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In a step to check pollution levels in the Yamuna, Delhi government said that it has undertaken a comprehensive interceptor sewer project to ensure that water from drains is treated before being discharged into the Yamuna. “Around 70 per cent of pollution in the river will be reduced with this project,” a statement issued by Lt-Governor Najeeb Jung’s office said. Assisting with the clean-up project, Delhi Jal Board (DJB) has prepared a Sewerage Master Plan 2031 and is in the process of laying sewerage systems in areas which do not have sewer lines. DJB will set up a 59-km-long interceptor sewer along three major drains (supplementary, Najafgarh and Shahdara) to intercept sewage from around 190 subsidiary small drains and transport it to the nearest sewage treatment plant (STP).This will ensure that only treated effluents are discharged into the drains.