The National Green Tribunal (NGT) has set up a committee to resolve the issue of sewage and toxic gas release from south Delhi’s Kushak drain.

The NGT was hearing a petition alleging violation of environmental norms in maintaining the Kushak stormwater drain near houses in B block of Greater Kailash-I.

The 6.5-kilometre-long Kushak drain carries stormwater and sewage from several south Delhi localities and meets the Barapullah drain near Nizamuddin West before flowing into the Yamuna river.

A bench of NGT Chairperson Justice A K Goel said the grievance needs to be remedied but the covering of a drain can be allowed only if a proper separate pipeline to carry sewage is provided and only rainwater is carried into the drain, which is not the case here.

“The applicants themselves have mentioned that covering the drain has resulted in the accumulation of poisonous gases (that are being) released from uncovered parts of the drain behind certain houses.

Thus, it may not be proper to permit the covering of the drain in these circumstances...,” said the bench, also comprising judicial member Justice Sudhir Agarwal and expert member A Senthil Vel.

“Channelising/treating and using sewage scientifically as per norms is the responsibility of statutory authorities like the Municipal Corporation and the Delhi Jal Board to effectuate the right of citizens to a clean environment,” the bench said.

It said the solution was to prevent the flow of sewage into the drain and its periodic cleaning, including desilting and ensuring that water does not stagnate.