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M Q

wrote:
....
Hello, I have a residence with a deep water well. This well is
exactly
200' deep and water is at around the 175' level. The pump is located
about 4' off of the bottom with approximately 20' of water above it.
The well is 12" inside diameter steel cased. I checked with the
county
and they do not have any record of the well so it is probably 40
years
old or more. This well produces anywhere from 1 gpm to 7 gpm and the
rate does not seem to matter if we are having a wet or dry season. I
am curious if there is any consensus from people on this newsgroup if
I should try to improve this well or have another one put in.
Currently, the production is adequate, but just barely. The well is
located in the hills in central California. Thanks for suggestions.

....
I have been owned this home for 4 years and it has always produced
between 1 and 7 gpm. The depth to water has remained pretty constant.
It varies 3 or 4 feet throughout the year.

How much water do you need?
There are a lot of things about your local geology / hydrology
that we don't know. In some areas the water table may vary almost
not all all from year to year or seasonally. In others it may
vary a lot. Of course, when the water table goes below the
level of the pump your yield goes to zero.

You don't say whether you use a storage tank, or whether your
definition of adequacy is based on the instantaneous yield vs.
consumption or averaged over a day or so. If you are not using
a storage tank and the well
is just barely adequate, then the well will probably be adequate
with a tank, as long as the water table does not drop.