The clearest water – distilled. It is wrong to believe that it is rain water. Drops of a rain contain dust and dioxide of sulfur which they absorb from air.
The distilled water is an oxygen and hydrogen in pure form. Rain water cannot be compared to it on purity as as a result of air pollution from cars and factories of a drop of a rain when falling down again incorporate impurity. Water from under the crane contains huge amount of hazardous substances, and water which is sold in bottles in shops, on purity differs from water a little.
How to purify water
To avoid the problems connected with water pollution it is better to buy a distiller. It can be filled with any water including from under the crane. The device will slowly heat water until it evaporates. Water will rise in a special compartment. There it will be cooled, being condensed back in water and flowing down in the separate collection for the distilled water. All dirt, chemicals and bacteria which were in water initially will remain at the bottom of a distiller, and only clear water will evaporate. The distiller works by the same principle, as wildlife. Water evaporates and, rising to the sky, turns into clouds. Then, being cooled, it becomes a rain and falls to the ground. Though the distiller is not cheap, consider what economy you will achieve, using it. Buying water in shop, every time should be paid for it. And, having bought a distiller once, everything what you will pay for - it is water from under the crane and electricity.
It is better to store the distilled water in glasswares because plastic bottles spoil taste of water.
Spring water
When it is raining, the huge amount of water gets to streams, the rivers, lakes and oceans, turning into a surface water. But some amount of water gets deep into lands, becoming underground waters. Underground waters get more and more deeply into the earth and pass through the organic filter consisting of dirt, sand, rocky breeds. The come-back on a surface streams, such water – usually the cleanest in the world. It can be drunk directly from a source.
The main environmental problem of the present is environmental pollution which affects water quality. But water which was in the earth for years, decades and, maybe, centuries did not manage to become soiled.
Usually the sources which are in public places check for water quality. But as for more secluded springs, they should be checked for purity before drinking from them water. Always there is a probability of pollution of springs from human activity. If with water everything is all right, it is possible to take safely it from a source. So you will save money and keep health. It is again better to store such water in glass bottles.