I have a friend with a septic tank, the system is old, probably long overdue for some kind of serious maintenance or replacement that they've been putting off because the town is doing some big expansion of the sewer lines and their street is supposed to be on the list for it and they intend to get hooked up to it, but no one seems to know quite when that's coming. Their property also generally has some weird drainage issues and is sort of in a semi-wetland area, so their septic tank sometimes has a hard time dealing with things when we get a lot of rain, so they have to have a let it mellow policy sometimes depending on the weather. Most of the time the guys will just opt to go find a tree in the back yard.