Softening is recommended when hardness of water is more than:
Softening is recommended when hardness of water is more than 150 mg/L (> 3mEq/ L). Softening of water is done by Temporary hardness Permanent hardness Boiling Lime NaCo3 Permutit NaC03 Base exchange
50mg/litre
75mg/litre
100mg/litre
150mg/litre
Water