| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | sewer system | 172 |
0.2%
|
| 2 | closed drainage | 1079 |
1.3%
|
| 3 | open drainage | 972 |
1.2%
|
| 4 | sump | 1347 |
1.6%
|
| 5 | gully mouth | 131 |
0.2%
|
| 6 | pond/river | 42 |
0.1%
|
| 7 | unprotected hole | 2964 |
3.5%
|
| 8 | neighborhood | 42878 |
51.1%
|
| 9 | compound (yard) | 9414 |
11.2%
|
| 10 | street | 24694 |
29.4%
|
| 96 | other | 256 |
0.3%
|