Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Menchuka Hot Springs, in Shi-Yomi district, Arunachal Pradesh, taps alkaline bicarbonate water (pH 8) at 42°C. The open-air pool, tucked in the Himalayan Mechuka valley, suits wild bathing.
Insider tip — Menchuka (Mechuka) lies in a lush alpine valley at around 1,800 m surrounded by snow-capped peaks near the McMahon Line, making it one of the most isolated thermal spots in Northeast India. The bicarbonate springs emerge from riverbank outcroppings and have been used by the Memba community for generations. Access requires a lengthy jeep ride over rough mountain tracks from Along (Aalo), and an inner-line permit is mandatory for non-residents. The springs are best enjoyed in October-November when the valley turns golden and skies are crystal clear.