Boron is a non-metallic element found in the ground and many food products. It is used in glass manufacture, cleaners, antiseptics, flame retardants, fertilizers, algaecides, insecticides and herbicides. The concentration of boron in drinking water can be reduced by activated carbon or lime softening. High doses of boron are poisonous to humans leading to gastro-intestinal problems, skin eruptions, etc. Based on health considerations, the concentration of boron in drinking water should not exceed 0.3 mg/L.