The latest comprehensive sewage discharge standards in 2022

The latest comprehensive sewage discharge standards in 2022 are as follows:

1. Discharge into GB3838 Class III waters (except for designated protected areas and swimming areas) and discharge into GB3097 Class II waters The sewage discharged into Class IV and V waters in GB 3838 and the Class III sea areas in GB 3097 shall be subject to Class II standards;

3. Sewage discharged into urban drainage systems with secondary sewage treatment plants shall comply with Level 3 standards;

4. Wastewater discharged into GB3838 Class III waters (except for delineated protected areas and swimming areas) shall comply with Level 1 standards Standard (Class III waters: mainly suitable for secondary protection areas of centralized drinking water surface water sources, fish and shrimp wintering grounds, migration channels, aquaculture areas and other fishery waters and swimming areas);

5 , discharge into GB3838 Class VI and Class V waters shall comply with the secondary standards (Class VI waters are mainly suitable for general industrial water and recreational water areas with indirect human contact, and Class V waters are mainly suitable for agricultural water areas and waters with general landscape requirements);

6. The sewage discharged into the urban drainage system with a secondary sewage treatment plant shall comply with the third-level standard.