| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | 1. Public network | 1381 | 384541 |
51.7%
|
| 2 | 1. Porous cesspit | 1076 | 310021 |
41.6%
|
| 3 | 2. Tight cesspit | 223 | 47271 |
6.3%
|
| 4 | 2. Others | 13 | 2673 |
0.4%
|