| Value | Category | Cases | |
|---|---|---|---|
| 1 | . Public network | 1373 |
48.5%
|
| 2 | Porous cesspit | 1399 |
49.4%
|
| 3 | Tight cesspit | 40 |
1.4%
|
| 4 | other | 21 |
0.7%
|