Pure. Fine. Est. 1871. 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 relating to water quality at: www.Mountainvalleyspring.com. 800.643.1501. 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. We actively protect over 2,000 acres of Ouachita forest, preserving the quality of our spring and vitality of the surrounding land. 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. This water's crisp and refreshing taste, alkalinity and unique mineral quality are the result of its 3,500 year natural filtration through the earth. NSF Certified. This bottle made with recycled glass. Safety sealed and ozonated for your protection. Bottled at the source in the Ouachita mountains. Bottled at the original spring source Garland County, Arkansas.