The Secret to Awesome Coffee? It's in the Water

Coffee, on its surface, is an incredibly simple beverage: just add hot water to ground up roasted beans. However -- as in any great pursuit -- achieving perfection remains elusive. In the quest for the flawless cup of coffee, aficionados have looked at everything from roasting technique, to method of grinding, to the perfect ratio of water to coffee (said to be 17.42 units of water to 1 unit of coffee). But less often considered is the water itself. While we tend to view tap water as a pur