| Value | Category | Cases | |
|---|---|---|---|
| 1 | Wastewater network | 403 |
20.7%
|
| 2 | Tight cesspit | 43 |
2.2%
|
| 3 | Porous cesspit | 94 |
4.8%
|
| 4 | Others, specify | 74 |
3.8%
|
| Sysmiss | 1336 |