| Value | Category |
|---|---|
| -9 | don't know |
| 1 | water supply connected to public water pipeline |
| 2 | water supply connected to private air compressed water tank |
| 3 | private fountain connected to public water pipeline |
| 4 | public fountain connected to public water pipeline |
| 5 | public fountain connected on separate spring |
| 6 | excavated well (pump) |
| 7 | perforated (piped) pump |
| 8 | aerial well (pump) |
| 9 | regulated spring |
| 10 | unregulated spring |
| 11 | tank (water cistern) with percolator |
| 12 | tank (water cistern) without percolator |
| 13 | surface water (from river, stream, cave, ditch, etc) |
| 14 | bottled water |
| 19 | other (specify) |