| Value | Category | Cases | |
|---|---|---|---|
| ditch | 2 |
1.5%
|
|
| dk | 1 |
0.7%
|
|
| drain | 1 |
0.7%
|
|
| pit | 22 |
16.4%
|
|
| septic | 73 |
54.5%
|
|
| sewer | 35 |
26.1%
|