OH brother do you have it WRONG
Every raindrop that forms does so by condensing onto microscopic
particles: dust, bacteria, viruses, etc. etc. etc. Without such
'nucleation sites' the water vapor would not 'condense'.
There are approximately 35000 particles (0,001 - 1.0uM) per cubic ft In
'pure' air.
The 'natural' pH of rainwater is slightly acidic to mildly acidic
(5-6pH)
Water that falls to earth and enters the underground aquifers does so
by perculation through the soils, sand, porous rock ..... which filters
the water !!!!!!!!! (but not the 'background' chemicals).
Rainwater direct from the sky should be filtered to 3uM to remove
fungal spores, (probably) 0,45uM to remove bacteria and bacterial
spores; but, can also use common chemical disinfection by adding
approx. 1 part per million of chlorine (from 5% clorox, etc.)



article . com, Mark
wrote:

2462 wrote:
There is no valid reason for believing that rainwater will be clean and
fit to drink.

Well, all water we drink was rainwater at one time or another, wasn't
it? Of course, once it's collected and stored, there's possibility of
biotic growth, so it should be disinfected. But, if you open your
mouth skyward when it's raining, I suspect it's as clean a water as you
can get.

Quote from rainwater.com:

"Rainwater is a renewable, sustainable and a high quality water source
for your home or cottage.

It is soft, neutral in pH, free from disinfection by-products, salts,
minerals, and other natural and man-made contaminants that cause
staining, pipe corrosion or smell. As well as being "nature's watering
agent" for gardening, disinfected rainwater is an excellent water
source for general household use - either on its own or as a
supplement.

Rainwater - IS IT SAFE? Absolutely -providing it is collected, stored
and disinfected correctly. Today, rainwater harvesting is popular in
parts of Europe, Hawaii, and Japan, and mandatory in places like
Bermuda, parts of Australia and New Zealand. There are over 250,000
known users in the United States, and a thriving rain collection
industry in Texas, Hawaii, Arizona, California and Oregon."