The Delhi Jal Board plans to lay an 8.34-km sewer rising main through the Yamuna's floodplain to carry sewage from the Ring Road pumping station to the Okhla sewage treatment plant, Hindustan Times reported.
The DJB board has given administrative approval for an estimated cost of ₹148.90 crore for the 1,800mm-diameter pipeline. Bids dated October 26 have been invited for the work, valued at about ₹140.04 crore, with a completion period of a year and a half, according to the report.
The problem it targets
The DJB says the new line will address recurring sewage overflows caused by three gravity ducts built in 1938, 1972 and 1992, which have aged, silted up and become inadequate.
"The project is intended to convey sewage directly to the 124-million-gallon-a-day Okhla STP, reducing the load on the existing ducts and minimising overflows and foul conditions in the Sriniwaspuri, Kalkaji, NFC and Captain Gaur Marg areas, particularly during the monsoon," officials told the newspaper.
The objection
The route is the difficulty. Hindustan Times reported that the Delhi Development Authority's draft Master Plan 2041 says no permanent construction should be permitted on the floodplain, and that excavation, access roads and soil dumping would need scrutiny. The report did not say how the DJB plans to protect the floodplain during the work.
Bhim Singh Rawat, a Yamuna activist with the South Asia Network on Dams, Rivers and People, said no further construction should be allowed on floodplains that have already been heavily encroached. "We keep targeting floodplains with projects like riverfront, flood wall, sewer lines which harm the river ecosystem in long run," he said.
Why it matters
The pipeline sits inside a wider shortfall. Citing a February 2025 Yamuna rejuvenation report, The Patriot reported that Delhi generates about 792 million gallons of sewage a day, against 764 MGD of installed treatment capacity and only 611 MGD actually treated.
This is also not the first dispute over DJB work on the floodplain. The Patriot reported environmentalists' objections last year to a plan for treatment plants at the mouths of major drains, with Rawat warning then that such structures would encroach on the floodplain and be exposed to flood damage.
The DJB's case is that the line will cut overflows in the areas it names. The open question is how it will be built on the floodplain.
