Is this the world’s healthiest water? Is this the healthiest water in the World? Hallstein was the first water to be completely tested for Microplastics, PFAS and all contaminants .. and only minor nitrate was found at extremely low levels. Hallstein is sourced from a deep artesian aquifer (~700 ft deep) beneath the Dachstein mountain in Austria and filtered through limestone. Where it picks up beneficial minerals: - Calcium at 20 mg/L - Magnesium at 9.8 mg/L - Trace levels of Potassium, Chlorid