鉄輪温泉管理組合
Kannawa Onsen Kanri Kumiai SpringOperated by · 鉄輪温泉管理組合
Sampled at mixing tank
湯
Simple
Classification
Sodium-Calcium Sulfate-Chloride spring
A simple thermal spring drawn at the storage-tank outlet in Kannawa. It is lightly mineralized at 385 mg/kg and gentle on the body, yet emerges piping hot at 69.9 °C — among the hotter natural sources. Weakly acidic with a faint hydrogen sulfide note, it carries 124 mg/kg of metasilicic acid, leaving a thin silica film that makes the skin feel noticeably smoother — close to the Japanese beauty-water family.
pH
4.20
Weakly acidic
Source temperature
69.9°C
Hot
Tonicity
0.39g/kg
Hypotonic
Free CO₂
87mg/kg
Low
Free H₂S
0.40mg/kg
Low
- Color
- colorless, very faintly cloudy white
- Taste
- very faintly sour
- Odor
- moderate hydrogen sulfide odor
Highlights
- High silica
- Top-decile hot
Analyzed Sep 21, 2021·公益社団法人大分県薬剤師会検査センター·Cert no. 大薬検 第 7R-21090009号