Borate B(OH)4- is a compound of Boron. Most of the world's boron is contained in sea water. Sodium borate in water occurs in arid regions where inland seas once existed but the water has long since evaporated. Boron in water is frequently present in fresh water supplies in these same areas in the form of non-ionized boric acid. Elemental boron in water and borates are non-toxic to humans and animals and is very similar to common table salt. Generally speaking Borates are more toxic to insects than to mammals. The amount of boric acid is not limited by drinking water standards, but it can be damaging to citrus crops if it is present in irrigation water and becomes concentrated in the soil.
Boron Water Treatment - Boron in drinking water behaves like silica. Effective Boron water treatment and removal uses an Anion Exchanger or adsorbed utilizing an Activated Carbon Water Filter.