Espresso is 98.3% Water
Baristas have long known about the importance of water for great espresso. Espresso is 98.3 percent water, so if the mineral content is too high, or even too low, or if the water is high in chlorine, espresso won’t have the proper flavour or aroma. And since brewers operate at high temperatures, scale will build within the boilers and clog or reduce the life of the equipment.
Everpure Softening, Filtering & Buffering Systems
Heavy metals in water refer to heavy, dense, metallic elements that occur in trace levels, but are very toxic and tend to accumulate.
Most heavy metals are too rarely found in water to justify government regulation, but a few have been given an MCL (Maximum Contaminant Limit) by the EPA...