TDS (Total Dissolved Solids) is the total concentration of dissolved organic and inorganic substances such as minerals, ions and metals in water. These solids can be dissolved in water either naturally or artificially. Water flowing through regions where rocks have a high salt content is one of the main natural reasons for TDS in water. Artificial methods include mineral deposits caused by agricultural and urban runoff, industrial wastewater and wastewater discharges. 

Why does TDS matter?

The amount of TDS in the water you use can make a huge difference in the following areas-

  1. Taste – TDS makes a huge impact on the taste of the water you consume. High levels of TDS leads to a salty, bitter or metallic taste. Therefore, for the water to taste desirable, it is important to keep a check on the TDS levels.
  2. Health – High TDS in water can cause a number of health issues. This is because high TDS indicates the presence of increased toxic minerals, which can have a harmful effect on your body.
  3. Hardness or softness – Hard water is basically the type of water that has high levels of TDS. Hard water is bad for your skin as well as hair. It also leads to mineral deposits on everything it comes into contact with, causing a lot of problems.
  4. Cooking – TDS in the water used to cook your food can make a difference in the taste of the food. To ensure good taste, a proper TDS level needs to be maintained. 
  5. Cleaning – High TDS in water used for cleaning leads to mineral deposits that cause spots and stains which do not go off easily. 
  6. Appliances – High TDS water with calcium and magnesium tends to build up in pipes, leading to wear and tear of costly equipment. This causes the need for frequent repairs and replacements. 

What is the ideal TDS amount of drinking water? 

The desired TDS level differs as per recommendations from different organisations, and governments. According to Indian standards, the upper limit level for TDS in 500 parts per million. As per World Health Organisation(WHO), the ideal level is 300 parts per million.  

3 ways to reduce TDS in water 

Here are some of the ways in which TDS levels in water can be reduced. 

  1. Deionisation – In this process, water is made to pass through a membrane with a positive electrode. This separates dissolved solids from water and the water is de-ionised.
  2. Distillation – This is the most convenient method of eliminating TDS from water. This process works by boiling water so that the vapour rises to a cool surface and condenses back to form a liquid. The salts, due to their inability to vaporise, settle at the bottom thus being separated from the water. 
  3. Reverse Osmosis – RO water purifiers are the best solution to get rid of TDS. When water is made to pass through an RO Membrane, the dissolved solids are filtered out from the water. Only water molecules can pass through the membrane and this eliminates even the tiniest of unwanted particles. 

SKF Exiler water purifiers —  being the largest commercial water purifiers in India —  provide you with an ideal remedy against TDS.