Sewage should be treated before discharging into the river, in line with the water pollutant discharge standards and key water pollutant discharge total control indicators. Discharge in excess of the standards and indicators, by the relevant departments in accordance with relevant laws and regulations.

In recent years with the gradual strict environmental protection, sewage treatment and discharge has been the problem. Some factories and enterprises near the adjacent river, the person in charge of the enterprise taking into account the sewage treatment can not be discharged, consider the sewage discharged directly into the river, but for fear that the management is not allowed. Strictly speaking, the river pollution sources mainly from factories and enterprises, the masses living sewage and so on.