Beneath the whole Ozarks region, are massive deposits of limestone, hearkening back to the time in prehistory when this area was covered by ocean. While having the area submerged for several eons wreaked havoc with the local tourist industry of the time, it left us with one of the largest and best aquifers imaginable.
In hunting for land, we've come across some areas near major rivers where the water table can be, very deep, but for the most part, you'll find clean, clear water at a reasonable depth wherever you choose to drill.
Most of the modern wells being drilled on our properties seem to run from $5000 - $8,000 total cost. If you've picked a general vicinity where you want to buy land, the local well drillers can give you a more accurate estimation over the phone.