Baristas use custom mineral water recipes to improve home coffee taste

Coffee industry sourcing expert Jose Lepe of Sightglass Coffee explains that high-end coffee shops often use reverse osmosis systems to strip tap water down to pure H2O, then remineralize it to a specific balance for optimal flavor. The report notes this same process can be replicated at home without expensive equipment, and contrasts tap water mineral profiles in cities like New York, Los Angeles and London to show how local water quality affects both coffee taste and machine longevity.