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Reverse Osmosis (RO) Rejection Table

Contaminant

Rejection Percentage

Contaminant

Rejection Percentage

Aluminium

96–98%

Magnesium

93–98%

Ammonium

80–90%

Manganese

96–98%

Arsenic

94–96%

Mercury

94–97%

Bacteria

99+%

Nickel

96–98%

Bicarbonate

95–96%

Nitrate

90–95%

Borate

30–50%

Orthophosphate

96–98%

Boron

50–70%

Phosphate

95–98%

Bromide

90–95%

Polyphosphate

96–98%

Cadmium

93–97%

Potassium

92–96%

Calcium

93–98%

Pyrogen

99+%

Chloride

92–95%

Radioactivity

93–97%

Chromate

85–95%

Radium

97%

Copper

96–98%

Selenium

97%

Cyanide

85–95%

Silica

80–90%

Detergents

97%

Silicate

92–95%

Ferrocyanide

98–99%

Silver

93–96%

Fluoride

92–95%

Soduim

92–98%

Hardness (Ca & Mg)

93–97%

Sulfate

96–98%

Herbicides

97%

Thiosulfate

96–98%

Insecticides

97%

Viruses

99+%

Iron

96–98%

Zinc

96–98%

Lead

95–98%