The "blood red" waters of the Leli River in Baise, South China's Guangxi Zhuang Autonomous Region, are again clean and clear after locating a workshop upstream as the source of the red dye that caused the abnormal color. There was no impact on the aquatic ecosystem with water indicators within normal range, said local authorities on Wednesday.

According to the Department of Ecology and Environment of the Guangxi Zhuang Autonomous Region, the "blood red" waters of the Leli River have gradually return to normality on Wednesday afternoon after the department detected and stopped the source of pollution, and used a flocculant to clear the river.

The local public security bureau has carried out an investigation on a man surnamed Ding, who is suspected of pouring the red dye into the river. Water quality testing showed that the amount of acute toxicity of organisms in the water body, chemical oxygen demand, heavy metals and other indicators are within normal range.

Local residents found some sections of the Leli River had turned red on Tuesday morning. The Department of Ecology and Environment took immediate actions after receiving the reports and has kept monitoring the river.