Permissible range of total dissolve solid (TDS) in drinking water Total dissolved solids (TDS) comprise inorganic salts and small amounts of organic matter that are dissolved in water. The principal constituents are usually the calcium, magnesium, sodium and potassium and the anions carbonate, bicarbonate, chloride, sulphate and, particularly in groundwater, nitrate .TDS is expressed in units of mg per unit volume of water (mg/L) or also referred to as parts per million (ppm).
Permissible range of TDS in drinking water Different government has different regulations for the TDS level. Jordan sets the maximum contaminant level for TDS 500 ppm whereas WHO has different prescribe limits.
Best TDS Level Suggested In entire world water Filters / Purifiers TDS level cannot be regulated except in the new innovation of KENT's Mineral RO™ Technology. Where the TDS level should be between (50 - 150) ppm for normal working people. It is considered that people who have kidney problem, might have water level below 100ppm which might help in their health situation.
The Great Innovation Keeping in mind the disadvantages of RO technology, KENT has invented a new technology called the KENT's Mineral RO™ Technology. This patented technology has all the benefits of the RO technology, while eliminating its limitations. KENT’s patented KENT's Mineral RO™ Technology uses an innovative TDS (total dissolved solids) control valve which allows the user to control the amount of essential natural minerals present in drinking water. It ensures that the RO purified water does not have a bitter taste and the pH is maintained around 7. It also enables the user to adjust the amount of TDS in purified water according to one’s taste. This technology is based on double purification wherein water after passing through RO, is also passed through Ultra Violet (UV) radiation and Ultra Filtration (UF). Secondary purification by UV/UF ensures that when the pores of RO membrane open up and allow harmful micro-organisms to pass through, they get deactivated/filtered out by UV/UF.Health Organization, a panel of tasters & health came to the following conclusions about the preferable level of TDS in water:
Taste of Water with Different TDS Concentrations Level of TDS parts per million (ppm) Rating Between 50 - 150 Excellent ( For everyone ) 150 - 250 Good ( for athletes) 250 – 300 Fair (Might be bad for kidneys) 300 - 500 Poor (Might be very bad for kidneys) Above 1,200 Unacceptable
Sources of TDS Some dissolved solids come from organic sources such as leaves, silt, plankton, and industrial waste and sewage. Other sources come from runoff from urban areas, road salts used on street during the winter, and fertilisers and pesticides used on lawns and farms. Dissolved solids also come from inorganic materials such as rocks and air that may contain calcium bicarbonate, nitrogen, iron phosphorous, sulphur, and other minerals. Many of these materials form salts, which are compounds that contain both a metal and a non-metal. Salts usually dissolve in water forming ions. Ions are particles that have a positive or negative charge. Water may also pick up metals such as lead or copper as they travel through pipes used to distribute water to consumers.