別府市温泉供給事業石垣線
Beppu Municipal Onsen Supply Project Ishigaki LineOperated by · 別府市
Sampled at bath inlet
湯
Simple
Classification
Sodium Sulfate-Chloride-Bicarbonate spring
A municipal Beppu source delivered at 68.5 °C — a properly hot simple thermal water classed as neutral and hypotonic. The chemistry is light overall (516 mg/kg dissolved solids) so the water doesn't push or sting, but a faint whiff of hydrogen sulfide drifts at the bath inlet. What lifts it above generic territory is the metasilicic acid: at 124 mg/kg the silica leaves the kind of thin, moisturizing film that makes skin feel noticeably smoother.
pH
6.40
Neutral
Source temperature
68.5°C
Hot
Tonicity
0.52g/kg
Hypotonic
Free CO₂
22mg/kg
Low
Free H₂S
0.20mg/kg
Low
Radon
7.40Bq/kg
Low
- Color
- colorless and clear
- Taste
- almost tasteless
- Odor
- faint hydrogen sulfide
Highlights
- High silica
- Top-decile hot
Analyzed Jun 26, 2019·公益社団法人 大分県薬剤師会·Cert no. 7R-1906009号