When you have a well you should have it tested regularly, we never do,so I use distilled water for drinking water in which I drop some Concentrace mineral drops. We have a lot of iron so we need a softener. It has also traces of radon and arsenic. It depends in which part of town you live, because some areas need an arsenic removal system. The iron is so bad that we even have the outdoor faucets running through the water conditioning system.