Posted by 2underage on October 20, 2014 at 06:56:30 from (64.19.81.2):
In Reply to: Water Quality posted by Traditional Farmer on October 20, 2014 at 05:08:17:
Having drilled a few hundred water wells I feel that I should reply. First, water well depth can vary all over the place in any location with some exceptions. Drilling in rock formations will lead to the widest variation of depth because ground water in rock is stored in cracks that often run from near the surface to much greater depths and this is why one well will be very deep and another quite shallow. To picture this I draw a line from the top of a sheet of paper and angle it [45degree or so] toward the bottom. If this pictures the water-bearing crack one can see that a well drilled at the top will be much shallower that one drilled into the water bearing crack at the bottom.
Exceptions are when the water source is in a sand or gravel aquifer . All wells drilled in this water source will be about the same depth.
Hand dug wells or surface wells were the original water sources for homes and businesses in the early days and even today in many third world countries. Because they are often recharged by surface water run-off they can be highly polluted and not safe to drink. I say this in general terms because this pollution problem does not always exist or the water can be treated to be safe.
I find it to be generally true that deeper wells will have the hardest water. Most likely do to more exposure to mineral sources.
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