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Minimum TDS Level for Drinking Water

Last updated on April 28, 2020

Drinking water is totally necessary for living a healthy life and maintaining a steady lifestyle. But do we ever think if our drinking water is containing essential minerals? Well, in most cases, we do not think while quenching our thirst.

If we give a thought on drinking water with minimum TDS level, then we all can maintain the required essential minerals for our body and also satisfy our thirst at the same go.

Have you ever heard about the term TDS? If not, then let us tell you that it is the most beneficent term, which will help you understand your drinking water’s vitality quotient.

Water is the most common & stable source for essential minerals, where TDS is the meter by which we can easily measure the number of minerals present in the drinking water.

What is TDS exactly?

TDS is the shorter form of Total Dissolved Solids. It reflects the total number of mobile particles(Organic and inorganic) in a given water volume.

These loose particles are not only essential minerals which are contained by your water but also the charged particles or ions, salts with every other vital particle for bodily needs. We measure TDS and express it in mg per unit volume of water.

This standard term often refers to Parts per Million or PPM. TDS or PPM is directly related to the purification process of water and “how purified your drinking water is”!

  • Dissolved Solids and Suspended Solids: Dissolved solids are the particles that dissolve in water whenever it is mixed up in the water, and there is always a saturation level of it. It can be any charged particle, likewise cations or anions, metals, salts, minerals, & everything that is mixed up with water in molecular form. Whereas Suspended solids are the particles that do not dissolve in water completely and neither settle. It can stay side-by-side with dissolved solids. If it is mixed up with water, then we can easily call it unpurified or maybe semiprufied water, mostly undrinkable. Here comes the compulsory choice of water purification
  • Drinking-Water: Complete purified Water is nothing but pure H2O, that is easily drinkable. It does not contain any harmful particle, which will cause damage to your body. But, neither it will help you hold the vital molecules if it is not included before drinking.
  • Dissolved Solids after purification: As we mentioned before, purified water does not contain any sort of elements, nor harmful nor healthy. But as total dissolved solids are necessary for our health. The water purification process helps to add up minerals, salts, metals, and other elements to stay while it removes only harmful particles that we do not require at all.

TDS concentration is the sum of concentrated particles or in simple words, average/concentrated ion counts in mg per liter of water.

What are the sources of these TDS?

There are lots of natural sources through which it gets added with natural drinking water like fountains and groundwater. It may be from plankton, leaves, rock salts of mountains, etc. There are inorganic sources as well, where it is mixed with water, such as industrial inorganic wastes, sewage, fertilizers, road salts, etc.

What are those particles chemically?

It can be anything compound or metal molecules chemically, but as we are more concerned about our health. So, the vital components which are required for our bodies are Iron, Phosphorus, Sulfur, Sodium or Calcium Bicarbonates, Nitrogen, Chlorine, Magnesium, etc.

All these are measured while the water purification process runs. The harmful metals for the body are Lead, Mercury, etc. are also estimated to keep those wholly filtered out.

What is ion?

Ions are electrically charged particles and the smallest particles that can be microscopically observed free moving in the water. Pure water can not conduct electricity as it has zero conductivity virtually.

If the free moving ions are present, then only water is electrically conductive. In general, all drinking water possesses ions in it as the purification process contains ions for keeping vital elements in drinking water.

How can we measure TDS?

The water purification process is very complicated but directly related to TDS measurement. The weight to weight ratio of ions to water is the actual measurement of PPM.

Instead of completely removing the TDS and then adding up the essential component with pure water, the purification process filtered out harmful agents in different layers. It reduces the less required elements and keeps the vital minerals and salts. TDS measurement usually can be calculated by the formula

  • TDS = KE * EC
  • KE= Correlational factor and
  • EC= conductivity quotient of Water or Electrical Conductivity

TDS unit mg/L

TDS and EC are directly proportional, so the more the EC, the more the TDS, whereas correlation factor varies 0.55 to 0.8

All these micro measurements are only required if you want to purify your water by yourself, but generally, it is being done by your municipality, water processing companies, and water purifier makers.

Why do you need to measure TDS?

This is simply because you need to have a unit range of which you can safely drink water after purification. As the water treatment process decimates unwanted parts from the water and keeps only the filtered particle, which is indispensable for good health.

So, our body would not sustain if it crosses the maximized limit and also not likely to absorb the crucial elements in the absence of it in the minimum unit.

What is the minimum TDS level in drinking water?

We have found out through our prolonged research that, the range of the TDS varies with geographical and geological differences around the world where minimum 30mg/L to 6000mg/ L data had been collected by the WHO(World Health Organization).

In India, the minimum acceptable level of TDS is 50mg/L, which is considered as standard where the minerals and vital quotient of salts are contemplated present. The upper limit of TDS, which is taken as drinkable water, is 500mg/L, though according to the journal of WHO the TDS level below 1000mg/L is also drinkable.

What is RO?

There are various processes through which water can be purified for the form of drinkable water. RO is Reverse Osmosis, - a process by which the safest and cleanest potable water can be made. It is seen by various tests that RO water is even better to consume than distilled water.

RO purifier even Chlorine from water to keep the chlorine level under control in drinking water. The conventional distillation system is not designed to remove chlorine and a few unacceptable particles.

A few Water purifier makers give you options to control the RO process along with TDS level control through your water filter in your home. This is satisfactory in terms of checking your regular drinking water TDS level and drinking water with TDS in an acceptable range.

UV protection: TDS level control does not solely depend on one or two purification process, preferably many ways; water can be treated for regular use of drinking. A few methods are contemporary and observed in India for decades before the water purifiers came to picture with technologies.

One of the best is the UV protection technique, which has been observed in India for many centuries. It is one of the fundamental methodologies considered in terms of purifying the water by exposing it in sunlight, using UV rays of the Sun.

What it does is, it kills living microorganisms. A lot of dissolved particles which come in organic ways through it, though it affects the pH level of the water as well. In modern days, the same technique can be found in water filters where the artificial UV rays do the same task vividly.

UV rays don’t filter out bacteria or viruses, but it helps us killing them, the filtration system does the rest of it.

So to maintain TDS in water, RO and UV both help in a lot of ways to control all over the minimum TDS level in your drinking water.

Why is the Minimum TDS level required for drinking water instead of other resources?

Eating food and getting essential collectibles for our body is the only other option that is available. Well, that is not an option, that should be the backup, when we would have a lack of water in our body and a regular source of water is not available nearby.

Though it is tested that proper food habits do not contain all the essential minerals that are required to keep our body healthy. Keeping the Minimum TDS level in drinking water is probably the safest and smartest way to collect the essentials and salts for our daily needs, as we have plenty of water resources available.

Organically all of these resources are packed with minerals, salts, metals and all the other dissolved materials. We just need to purify it and drink according to our necessities.

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