What are the white flakes in bottled water?

Sometimes during colder months when water freezes, rapid changes in temperature can cause the calcium minerals to separate from the water, bond together and precipitate, or turn into a solid form. When the water thaws, the calcium stays in its solid form and may appear as white pieces or flakes floating in the water. If you’ve ever encountered this phenomenon, you’ve experienced science in action. So, if you see white particles floating in your favorite bottle of all-natural spring water, don’t be alarmed. The white flakes are naturally occurring calcium particles.