WHO & BIS standard are ...
Published by Rajendrakumar Saraf
WHO & BIS standard are liberal when no alternate source of water is available. Where is the location? If in Rajasthan then people are accustomed with such type of water. However as such there is no process available which can remove soluble solids from water without using RO. You can try softener, Blend soften water to 50 mg/l of hardness.