| Value | Category | Cases | |
|---|---|---|---|
| 1 | Public network | 1393 |
63.2%
|
| 2 | Porous Cesspit | 552 |
25%
|
| 3 | Tight Cesspit | 223 |
10.1%
|
| 4 | None | 36 |
1.6%
|