Hi, like most of the ...

Hi, like most of the responses on this question.  I am also of the same opinion.  Human taste is the ultimate deciding factor for potable water concerns.  Well water may be low brackish, mid brackish or even high brackish.  So first you need to establish, only one parameter and that is the TDS profile.  Suggest to get data of the region (a bit difficult) or do a high level sampling for every season (3 - 4 months) and when there is a change in season (like early monsoon, mid monsoon, peak summer and peak winter). For cost economy point of view, only TDS should be done for inorganic constituents and for organic, since it is a well, try for fe, Mn etc. This will give you a pilot treatment scheme.  Pick from here.  It is a lengthy process, but if done correctly will save you hidden costs and challenges for the future.