Was water from the Liffey ever used in brewing Guinness?

Yes, the water used to brew Guinness was traditionally drawn from the River Liffey in Dublin, Ireland. The Liffey water is known for its high mineral content, particularly calcium and magnesium, which contribute to the unique taste and smoothness of Guinness beer. Guinness has a long history of brewing in Dublin, with the St. James's Gate Brewery located on the banks of the Liffey since 1759. However, in recent years, Guinness has also begun to source water from other sources for brewing, including the Vartry Reservoir in Wicklow Mountains. Despite this, the Liffey water remains an iconic and important ingredient in Guinness beer.