1. Sediment sewage: Generally, sand washing will produce a lot of sediment sewage, which contains a lot of suspended solids and pollutants. If it is directly discharged into rivers or lakes without treatment, it will cause serious pollution to the environment.

2. Noise pollution: Large-scale mechanical equipment, such as crushers and conveyor belts, are usually used to wash sand fields, which will produce great noise when working and affect the lives of surrounding residents.

3. Air pollution: A large amount of dust and waste gas will be generated during sand washing production. If it is directly discharged into the air without treatment, it will affect the air quality and endanger the health of the surrounding residents.