| Value | 
                    Category | 
                                                                            
                                    
                    
                        | Alum | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | N/A | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | None | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | Nothing, the water is clean | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | nothing | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | the water is not drinkable | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | they buy drinking water | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | they just drink it | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.