The area of the planned wastewater catch basin is 35.09 ha.  Total catch basin area will be 69.36 ha. if the area outside of the planned one is taken into consideration.  The population in the planned area is estimated at 9,900 in the target year.  If those outside of the planned area is counted in, total population will be 21,242.  Average day wastewater flowrate is about 6,543 CMD.  The receiving water body of the planned sewerage system in the preliminary stage is Kwei-tsi-Keng Creek.  In the long run, effluent will be discharged to Pa-li WWTP and outfall to the Taiwan Strait.  Branch sewers are installed along major roads in the area.  The collected wastewater is sent to Taipei suburban sewerage system via subtrunk and main trunk pipelines.