My neighbor had a septic tank put in after the well was put in. The septic and leach field run toward the mountains behind the house and away from the house and the well is in line with the front of the house. There is not much difference in grade but there is run off from the mountain area that runs past the septic toward the well. The septic was inspected by the powers that be but to me it seems like a poor arrangement with the natural direction of run off and possibly the underground flow of water going from the septic to the well. Not sure how to phrase the question here except: Is there something wrong with that setup? The house wasn't finished and I don't think they used the toilet in there very much. They stayed in a shed that was smaller to heat since they were only here in the winter.