| Value | Category |
|---|---|
| 1 | proper sewerage |
| 2 | into street |
| 3 | into drainage ditch near dwelling |
| 4 | into drainage ditch far from dwelling |
| 5 | into open space near dwelling |
| 6 | into open space far from dwelling |
| 7 | into river/stream near to dwelling |
| 8 | into river/stream far from dwelling |
| 96 | other |