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Water Quality Parameters Sodium (Na)Sodium in a water supply normally results from dissolution of salt deposits. Another potential source for sodium is the water-softening process. The softening process reduces hardness by replacing calcium and magnesium with commercial sodium salts. People on sodium-restricted diets should consult with their doctor on finding alternative water sources or not use a water softener. The aesthetic objective is set at a maximum of 300 mg/L. |