| Value | Category |
|---|---|
| 1 | Central water supply in dwelling unit |
| 2 | Central water supply in the building but not in dwelling unit |
| 3 | Central water supply in the yard |
| 4 | Carries or buys water |
| 5 | Own water collection system |
| 6 | River or spring |
| 7 | Well |
| 8 | Other |
| 9 | Unknown |