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Table 4 Classification of the water according to degrees of hardness in the studied area

From: GIS-based assessment of groundwater quality and suitability for drinking and irrigation purposes in the outlet and central parts of Wadi El-Assiuti, Assiut Governorate, Egypt

Water type Hardness No. of well samples
Soft water 0–55
Slightly hard water 56–100 6
Moderately hard water 101–200 19
Very hard water 201–500 71
Excessively hard water More than 500 23