Quiet Water is the 33rd track in the Undertale Soundtrack. It is primarily based on the Ruins theme. This track plays in parts of Waterfall that are more populated, be that near Gerson or the Nice Cream Man. It also plays in Hotland at Muffet's Spider Bake Sale. Compared to the speed in the game files, it plays slower in-game and in the OST.
Like most of the music tracks within Undertale, this song is also profusely slowed down during the Genocide Route.