Onsensui 99 (温泉水99)
Japan (Kagoshima) · Alkaline · sold in JapanWhat's in it
| Label | 43better.com Tarumizu hot spring, Kagoshima | |
|---|---|---|
| pH | 9.7 | — |
| Hardness mg/L as CaCO₃ | 1.7 | 1.7 |
| Calcium (Ca) mg/L | — | 0.5 |
| Magnesium (Mg) mg/L | — | 0.1 |
| Potassium (K) mg/L | — | 0.8 |
| Silica (SiO₂) mg/L | — | 36.8 |
- 43better.com — Tarumizu hot spring, Kagoshima (label per 100 ml × 10) · report ↗
Hardness and alkalinity are both in mg/L as CaCO₃, so they compare directly; grey numbers are worked out (hardness from Ca + Mg, alkalinity from HCO₃).
The label gives typical values; each measurement is one sample, so they differ a little. The Water list uses the label, and a measurement only where the label says nothing.
+ Add a measurement — members, on Tea Notes
About
Extremely soft hot-spring water, pH about 9.5–9.9.
Numbers: Brand label / published water-quality report (typical values). Labels change and springs differ — check your bottle.