DIY: How To Measure TDS Contents Of Drinking And Mineral Water At Home

Мineral waters are often in the category of ‘hard waters’ due to its high mineral contents. They can include salts, sulfur and many more chemical compounds. Drinking mineral water may have some health benefits, but can pose health issues if you are consuming too much on daily basis. Maintaining good mineral balance in you body can be essential to prevent many diseases and should be done very carefully.

It is very common practice to buy mineral water for home consumption. With more more than 4,000 brands of mineral water available worldwide it is a huge market. Due to contaminations and lack of adequate water treatment plants many people experience the need to buy bottled water everyday. While all the bottled water is safe to drink, using it for a long time may have severe impacts on your health. That’s why the most easy thing to do is buying different brands of water with less overall mineral contents.

Check TDS contents of mineral water

I had kidney stones in the past and know hard water is a probable cause. To lower the chances of forming new ones I’ve decided to start drinking water with low mineral content. Drinking tap water is not an option where I live, since it is contaminated even with Uranium apart from being very hard. I rely primary on buying bottled water and filling my own gallons with spring water.

I came up with the idea to check the TDS contents of every water I drink in a non-scientific way. A one that anyone can perform in home conditions with simple tools. It may not provide exact data with numbers, but is reliable way to see these solid particles with your eyes. To perform it you need three simple things.

  • A bottle of water you want to test
  • Cat or dog bowl
  • Sunny place in home

Here is how to measure overall hardness and TDS

How to measure water TDS at home - pour water into dog bowl
Pour one glass on water in the dog’s bowl.
  1. Open the water you want to test
  2. Pour water into a glass. Do this to be able to measure exact quantity for future tests and comparisons.
  3. Pour the water from the glass into the pet bowl. I recommend to use a black one ( I’ve a spare IKEA Lurvig bowl for my German Spitz ). Black color is the best choice since it will attract more sunlight than any other color to heat up the cup and you will see the results better.
  4. Put the bowl on a sunny spot in your home. I’ve perfect location in my home where is sunny from 7 am to 9 pm in the summer.
  5. Wait until all the water evaporates. This may take different time according to the geographic location you are living or season of the year. If outside is humid put the bowl in you home behind a sunny window.
  6. Check out the results.
How to measure water TDS at home put on sunny place
Put the bowl on sunny place.

The results may vary greatly depending on the tested water. When the water evaporates all the TDS should be visible to naked eye. You can simply tell the contents of a single glass of water by looking at the white powder left after evaporation. The more it is, the higher TDS contents this water have. Here I am checking the content by rubbing my finger into the bowl’s bottom.

 How to measure water TDS at home with my finger

This test is very useful for people living in areas with access to public fountains, wells and mineral springs. I’m living in Bulgaria, a country very rich in natural water sources, fortunately. There is a custom that you do a good deed if you build a fountain. This way anyone passing by it can drink and refresh and say a good word about you. This tradition has lead to hundreds of good sources of drinking water established through the centuries.

The water from these fountains and wells is not inspected by authorities in most cases. Only the certified mineral springs and some city fountains are check and has accurate data about water contents. Because of that I wanted a free and reliable way to check for TDS in water I drink. Do it for yourself and measure water hardness without paying a single cent.

How to measure water TDS at home - TDS are the white powder at the bottom
TDS are the white powder at the bowl’s bottom.

It is essential to check all mineral water for total dissolved solids ( TDS ). These solids include all inorganic and organic substances present in water. Use this characteristic as most basic indicator for presence of mineral elements in water you drink. Below is table with average quantities of calcium, magnesium, potassium and sodium in most popular mineral waters.

BrandQuantityCalciumMagnesiumPotassiumSodium
Apollinaris34 oz / 1 litre
100 mg (10% DV)
130 mg
(33% DV)
20 mg
(<1% DV)
410 mg
(17% DV)
Perrier34 oz / 1 litre170 mg
(17% DV)
6 mg
(2% DV)
1.5 mg
(<1% DV)
12 mg
(<1% DV)
Gerolsteiner34 oz / 1 litre348 mg
(35% DV)
108 mg
(27% DV)
11 mg
(<1% DV)
118 mg
(5% DV)
Vichy34 oz / 1 litre54 mg
(5% DV)
9 mg
(2% DV)
48 mg
(1% DV)
1110 mg
(46% DV)

San Pellegrino
34 oz / 1 litre200 mg
(20% DV)

52 mg
(10% DV)
4 mg
(<1% DV)
36 mg
(2% DV)
Evian34 oz / 1 litre78 mg
(8% DV)
24 mg (50% DV)1 mg (<1% DV)5 mg (<1% DV)

Currently most of the water sold worldwide is purified tap water. There are many brands that sell this kind of water which is perfectly safe for use and often very low in mineral content. Still if you want to check the characteristic of particular water brand Fine Waters’ bottled water list is good resource.

Recent Content