The National Green Tribunal (NGT) has directed the Central Pollution Control Board (CPCB) and the local pollution watchdogs in Delhi, Uttar Pradesh, Haryana, and Bihar to ensure that all industrial units that do not adhere to norms immediately install Online Continuous Effluent Monitoring Systems (OCEMS). These real-time devices track the quality of industrial wastewater discharged into rivers such as the Ganga and Yamuna.

The order was passed on November 4 after the tribunal noted large-scale violations by industrial units releasing untreated effluents into crucial water bodies.

The bench was hearing a plea that alleged several Grossly Polluting Industries (GPIs) units that generate more than 100 kg/day of Biochemical Oxygen Demand (BOD) or discharge over 25 kilolitres of wastewater dai

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