped wells | 13 | 12.5 | 86.6 | |
Farming activities near the wells | 3 | 2.88 | 20 | |
Presence of trees near the well. | 9 | 8.65 | 60 | |
Animals, birds and excreta seen near the well | 11 | 10.57 |
| |
Other nearby sources of contamination such as wastewater dumps within 10 m | 7 | 6.73 | 20 | |
|
| 104 | 99.74 |
|