Table 5 Suitability of water for laundry usage according to its total hardness [67]
Classification | Total hardness (mg/l as CaCO3) |
|---|---|
Soft | < 75 |
Moderately hard | 75–150 |
Hard | 150–300 |
Very hard | > 300 |
Classification | Total hardness (mg/l as CaCO3) |
|---|---|
Soft | < 75 |
Moderately hard | 75–150 |
Hard | 150–300 |
Very hard | > 300 |