How "mineral-rich" is measured
Total Dissolved Solids (TDS) is the standard yardstick — the combined mg/L of every dissolved mineral the water carries up from its source. Anything above 1,500 mg/L is considered highly mineralised by EU regulation, and the top of this list crosses 13,000 mg/L. Most of these waters are therapeutic-grade — drink them for flavour and minerals, not for volume.
