As I haven't been able to find a property with a large enough pond, I'm starting to think more and more about just buying land and building my own. I'd prefer to build my own anyhow, but I'm a bit paranoid about soil quality and water sources. The last thing I'd want to do is buy a piece of land, then get out and find that I can't even build a pond because the soil doesn't have enough clay content.

But as long as the soil would hold water...and I wouldn't have to look at a liner for a 5-10 acre pond, I wouldn't have a problem adding a well to keep the pond filled.

But what kind of issues (pH, Alkalinity, oxygen, etc) are there with using mainly/strictly ground water for filling and maintaining the water levels?