| Value | Category |
|---|---|
| 1 | The water supply system installed in the apartment |
| 2 | The water system tap in the yard or in the vicinity |
| 3 | The well in the yard or in the vicinity |
| 4 | Natural spring in the yard or in the vicinity |
| 5 | river, lake, spring, channel |
| 6 | Bought water |
| 7 | Other |