Neighbor grey water ingress

Blocked drainage and and a makeshift surface dug drain is directing greywater from the adjacent property at the rear of KH to the rock retaining wall. Overflow is consistently cascading down the rock retaining wall into the KH boundary v drain. The grey water is raw from general washing and kitchen so is unhygienic. It also contributes to the ground water runoff build up behind the retaining wall that could eventually compromise its structure and start to break up.. Category: Plumbing/Drainage. Area: Site / Perimeter