1号地A3号・白須8号泉 混合泉
No.1 A3 + Shirasu No.8 Blended SpringMixed source
Sampled at wellhead
曹
Bicarbonate
+ Sulfur
Classification
Sodium spring
A sodium-led bicarbonate spring with a sulfur edge — classic 'jūsō-sen' soda-water territory layered with the unmistakable rotten-egg note of H₂S. The wellhead runs hot at 83.5 °C, among Japan's hottest natural sources, and still reaches the bath at 71.8 °C. Weakly alkaline (pH 8.2) and lightly mineralized, it sits in the Japanese 'beauty-water' family — soft on the skin despite the heat. Diluted with fresh water at the bath but otherwise served as flowing source water.
Source temperature
83.5°C
Hot
Tonicity
0.63g/kg
Hypotonic
Highlights
- Top-decile hot
- Sulfur-rich
Analyzed May 20, 2019·公益財団法人 宮城県公害衛生検査センター·Cert no. 1143
