Water - the other factor that could change how your cup of coffee tastes

The other factor that stands in the way of your perfect cup of coffee - water! The beans can be the same but depending where and when you brew, the taste might just differ.

Some of the compounds in hard water are "sticky," glomming onto certain compounds in coffee when they meet in your coffee-making device. The more eugenol the water hangs on to, for example, the woodsier the taste of your coffee will be. 

Meanwhile, if you use soft water - the distilled type - the coffee would always taste the same. So for a consistent brew, you know what to do. 

via Tech Insider.