To date less than 4 % of homes in Taiwan Province are connected to a sewage system, and domestic sewage is largely discharged directly into rivers. The dikes built along Taiwan's rivers not only hold back floods, but also the stench of their waters.
至今台灣汙水下水道只完成百分之四不到，家庭、工業廢水源源往河流排放，河川都蓋上堤防，不僅防洪，也達到了「防臭」效果。