Natural. Pure. Fine. We gladly provide additional consumer information relating to water quality at: www.mountainvalleyspring.com; 800.643.1501. NSF certified. The Mountain Valley Spring is a source of wonder, inspiration and crisp, pure American spring water. Flowing fresh from the heart of the Ouachita Mountains, this natural, untamed source inspires our devotion to America's pristine wilderness; from lush, vibrant forests to soaring mountains. The Mountain Valley water has been recognized and rewarded across the country for its crisp, refreshing taste and exceptional quality. Bottled at the original spring since 1871, The Mountain Valley is America's source for pure and natural spring water. Naturally Occurring in Parts per Million: Calcium 74.0; Magnesium 7.3; Potassium 1.0; Total Dissolved Solids 220. 7.8 pH. Please recycle. Bottled at the source in the Ouachita Mountains USA. Bottled at the original spring source Garland County, Arkansas.