What is TDS?
Measuring water TDS levels is the best way to understand your drinking water. Total Dissolved Solids are organic and non-organic sediments found in water, which contribute to a difference in the taste and appearance of water. Dissolved solids enter your water supply from a wide range of sources — old piping, run-off from road salts, pesticides, fertilisers, and more.
Where do Dissolved Solids come from?
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).
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.
Wastewater and Contamination
Industrial waste, mining runoff, and water pipe erosion contribute to water pollution, introducing harmful substances and elevated Total Dissolved Solids (TDS)
Wastewater and Contamination
Industrial waste, mining runoff, and water pipe erosion contribute to water pollution, introducing harmful substances and elevated Total Dissolved Solids (TDS)
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.
To measure = to know
ZeroWater is the only filter that filters the TDS value to 0, so that you are left with really pure and clean water. The ZeroWater filter is the only filter that filters lead, chromium and mercury (NSF certificate). ZeroWater removes 99% of all dissolved solids from your water (50% more than other brands).
Testing of drinking water in labs is expensive. That is why ZeroWater opted for a home test that is easy to perform. Use the tds meter supplied with the jug for this. Would you like to do the TDS test before purchasing a filter system? Then buy a separate tds meter in our store.
The TDS value of drinking water varies widely across Europe. We have readings from 60 ppm to a whopping 560 ppm. However, because there is a big difference between the values, ZeroWater asks all ZeroWater users to report their TDS values.

ZeroWater is the only water filter that removes 100% of PFAS, chlorine, chromium, zinc, and other substances from your tap water.
More and more research reveals just how many contaminants can end up in our drinking water — from PFAS and lead to chlorine and heavy metals. While regulations often take years to catch up, your health can’t wait.
That’s why ZeroWater provides detailed and regularly updated guides on the most concerning substances found in tap water, such as PFAS, lead, and chromium. These expert-backed dossiers help you stay informed about new scientific insights and changing legal standards — so you can make safer choices for yourself and your family.