| Value | Category | Cases | |
|---|---|---|---|
| bottled water | 10 |
2.1%
|
|
| chlronation | 5 |
1.1%
|
|
| cleaning the storage | 23 |
4.9%
|
|
| internal filter | 7 |
1.5%
|
|
| put substance in the well | 1 |
0.2%
|
|
| put water bottles in the sun | 1 |
0.2%
|
|
| water filter | 424 |
89.8%
|
|
| water storasge chlorination | 1 |
0.2%
|