温火湯
Atsuhi-yu SpringOperated by · 田辺市四村川財産区
Sampled at wellhead
黄
Sulfur
+ Bicarbonate · Chloride
Classification
Sodium Bicarbonate-Chloride spring
A sulfur-bearing sodium bicarbonate-chloride spring rising at a scalding 83 °C, placing it among Japan's hottest natural sources. It carries a moderate hydrogen sulfide note, with the white flecks of yunohana drifting in the water. Neutral in pH and soft on the skin, the bicarbonate character is rounded out by a salty edge, and a generous 178.5 mg/kg of metasilicic acid lends a smoothing touch.
pH
7.30
Neutral
Source temperature
83.0°C
Hot
Tonicity
1.75g/kg
Hypotonic
Free CO₂
55mg/kg
Low
- Color
- faintly yellow
- Taste
- moderately faint with a metallic edge
- Odor
- a moderate hydrogen sulfide note
Highlights
- Top-decile hot
Analyzed Apr 27, 2015·一般社団法人 和歌山県薬剤師会 医薬品・公衆衛生検査センター·Cert no. 第G1502077号