| Value | Category |
|---|---|
| 1 | private tap water |
| 2 | public tap water |
| 3 | water bought from other place |
| 4 | pumped water from drilled well |
| 5 | well water |
| 6 | filtered spring water |
| 7 | unfiltered spring water |
| 8 | shallow well water |
| 9 | rain water |
| 10 | river, lake, pond water |
| 11 | other |