Three sewage treatment plants governed by Taipei City:
- Dihua Sewage Treatment Plant with the address of No. 235, Jiuquan St., Datong District, Taipei City, or the intersection of Sec. 4 Yanping N. Rd. and Jiuquan St. (Freeway: Exit Chongqing N. Rd. → Right turn at Jiuquan St.)
- Neihu Sewage Treatment Plant beside the Minquan Bridge No. 2, Sec. 2, Jiuzong Rd., Neihu District, Taipei City.