A worker shows journalists a sample glass of water after being dealt with at the sewage treatment plant in Huangyuan county, Xining, on June 19, 2019. [Photo provided to chinadaily.com.cn]

More sewage treatment plants

Statistics from Qinghai's ecology and environment department show the province has built 52 sewage treatment plants in total, covering all counties.

For example, the sewage treatment plant at Huangyuan county, Xining city, has been making contributions to the treatment of domestic sewage of more than 1.3 million local residents since its establishment in 2009.

After further upgrading facilities and technology in 2018, the plant now processes 8,000 to 12,000 tons of water per day, according to Li Xin, a project manager at the plant.