| Value | Category | Cases | |
|---|---|---|---|
| 1 | Wastewater network | 144 |
33.4%
|
| 2 | Tight cesspit | 105 |
24.4%
|
| 3 | Porous cesspit | 155 |
36%
|
| 4 | Others | 0 |
0%
|
| Sysmiss | 27 |