This dataset represents the treatment of wastewater generated by general transformation activities. The average COD content of domestic sewage in Wuhai City, Inner Mongolia Autonomous Region is 0.3031 kg/m3, and the BOD is 0.1178 kg/m3. The wastewater treatment process shares in this region are: Carrousel oxidation ditch 77.05%, BIOLAK 17.11%, A²/O 5.84%.