Passive water treatment system through wetlands is the most common way to treat mine water before discharges into natural water. Before water get into the system, the water get oxigenated then flow into collection ponds where the iron settle at the bottom of the pond. The water then exit the collection pond into the aerobic wetlands to further clarify the water by removing the rest of the iron particle. At the end of the wetland where water is ready to be discharge into natural water source, the area also work as a park to be use as public space. The water then pumped into water treatment facility(3).