What is TDS?

Total Dissolved Solids (TDS) is the measurement of all the non-organic impurities that dissolved in a water sample.

TDS, The “Sciency” Definition:

Dissolved Solids are a measurement of compounds like minerals, salts and organic compounds that are dissolved into water through contact with rock and other surfaces. TDS can be made up of several different types of compounds (including but not limited to): calcium, magnesium, iron, sodium chloride and sulfides (which are compounds frequently found in groundwater supplies).

*Increased levels of TDS (total dissolved solids) may affect taste and appearance of your water.

Why Should You Measure TDS?

Measuring water TDS levels is the best way to understand the quality of your drinking water. Total Dissolved Solids are non-organic impurities found in water, which contribute to a difference in the taste, odor and appearance of water. Dissolved solids enter your water supply from a wide range of sources — old piping, run-off from road salts, pesticides, fertilizers, and more. 

What is the TDS Water Test?

Get a TDS Meter for Your Home

How Clean Is Your Water?

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Your TDS Score:

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010 - FDA maximum allowable TDS for purified bottled water 500 - EPA recommended maximum TDS for tap water

Low TDS vs High TDS

When it comes to measuring TDS of drinking water it is important to ensure your meter is reading at an acceptable level. A high TDS level means there is an increased amount of total dissolved solids, which can affect the taste and odor of water. A low TDS level means there are fewer dissolved solids and your water is made up of mostly pure water molecules, leaving a much better tasting water.


Help Us Keep Our TDS Up To Date

Do you have a water quality meter at home? Test your water at home and submit your TDS score below. Help us keep TDS metrics up to date!