| Value | Category | Cases | |
|---|---|---|---|
| 1 | Boil and filter | 130 |
4.4%
|
| 2 | Boil only | 1117 |
38%
|
| 3 | Filter only | 52 |
1.8%
|
| 4 | Nothing is done | 1556 |
53%
|
| 8 | Other (specify) | 81 |
2.8%
|
| Sysmiss | 6 |