Depending on the water ...
Published by Sabin Bisht, Pinetree Corporation - MD
Depending on the water salinity, boron concentration and temperature, two main processes are used to produce drinking water below 0.5 mg/L of Boron: This link is helpful, you may like to read. http://www.lenntech.com/processes/desalination/post-treatment/post-treatments/boron-removal.htm