The principal behind this concept is to combine the benefit of constructed wetland with another treatment technology so-called “groundwater percolation�. Generally, this system is applied as a polishing and reuse option so that parts of the pollutant will be treated during the infiltration and hence the groundwater will be recharged with treated and clean water. With this combination, the total land requirement for the overall treatment plant will be reduced as well as the polishing step can be integrated to the system without added cost and area.