Industrial wastewater regulations in India have become significantly stricter in 2025, requiring factories to meet evolving CPCB and SPCB compliance standards. This guide explains the latest wastewater discharge norms, key parameters such as BOD, COD, TSS, pH, heavy metals, nitrogen, and phosphorus, and outlines important regulatory changes including mandatory Online Continuous Effluent Monitoring Systems (OCEMS), expanded Zero Liquid Discharge (ZLD) requirements, separation of industrial and domestic wastewater streams, and annual Form V submissions. Learn how manufacturers can maintain environmental compliance, avoid penalties, and ensure their wastewater treatment systems meet current regulatory expectations.