How many sewage treatment plants does the city of Xi'an have 2022

25 seats. As of February 2022, the city of Xi'an*** has 25 sewage treatment plants, of which 24 can be used for secondary and tertiary treatment, with 3080.57 kilometers of sewage pipelines, a daily sewage treatment capacity of 2,368,000 cubic meters, and an annual*** treatment of 74,971,000 cubic meters of sewage.