We have only owned our home for 3 years. We moved in after the house was empty for almost 2 years. The septic system is only 8 years old. Two months after we moved in we started have effluent coming to the surface of our back yard. We dug up straight lines from tank and found one not attached to chamber. We fixed that and about a month after that same problem began. We had a drought in the area I live a couple summers ago, during this drought we had no effluent coming to surface of ground, it totally dried up. When it rains is when we notice water on ground. We had tank inspected and pumped and no cracks or leaks. We have 5 leach lines and only two last ones are working(kindof). When water fills up last two lines we begin to have water on top of ground. My yard is the lowest in neighborhood. Everyone on opposite side of road from me have wells for their water. At this time, like most homeowners, we cannot afford to replace our entire leach field. Could it be ground water or water from the aquafirs from the neighborhood wells. Does anyone have any ideas as to what the problem could be or a easy or cheaper way to fix the problem.