Little known fact: Some bottled water companied simply take tap water from their local water source (municipal or otherwise), “filter” it, and bottle it. Always read the labels on the outsides of the bottles to see where the water really came from — especially if you find yourself buying an ‘off-brand’ of bottled water.
Some of the items we found in our impromptu testing of various bottled water products included nitrates, nitrites and trace levels of heavy metals. While none of the levels exceeded Primary Drinking Water Standards, it did cause us to scratch our heads and say, “Weren’t these things supposed to get removed at the bottling plant?”
So in conclusion, we suggest learning as much as you can about the water you drink whether it comes from the tap, from the ground, or from a plastic bottle with a ‘pristine-looking’ label.