as far as well water goes...what kind of well...i had a natural aquifer that had a runoff from it...came from 250 some odd feet down, pure naturaly filtered water....the plants LOVED it! at the end, my girls were almost 6 1/2 feet tall...that water was awesome..didnt use nothing but that water and soil from a horse pasture...threw in some earth worms and wow...sorry for the rant...
...my point is this..if its a natural well good, if its a piped well test it...