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What is TDS in a Water Purifier?

By Finserv MARKETS - Oct 18,2019
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What is TDS in Water Purifier?


While it is sad that the water that passes through our taps is full of germs, bacteria, and several hazardous chemicals, it is also helpful to know that modern science has equipped us with the tools to deal with these dangers effectively.

Total dissolved salts (TDS) are the primary contaminants present in commonly-available water in cities even after complete standard filtration. These are contaminants that are larger than two microns in size. A fine filter successfully removes particles that are more than 0.45 microns in size. Therefore, you can use a premium water filter to ensure that the water that reaches you is clean and safe for drinking and related uses.

What is TDS in Water?

A moderate to a high level of TDS in drinking water changes the taste of the water besides being harmful to one’s health. Thus, it becomes essential to remove TDS before you consume the water.

However, how to get rid of TDS or even measure it is hardly common knowledge. People usually trust water purifiers to get the job done but might not know the right questions to ask to learn if their purifier can get rid of the TDS content in water. The best water purifiers in India, are fully equipped to eliminate toxins from water to make it safe for consumption.

What is TDS in a water purifier? Keep reading to learn more about how to ensure that your water purifier is getting rid of germs, bacteria, and harmful chemicals and taking care of the TDS content in water.

How to Check the Correct TDS Level of a Drinking Water at Home?

The TDS levels in your water can be measured through a TDS meter that gauges the amount of TDS present in the water. Presence of chemicals like potassium, sodium and chloride increase the level of TDS in water.

What should be the TDS of drinking water? A TDS level of more than 1000mg/L is generally considered unfit for consumption. A level of 50mg/L to 150mg/L is acceptable for drinking and is ideal for areas where the water is polluted by sewage or industrial waste.

The Bureau of Indian Standards (BIS) has set the acceptable upper TDS limit in water at 500ppm. However, the World Health Organisation (WHO) recommends an upper TDS level of 300 ppm.

How to Remove TDS from Water?

The TDS content in water can be removed through TDS controllers in water purifiers. These are available in electric water purifiers with TDS technology.

There are multiple methods of water purification. The methods of TDS filtration in water purifier are listed below:

Reverse Osmosis (RO): Reverse Osmosis is the process of filtering water by passing it through a semipermeable membrane. The best water purifiers in India are equipped with this technology that filters molecules smaller than 0.0001 microns. This not only eradicates bacteria, germs, and other harmful chemicals but also gets rid of TDS while the water undergoes optimum filtering.

Distillation: The distillation process is quite elaborate. The water is boiled and changes form to become water vapour, which is then collected upon a cool surface and converted back to water in liquid form. Since the salts that were originally present in the water cannot vapourize, they remain in the container with the boiling solution.

Deionization: For deionization to work, the water must first pass through a semipermeable membrane like those in RO water purifiers to remove the non-ionic organic contaminants. Then, the water is passed through a positive and negative electrode. The ion-selective membranes enable the positive ions to separate from the water and move to the negative electrode. The resultant solution is deionized water, which has a high purity level.

How much TDS in Water is Good for Health?

A TDS level between 150mg/L to 350mg/L is considered optimum and ideal for people with cardiovascular diseases. It is widely considered to be the best TDS level for drinking water.

TDS is often forgotten while customers look for water purifiers in the market. However, TDS is a significant concern, especially in areas near industrial parks or locations. The next time you set out to buy a water purifier to ensure optimum care for yourself and your family, inquiring about TDS technology should be at the top of your checklist.


If you are looking for some of the best water purifiers, the Bajaj Finserv EMI Store is the right choice. The latest water purifiers with cutting-edge technologies are available on the EMI Store at the lowest prices and on No Cost EMI plans, with zero down payment facility applicable on select models.


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