| Value | Category | Cases | |
|---|---|---|---|
| 1 | Local authority dumping site | 405 |
77.9%
|
| 2 | Private dumping site | 71 |
13.7%
|
| 3 | Randomly | 13 |
2.5%
|
| 4 | Others | 24 |
4.6%
|
| Sysmiss | 7 |