noun
drinking spring water; taking the waters; medicinal onsen water drinking
Refers to drinking natural spring or hot-spring water, often for health or therapeutic purposes. Common in contexts of onsen resorts and balneotherapy.
この温泉地では飲泉が健康に良いとされている。
In this hot spring area, drinking the spring water is said to be good for your health.
飲泉所で温泉水を試してみた。
I tried the hot spring water at the drinking fountain.