Proud Source Water is naturally alkaline spring water with a crisp taste, bottled at the source in the USA and packaged in 100% infinitely recyclable aluminum bottles with a BPA-free liner. The water is naturally filtered through thousands of layers of rock, which imparts natural minerals and electrolytes without any additives. It has a pH of 7.8–8.5 and contains minerals like calcium, magnesium, and potassium.