中之郷温泉2号井
Nakanogo Onsen Well No. 2Operated by · 八丈町長 山下
Sampled at wellhead
塩
Chloride
Classification
Sodium Chloride spring
A sodium chloride hot spring at 45.7 °C, isotonic and near-neutral (pH 6.0 at the wellhead). Moderately mineralized at 9.87 g/kg, with noticeable body — salty, heat-retaining chloride water. Metasilicic acid is generous at 152 mg/kg, leaving the kind of thin silica film that makes skin feel smoother afterwards, in the Japanese "beauty-water" family. The lab sample develops a faint iron note on standing, hinting at the trace iron the cert reports.
pH
6.00
Neutral
Source temperature
45.7°C
Hot
Tonicity
9.87g/kg
Isotonic
Flow rate
150L/min
Typical
Free CO₂
239mg/kg
Low
- Color
- colorless and clear, slightly salty, slightly ferrous, odorless
- Taste
- slightly salty, slightly ferrous
- Odor
- odorless
Highlights
- High silica
Analyzed Jun 27, 2023·公益財団法人 中央温泉研究所·Cert no. 第3826号
