What Is TDS?
TDS stands for Total Dissolved Solids and refers to organic and inorganic substances, like minerals, salts, metals, and even tiny organic particles, dissolved in drinking water. These affect how your water tastes, looks, and smells, and come from natural sources (like groundwater) or man-made ones (such as aging pipes or road salt run-off)
Why does TDS matter?
Measuring the TDS level gives you a quick snapshot of your water’s purity. Higher TDS often signals more dissolved substances, which could include unwanted contaminants. Lower TDS is a sign of cleaner, purer water that hydrates better and tastes fresher .
Where does TDS come from?
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Natural sources
Minerals, salts, and ions from natural sources like rivers and groundwater contribute to total dissolved solids (TDS) in drinking water, influencing taste and quality. Monitoring and treatment ensure potable water.
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Human activities
Human activities, such as industrial discharges, agriculture, and urban runoff, contribute to elevated total dissolved solids (TDS) levels in water bodies, impacting aquatic ecosystems and necessitating water quality management.
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Wastewater and contamination
Industrial waste, mining runoff, and water pipe erosion contribute to water pollution, introducing harmful substances and elevated total dissolved solids (TDS)
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Environmental disruptions
Decomposing algae, plants, and deceased animals release organic matter into water, increasing total dissolved solids (TDS). Effective water treatment is essential to maintain quality and safety.
How we measure TDS
We use an easy-to-use TDS meter that reads parts per million (ppm). A reading of 60 ppm means there are 60 dissolved ions per million molecules of water. With ZeroWater filtration, your TDS reading drops to 000, meaning all dissolved solids, including minerals, metals, and chemicals, have been removed
To measure = To know
Every ZeroWater jug and dispenser comes with a free TDS meter, so you can instantly test the quality of your water before and after filtering. Unlike standard filters that only reduce taste and odor, ZeroWater removes virtually all dissolved solids, bringing your water down to 000 TDS. With just one quick test, you can see the difference for yourself.
Curious about the water in your area? Check out the interactive TDS map on this page, built from real customer readings across Europe. It’s a powerful reminder that not all tap water is the same, and why measuring your water matters.
