Do drains in the house empty slowly or not at all?

Are there any wet, smelly spots into the yard or foliage?

Does sewage back up into the house through drain lines?

Does the dishwasher or laundry drain into the yard or a "dry well"?

Is the septic tank effluent piped so it drains to a road ditch, a storm sewer, a stream, or is it connected to a farm drain tile?