At the same time tap water is being polluted with all kinds of chemicals.
Some, such as chlorine, are added to sanitize the water and avoid outbreaks of infectious disease but also sanitize and damage our guts.
Other chemicals, such as those from industrial operations, find their way into the water supply and should be avoided.
People are aware of this problem and probably that is why bottled water sales are up.
However, bottled water is more difficult to obtain and is not necessarily pure.
Filtering water at home is way easier and is just as (or even more) healthier than buying bottled water.