Table 4: Knowledge of the measures to treat drinking water.
| Before | After | Total 
 | ||||
| Suitable | Inadequate | |||||
| No. | % | No. | % 
 | No. | % | |
| Suitable | 12 | 30 | - | - | 12 | 30 | 
| Inadequate | 28 | 70 | - | - | 28 | 70 | 
| Total | 40 | 100 | - | - | 40 | 100 | 
p < 0.05 Source: Sociodemographic survey.