蔵王温泉南地区給湯
Zao Onsen South District Hot Water SupplyOperated by · 蔵王温泉南地区給湯組合
Mixed source
酸
Acidic
+ 含硫黄泉 · Sulfate · Chloride
- Color
- colorless and clear
- Taste
- strongly astringent
- Odor
- strong hydrogen sulfide
Aluminum-Hydrogen Sulfate-Chloride spring
pH 2.1AcidicHot source · 52°CUltra-acidicSulfur-richHigh silica
Composition fingerprint2.4 g/kg dissolved · Hypotonic
Al³⁺34
H⁺25
Mg²⁺17
SO₄²⁻66
Cl⁻22
◀ CationsAnions ▶
- Aluminum Al³⁺
- shows up in acidic volcanic water.
- Sulfate SO₄²⁻
- "gypsum / Glauber's salt" — vessels and wound healing.
Known good for
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
A blended source: six Zao wells are brought together in a mixing tank and delivered as the south-district supply. The water is strongly acidic and sulfur-bearing, with sulfate and chloride giving it body — sharp enough to prickle on contact, strongly astringent on the tongue, and unmistakably scented with hydrogen sulfide despite running colorless and clear. Metasilicic acid reaches 226.5 mg/kg, leaving the kind of silica film that makes skin feel noticeably smoother afterwards. The house adds no water; in winter the bath may be recirculated and reheated for temperature control.
Sampled at mixing tank·Analyzed May 9, 2016·日本環境科学株式会社·Cert no. 第327号