The water mining concept involves choosing an area where water is needed, extracting waste water from an underground sewer, treating it to a high standard and then recycling it for local use. The solids separated from the waste water are returned to the sewer, and move on for efficient treatment at the main waste water treatment plant. The major benefit of water mining is that water does not have to be brought back from larger treatment plants to the area in need, which means money does not have to be invested in large underground pipe systems. The concept has the potential to be used in many public parks and gardens.