>> coleman flowers: yes.at it, it looks like play-doh. >> whitaker: the dense soil can't absorb liquids drained from septic tanks, causing waste to pool in yards and back up into homes. charlie mae and willie holcombe say raw sewage has flooded their property for the last 30 years. >> charlie mae holcombe: all these years we've been here, my kids have never-- name a year-- been able to go out there and play in the yard. and even when it wasn't flooded, let me tell you something-- the ground stays so soft, you could walk out there and, like, you sinking. >> whitaker: it's mushy? >> charlie mae holcombe: yes, it's mud and waste. >> whitaker: the retired couple live on a fixed income in hayneville, the county seat. incredibly, they pay monthly swage fees to have waste from their septic tank empty into this municipal lagoon, roughly eight football fields of sewage. so, where's the lagoon? >> willie james holcombe: the lagoon's across the road over there. >> charlie mae holcombe: right behind those houses right th