Total Dissolved Solid (TDS)

These minerals can include everything from iron to calcium — basically, the stuff our bodies need to stay healthy.

• To measure this, people use a TDS meter. Here’s a simple way to understand the readings:

0–70 ppm: Water is close to distilled — very pure.

70–150 ppm: Water is safe and drinkable.

Above 150 ppm: Water is still drinkable but tends to be harsher and may contain unwanted contaminants — not ideal for our bodies.