America's premium water since 1871. National Headquarters Hot Springs National Park, Arkansas. NSF certified. Est. 1871. This bottle made with recycled glass. Naturally Occurring in Parts per Million: Calcium: 74.0; Magnesium: 7.3; Potassium: 1.0; Total Dissolved Solids: 220. 7.8 pH. We gladly provide additional consumer information related to water quality at www.mountainvalleyspring.com; 800.643.1501. Bottled at the original spring source, Garland County, Arkansas.