| 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) |