"DannyD." wrote:

How many of 'em are there?

There are about 50 neighbors in the neighborhood, but, of course,
not everyone will be willing to pitch in. Just those with the
shallower wells (less than about 500 feet or so deep).

Regardless how many of them cooperate in a bulk water purchase, where
are each of them going to store the water?

Presumably if you normally have well water, you won't necessarily need
or have a storage tank along the lines of a few hundred gallons if the
water is (or was) always available.