Overview
- The utility has issued a tender to install flow meters and track discharge along the 22-kilometre Wazirabad–Okhla reach, the river’s most polluted stretch.
- The study will quantify inputs to major conduits including the Najafgarh, Shahdara and Supplementary drains, plus about 13 interstate drains from Haryana and Uttar Pradesh.
- Officials now estimate the Najafgarh drain carries roughly 800 million gallons per day of untreated sewage, up from an earlier 600 MGD.
- In letters to neighbouring states, the DJB urged source control of inflows, citing 187 MGD from Haryana into Najafgarh, about 105 MGD from Badshahpur and the Kundli industrial area, and around 105 MGD of untreated waste entering the Shahdara drain from Uttar Pradesh.
- Delhi says treatment capacity has risen from 694 MGD to 814 MGD, with bidding underway to reach about 1,060 MGD by December 2027 alongside drives to connect households to sewerage.