China Industrial Wastewater Discharge Standard Limits

ENFORCEMENT TIMELINE

Compliant with national and local standards (GB)

Enforcement: Compliant with national and local standards (GB)

Overview

These are the maximum permissible discharge concentration limits (mg/L) for chemical oxygen demand (COD), ammonia nitrogen, phosphorus, and heavy metals (lead, total chromium, etc.) contained in industrial wastewater across sectors such as chemicals, textiles, and electroplating.

Enforcement Timeline

- 2025: Stricter supplementary discharge standards (local standards) applied to factories near certain priority watersheds.

Business Impact

These limits directly inform the design of wastewater treatment capacity at company-owned plants and are reflected in water-quality measurement record-keeping.