Alkaline 8.5 +/- pH. Vegan. Naturally Occurring Minerals & Electrolytes mg/L: Calcium; 42 mg/L, Bicarbonate; 145 mg/L, Magnesium; 6.8 mg/L, Chlorides; 4.6 mg/L, Potassium; 1 mg/L, Tds; 166.8 mg/L, Silica; 12 mg/L, pH; 8.1-8.5 mg/L. Crafted by Nature: Our natural alkaline spring water is bottled at the source near the base of idaho's majestic Mount McCaleb. It's naturally filtered by thousands of layers of ancient volcanic rock, leaving minerals and electrolytes that deliver a smooth, crisp taste. Support small-town USA. Naturally filtered, no additives. Fund outdoor cleanups. NSF. proudsourcewater.com. For questions, information or a report on water quality contact: 1-855-H2-PR-0-UD or proudsourcewater.com. Certified B Corporation. BPA-free liner. Bottled for Nature: Ending single-use plastic is just the beginning, at Proud Source we hold ourselves accountable to the earth in all aspects of our craft - from our infinitely recyclable bottle to our sustainable sourcing methods. It's a choice today for tomorrow, discover what makes us so proud at proudsourcewater.com. Infinitely recyclable. Bottled at the source Rocky Mountains Mackay, Idaho. Bottled at the source Mackay Springs Custer County, ID.