Abstract: Most of water we used as rinse water, for example water used for bathing, for washing hands, to wash clothes, and more, approximately 70-80% of water consumption will turn into gray water. Along with the increasing water demand, the raw water needs to be processed is increasing as well. However, the increasing need for raw water is not followed by an increase in raw water, both in quality and quantity. These conditions encourage efforts to find alternative sources of raw water which more secure than others in terms of quality and quantity. One of its efforts is by making use again (reuse) efluent from wastewater treatment. The technology will be used to process must be cheap, effective, and not difficult in treatment. Technology used in this study is constructed wetland. The purpose of this research is measuring the treatment efficiency, determining the optimum operating conditions, determining the criteria for water reuse. This research is conducted in the laboratory using a constructed wetland with type of plant is Typha latifolia. Variations are made in this study are detention time (1day, 3days amd 5 days) and type of reactors (constructed wetland & aerated constructed weland). Each reactor is given wastewater feed derived from effluent of WWTP Bojongsoang. Parameters examined in this study are COD, BOD, pH, and temperature. Measurement of COD, pH, and temperature conducted every day, while the BOD parameter are done after the reactor reaching steady state conditions. Based on the measurements, it is known that the best detention time to remove organic matter is at 5 days with efficiency between 91,2-94,9%. Aerated constructed wetland can remove organic matter better than non-aerated reactor, with good significance removal at 1 day detention time.