I have seen a few ponds I would neither swim or drink from, but a pond is like any other integral part of a farm or ranch, just like a pasture, livestock, fences and structures--you have to keep them up and in the case of ponds--healthy--and ya have to do your part to keep 'em that way. Unless there is some kind of mineral that dissolves in rainfall runoff that causes problems, or it was built in such a way that it rarely if ever gets any fresh influx of water, almost any pond can be made safe for cattle.
The dry hydrant is interesting for another reason. My homeowner's insurance is high because (among other things) I am several miles from the nearest fire hydrant. I could install a dry hydrant, and be 600' from one. I wonder if my ins co will accept that?
:tiphat: