Buildings not connected to the public sewer system
 | Type of wastewater treatment unknown |
 | Other type of wastewater treatment |
 | Septic tank with overflow |
 | Wastewatertank without overflow |
 | No wastewater treatment |
 | Biological treatment plant |
| Type of wastewater treatment unknown |
| Other type of wastewater treatment |
| Septic tank with overflow |
| Wastewatertank without overflow |
| No wastewater treatment |
| Biological treatment plant |