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Total Dissolved Solids (TDS) – Good or Bad?

What is TDS? And is it good or bad for us?

Total Dissolved Solids (often abbreviated TDS) is a measure of the combined content of all inorganic and organic substances contained in a liquid : in molecular, ionized or micro-granular (colloidal sol) suspended form. Generally the operational definition is that the solids must be small enough to survive filtration through a sieve the size of two micrometer.

Water can be classified by the amount of TDS per liter:[8]

  • Fresh water < 1500 mg/L TDS
  • Brackish water 1500 to 5000 mg/L TDS
  • Saline water > 5000 mg/L TDS

Total Dissolved SolidsThe most common chemical constituents are calcium, phosphates, nitrates, sodium, potassium and chloride, which are found in nutrient runoff, general storm water runoff and runoff from snowy climates. Total Dissolved Solids (TDS) is a measurement of everything in your water – Good and Bad. The amount of TDS in water affects its taste, too little TDS and the water tastes flat. Many people find drinking pure water (such as distilled) to be unpleasant, and drinking water that has moderate amounts of TDS to taste good.

Elevated levels of TDS do not present a health problem and are actually good for you unless chemicals like chlorine and chloramines are present. Minerals such as calcium and magnesium are found in hard water and are good to have in drinking water. They help you get your daily recommended daily allowance of minerals. Water with zero TDS is bad for your health for two reasons. First, it does not supply any minerals, and research shows that we do not get enough minerals from our diet. The second reason, is because it is “hungry water” – it is hungry for minerals. There is significant evidence that water with zero TDS will actually steal minerals from your body!

Drinking water with moderate amounts of TDS may be the best water of all. In taste test, water with moderate TDS is preferred over other kinds of water. Better tasting water is important to our health because if it doesn’t taste good, you wont drink it and if you don’t drink it you will be voiding your body minerals.

The Pelican Premium Whole House Filter & Salt Free Softener will filter harmful chemicals like chlorine and chloramine and also address the negative effects of hardness while leaving the beneficial minerals in the water without the use of salt or electricity. Giving you better than bottled water quality from every tap in your home!



Pelican Combo System Salt-Free Water Softener Whole-House Water Filter

  • Chloride Flats

    According to the WHO, fresh water should have less than 500 mg per liter TDS. How does your products address this issue?

    • pelicanwater


      We have several systems that can reduce TDS include our Reverse Osmosis system and our salt based water softener.

  • Abdul Jabbar

    in our ground water, TDS is 2400 mg per liter.
    which type of health impacts it could have on our health.?