Local water supplies vary greatly.
One location limed the water to lower its ph level to 8 to keep the lead out
of the drinking water.
Most of the water in the area was 5.0 to 6.5 ph.
Some areas have water so hard the calcium deposits in a cleaner would shut
it down in a few months.
I would use New York City water for a final rinse, there are few areas with
water that good.
Analyse the water and determine what is required to reach your cleanliness
requirements.

That 20M water drops to under a Meg as soon as it is in contact with the
air.


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