| Receptor | Potential contamination risk factors in dry and rainy seasons | Boreholes with risk factor | Contamination/ risk factor (%) | Risks by boreholes (%) |
| Boreholes | Unsanitary/worn-out seal of borehole pumps | 10 | 9 | 47. |
| Nearest latrine or a pit latrine that percolates to soil | 12 | 10.8 | 57.1 | |
| Trees around boreholes that lead to contamination | 10 | 9 | 47.1 | |
| Environmental sources of pollution (e.g. rubbish and surface water discharge) within 10 m radius | 8 | 7.2 | 38.09 | |
| No fence around boreholes | 13 | 11.7 | 61.9 | |
| Riverbed near boreholes | 4 | 3.6 | 19.04 | |
| Lack of local management committee | 9 | 8.1 | 42.85 | |
| Pumps manipulated with feet | 4 | 3.6 | 19.04 | |
| Uncapped well within 15 - 20 m of the boreholes | 8 | 7.2 | 38.09 | |
| Poor drainage near the water point | 9 | 8.1 | 42.86 | |
| Animal and bird excreta | 21 | 18.9 | 100 | |
| Other nearby sources of contamination such as wastewater dumps trees, within 10 m | 3 | 1.8 | 14.28 | |
|
|
| 111 | 99 |
|