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