Reverse Osmosis Contaminant Rejection

Reverse osmosis (RO) is used to purify tapwater for drinking water in homes.

In addition to removing excess or harmful minerals, reverse osmosis removes odor, color, chemicals, and other organic compounds and contaminants, which contribute to bad taste or health concerns.

Benefits of RO water include:

  • Safer drinking water: Consumers want safe, healthy, good-tasting water. RO purified water meets the requirements of the Safe Drinking Water Act and EPA standards for drinking water.
  • Good taste: RO removes excess minerals, odor, color, and other organic compounds that contribute to bad taste.
  • Health: RO membranes provide a barrier to bacteria and virus resulting in healthier water for drinking and cooking.
Contaminants Reduces /Rejects Contaminants Reduces /Rejects
Sodium Yes Chromium-6 Yes
Calcium Yes Chromium-3 Yes
Magnesium Yes Sodium Yes
Potassium Yes Lead Yes
Iron 2 Yes Chloride Yes
Manganese 2 Yes Bicarbonate Yes
Aluminum Yes Nitrate3 Yes
Copper Yes Fluoride Yes
Nickel Yes Phosphate Yes
Zinc Yes Chromate Yes
Strontium Yes Cyanide Yes
Cadmium Yes Sulfate Yes
Silver Yes Arsenic + 3 Yes
Mercury Yes Arsenic + 5 Yes
Barium Yes Selenium Yes
Radioactivity Yes Asbestos Yes
Bacteria Yes Sediment Yes
Protozoa Yes Turbidity Yes
Ameobic Yes Giardia Yes
Cysts Yes    
Organic Contaminants Organic molecules with a molecular weight < 300 Yes Organic molecules with a molecular weight < 3005 Yes

This information is extracted from the Water Quality Association WQA.

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