| Value | Category | Cases | |
|---|---|---|---|
| 1 | Boil and filter | 237 |
12.1%
|
| 2 | Boil only | 561 |
28.6%
|
| 3 | Filter only | 19 |
1%
|
| 4 | Purifying chemicals | 273 |
13.9%
|
| 5 | Nothing is done | 870 |
44.4%
|
| 7 | Missing | 0 |
0%
|
| Sysmiss | 2 |