河原の湯・湯前湯4号水 混合泉
Kawara-no-Yu and Yumae-no-Yu No.4 Blended SourceMixed source
黄
Sulfur
+ Sulfate · Chloride · Bicarbonate
Sodium Chloride spring
Hot source · 75°C
Composition fingerprint
Na⁺90
Cl⁻64
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Chloride Cl⁻
- table-salt anion — coats the skin and holds heat in.
Known good for
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
A sulfur-bearing sodium spring layering sulfate, chloride, and bicarbonate — drawn at 74.8 °C and delivered to the Kawara-no-Yu and Yumae open-air baths at 43.9 °C and 46.6 °C respectively. Near-neutral at pH 7.2, it carries a soft hydrogen-sulfide note with a salty edge from chloride and a touch of bicarbonate softness. The source sits among Japan's hotter natural wellheads, blended in a mixing tank from two parent wells.
Sampled at mixing tank·公益社団法人 宮城県公害衛生検査センター