From the peaks of the Vosges, water seeps slowly underground through cracks in the rock. Then begins an underground journey of several hundred years which gives the natural mineral water of Wattwiller its original purity preserved. Indeed, three factors combined (a thick layer of clay, an artesian source, a catchment depth 150 m underground) constitute real natural shields against external attacks. Wattwiller is a commune in the Haut-Rhin department of the Grand Est region, which lies in the north-eastern part of France.