For all milleniums that humans has been drinking water they has first of all been drinking surface water, means rain water or melted snow or ice. The human body has been adapted to this kind of ultra pure water through thousands of years.
When the natural water system on earth delivers water from heaven as rain or snow it has been purified to be absolute pure containing zerro minerals and no other contaminants.. To get the correct picture of what drinking water should be for humans it is important to understand the full scope of the water cyclus on our planet.

The Water Cyclus works as explained here:
All drinking water on earth has been distilled from the oceans, lakes, rivers and streams as well as from landsurfaces and the plants through evaporation caused by the infrared light from the sun that causes a distillation process.. The light from the sun consist from 50% from Infra Red light that switches between beeing Light to convert to Heat and from Heat to beeing Light. The other important component in the Sun Light is The UltraViolet light, this light provides biologically safe drinking water that is desinfected.
When the water reaches the Sky it is totally pure and safe, in this vapor form it is condensed by a cooling process where it forms drops of rain that then will :be so heavy that it fals as rain if the temperature in the athmosphere is warm and as snow if the athmosphere air is colder or even below the freezing point

The pollution start the moment water or snow hits the ground
Due to the fact that water is the strongest solvent on our planet the water starts to dissolve both inorganics minerals from the rocks and the soil as well as organic matter from living or dead plant and animal species. Water has a very complex composition consisting from 18 differnt molecules that are composed from 30 negative ions and 12 positive ions. The water is than divided in 4 different phases known as Liquid, Vapor , Ice and EZ water/Gel these different phases can further be divided in an infenite number of structures giving the water unenden numbers of characteristics and properties. The latest scientific discoveries suggest that water is a living organism that influences every aspect of life and living cells tenthousands of processes ongoing every second in all other living species of life. .The number of structures can be observed in frozen species of structured watermolecules that are frozen to snowflakes. After studying snowflakes every day for 40 years one scientist has still not found 2 snowflakes that are 100% equal.

What happens when water precipitate the surface of the Earth
During precipitation of the surface of the Earth crust that is up to 50 miles thick the water dissolve all known solid matters and can be polluted with all kinds of minerals and mineral salts, further it can absorp all types of gassses. It becomes very clear that water is the blood of the earth that can transfer, cleanse and supply all physicals matters in the biosphere on Earth.. Normally mankind did from the beginning not have access to groundwater other than springs formed by melting water from higher altitudes. At first mankind never was demanded to dig for water as it was abundant on the surface in lakes, rivers and smaller streams. The water was accessible direct on the surface and the water was microbiologically safe through the disinfection by the UltraViolet Light and now we know even structures as EZ water on all surfaces by the Infrared Light.

Summary:
Upp to now everything was working well before mankind started its pollution of the Earth. In the comming articles we will explore how mankind is influenzing the environment and the Effects on Human Health and Life Quality.