Where does the sodium come from?
In: Chemistry
Many waters with a pH <6.5 are acidic, soft, and corrosive. Thus, sodium compounds like sodium bicarbonate are added during water treatment in order to raise the pH of the water by chemically neutralizing the acidity as well as to soften the water
[source](https://www.google.com/url?sa=t&source=web&rct=j&url=https://waiakeasprings.com/blog/why-brands-are-adding-baking-soda-to-their-water-what-you-should-know-about-it/&ved=2ahUKEwiv7_WI0d7tAhUix1kKHfUKAf8QFjATegQIPhAF&usg=AOvVaw0mwyt-CusbhiREOsdodM1d)
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