The Groundwater Geochemistry and the Human Health Risk Assessment of Drinking Water in an Area with a High Prevalence of Chronic Kidney Disease of Unknown Etiology (CKDu), Sri Lanka

Table 1

Water hardness scale.

Total water hardness (mg/L)	Status
<60	Soft water
60–120	Moderately hard water
120–180	Hard water
>180	Very hard water