If you are into craft beer it is probably because of the Hops or Barley Malts. Maybe you will eventually think about the yeast. But who are those people that give even the slightest thought about water used in making beer. But, water makes up 90-95% of beer. Waters chemistry is high science. All the chemicals and minerals in water has a part to play in how hops, yeast and malts interact to make craft beer. A good brewer knows how to amend water to make each style of beer. Yeah it is science but art brings it together. Try comparing a glass of tap water and bottled water.