Hard water causes limescale precipitation when heated in coffee machines, which can easily damage, break, or clog equipment; this is a separate and serious problem beyond just poor coffee taste.

causalpending

Speaker

James Hoffmann

Evidence Quote

the problem with hard water is limescale and when I two coffee machines espresso machines filter machines heating that water up causes limescale to precipitate out and that can easily damage break clogged frustrate your coffee machine

Source

The Best Water for Coffee - An IntroductionJames Hoffmann
Created: 8/13/2026, 9:49:47 AM

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