Yes the majority of women won't see things as many men might.
In a rock bore well, as opposed to a fuly cased and screened sand and gravel aquafer well, water quality can vary greatly from one well to the next only 100+' away. It's due to the geology the well goes down through.
In addition to that, there are different types of equipment and ways to treat different causes of poor quality if the problem is such that more than a softener is needed. But the quality of the treated water is usually about the same.
Gary Slusser