Gerolsteiner enjoys a rich history dating as far back as 125 years. Wilhelm Castendyck discovered a carbonated water source in the beautiful Volcanic Eifel region in Western Germany in 1888. By 1890 they began exporting to the German emigrant population in Chicago and across the US. Fast forward to today and Gerolsteiner has become not only the #1 mineral water brand in Germany, but the most exported as well. The Volcanic Eifel region in Western Germany offers a unique geographical profile. Water seeps through the Earth's crust and filters through the mineral rich dolomite rocks, which are specific to the Gerolstein region. The carbonic acid that the water picks up from the volcanic rocks dissolves the calcium and magnesium in the dolomite rocks. This is how Gerolsteiner achieves its exceptional mineral quality. The balanced nature of all the minerals in Gerolsteiner is what give it the clean and natural flavor.