Your comment: Very nicely put Moreless, but rainwater has much more in it than distilled water:
From one of my posts in water debate forum (with an edit):
“I would also like to point out to you that rainwater is really not like distilled water at all! It appears that raindrops do carry a trace amount of minerals (see study below); also I suspect that the fall from the clouds through the air has an effect on the rainwater’s molecular structure and as it passes through the oxygenated atmosphere, sunlight and the magnetic field it is transformed in a way that distilled water cannot compare to!
Studies of the chemical composition of rainfall have been carried on for many years starting in late 1880s in the United States and in Europe. Rainwater collected in various parts of the USA contains (in milligrams per liter): Fe (0.015) , Ca (0.075-1.41), Mg (0.027-1.2), Na (0.22-9.4), Ca (0.075-1.41), K (0.072-0.11), HCO3 (4-7), SO4 0.7-7.6), Cl (0.22-17), NO2 (0.02), NO3 (0.02-0.62), and Total Dissolved Solids 8.2-38), and pH of 4.9 to 6.4.”
Answer: I agree that rain water is not distilled water !
The point I was making was that the rain water before mankind started polluting the environment would have been closer to distilled water than the water from , say a spring or underground water supply , which was in a mineral rock formation !
So, the question may be asked where would have folks years ago in Nature gotten distilled water !
Of course the answer would be that they would not have gotten distilled water, but the rain water may have been as close as they may have come to getting water, which may be considered soft water(Lacking in a high amount of Minerals) !
If you will check your research, you may find that generally rain water , even now days may be considered as a softer water, than water from a ground source pulled from a rock formation ?
And the rain water will generally contain Less Minerals than the ground water ?
But, in todays society around the Large polluted cities and industry, it may be hard to find a good source for Clean water, and under these conditions, if I was in this condition, I would use Distilled water if it was a choice of distilled water vs the regular city water !