| Value | Category | Cases | |
|---|---|---|---|
| 1 | Pesticides and fertilizers | 98 |
19.8%
|
| 2 | Factories | 70 |
14.1%
|
| 3 | Waste dump sites | 42 |
8.5%
|
| 4 | Septic tanks and pit latrines | 104 |
21%
|
| 5 | Salt water | 98 |
19.8%
|
| 6 | Other, specify | 83 |
16.8%
|
| Sysmiss | 4287 |