| Value | Category | Cases | |
|---|---|---|---|
| 1 | Wastewater network | 466 |
16.7%
|
| 2 | Tight cesspit | 80 |
2.9%
|
| 3 | Porous cesspit | 131 |
4.7%
|
| 4 | Others, specify | 90 |
3.2%
|
| Sysmiss | 2017 |