| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Public network | 172 | 196 |
31.6%
|
| 2 | Tight Cesspit | 50 | 61 |
9.8%
|
| 3 | Porous Cesspit | 321 | 353 |
56.9%
|
| 4 | Others | 11 | 11 |
1.8%
|