Gurugram, Jan. 13 -- The Municipal Corporation of Gurugram (MCG) has been pulled up by the Haryana Urban Local Bodies Department over alleged negligence in maintaining the city's sewerage infrastructure and wastewater treatment systems, with the issue reaching the Union ministry of home affairs amid concerns over untreated sewage flowing into drains linked to the Yamuna basin. Senior officials said the Centre's intervention follows sustained complaints about untreated sewage entering stormwater drains and water bodies, an issue also under close scrutiny of the National Green Tribunal (NGT). The state government has warned that cosmetic compliance will not be accepted and visible, on-ground improvements must be demonstrated. Officials said the trigger for action was repeated NGT observations that Gurugram continues to discharge large volumes of untreated sewage into stormwater drains through illegal sewer-drain interlinking and poorly performing or non-functional micro sewage treatment plants (STPs). During a recent high-level review meeting, urban local bodies department officials reprimanded MCG officers for failing to curb illegal sewer connections and ensure functioning of micro STPs. Responding, Haryana Urban Local Bodies Minister Vipul Goel said, "Every micro STP in Gurugram will be physically verified and audited. There will be no compromise on sewage management." About five years ago, MCG installed 41 micro STPs at a cost of around Rs.75 crore across parks and residential colonies, said Ravinder Yadav, additional commissioner, MCG. "We are already checking the STPs and will ensure they are functional at the earliest," he said. Intended for local sewage treatment and reuse for horticulture, over half are non-functional or technically defective, officials admitted. Cabinet minister Rao Narbir Singh earlier said, "Untreated sewage entering rivers and lakes is not just an environmental violation but a serious public health risk." MCG has sought a detailed status report on all 41 plants, covering operational condition, maintenance expenditure and reasons for prolonged shutdowns, and is examining whether funds were utilised as per norms. MCG has launched a citywide survey from January 5 using GPS mapping to identify sewage discharge hotspots. Illegal discharge detected in Sector 42 by GMDA is being treated as a model case. Officials highlighted large-scale illegal sewer-stormwater interlinking, violating Central Public Health and Environmental Engineering Organisation guidelines. Such connections cause monsoon backflow, waterlogging, foul odour and surface water contamination. Meanwhile, Gurugram, Faridabad, Manesar and three other municipal corporations have also been directed to disconnect these links. Industries have been warned that non-functional STPs or failure to reuse treated water will attract penalties....