What does the TDS meter measure?Updated 2 months ago
What TDS means
The TDS meter included with every ZeroWater pitcher measures the total dissolved solids (TDS) in your water — everything from minerals to metals and other impurities that are dissolved in it. The reading is shown in parts per million (ppm): the lower the number, the fewer dissolved solids are left in your water.
Why this matters
Your TDS reading tells you exactly how well your filter is performing, and it's the easiest way to know when it's time for a replacement.
More information
For a full explanation of TDS and why ZeroWater removes it, see What are Total Dissolved Solids (TDS)?. To find out when to replace your filter based on your reading, see When should I replace my ZeroWater filter?.