みどり荘温泉
Midorisou OnsenSampled at wellhead
酸
Acidic
+ 単純硫黄泉
Classification
Hydrogen Sulfate spring
A self-flowing source in Beppu's Myoban district, classified as a strongly acidic simple sulfur spring (hydrogen-sulfide type) at pH 2.7. At the wellhead the water is colorless and clear yet carries a sharp metallic edge and a strong rotten-egg note of H₂S. It is also rich in metasilicic acid (145 mg/kg), the kind of silica that leaves a thin film for noticeably smoother skin.
pH
2.70
Acidic
Source temperature
43.8°C
Hot
Tonicity
0.39g/kg
Hypotonic
Free CO₂
75mg/kg
Low
Free H₂S
14mg/kg
Very high
Radon
17Bq/kg
Low
- Color
- colorless and clear
- Taste
- strongly metallic
- Odor
- strong hydrogen sulfide
Highlights
- Ultra-acidic
- Sulfur-rich
- High silica
Analyzed Oct 14, 2009·社団法人 大分県薬剤師会·Cert no. 大薬検第7R-21100009号