4号源泉
Bessho Onsen Spring No. 4Operated by · 別所温泉財産区
- Color
- nearly colorless and clear
- Taste
- not recorded
- Odor
- with a hydrogen sulfide note
Sodium Sulfate-Chloride spring
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Sulfate SO₄²⁻
- "gypsum / Glauber's salt" — vessels and wound healing.
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
An alkaline simple-sulfur spring drawn at 50.9 °C — high-temperature class. The water is near-colorless and clear at the wellhead but carries an unmistakable hydrogen sulfide note, and the 12.4 mg/kg of HS⁻ comfortably clears the sulfur-spring threshold. At pH 8.8 it sits in the alkaline band, soft on the skin in the classic Bessho beauty-water style.
Sampled at wellhead·Analyzed Jul 5, 2004·長野県環境保全研究所