<prompt> Moderately hard water has hardness level -13-Jan6-Mar6  <response>: Ans. is b i.e., 1-3 Classification of hardness in waterClassificationLevel of hardness mEq.litrea Soft waterb Moderately hardc Hard waterd Very hard waterLess than 1 50 mgL1 -3 50- 150 mgL3 -6150-300 mgLOver 6 300 mgL 