| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cesspool | 135 | 
                                                                 
                                    
                                    81.8%
                                 
                                                             | 
                                                        
                    
| 2 | Sewage System | 12 | 
                                                                 
                                    
                                    7.3%
                                 
                                                             | 
                                                        
                    
| 3 | Other | 18 | 
                                                                 
                                    
                                    10.9%
                                 
                                                             |