What is the healthiest water to drink in the world?

Could you please elaborate on the concept of "the healthiest water to drink in the world"? Is there a specific type of water that stands out in terms of nutritional value or purity? Are there any scientific studies supporting the claim of certain waters being healthier than others? Additionally, how does the source of water, such as spring water, tap water, or bottled water, factor into this discussion? Could you also discuss any potential contaminants or additives that could affect the healthfulness of drinking water? Finally, are there any recommendations you would give for choosing the healthiest water to consume?