Spring Water
Spring
noun
A well of water that pops up naturally is called a spring and that water is spring water.
ゆうすい
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
地下水が地表に自然に出てきたものを、湧水といいます。
Underground water that naturally comes to the surface is called a spring.