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NGT questions Haryana on drain contamination
10 Dec, 2025
Summary
- Sewage from Haryana's DD-6 is spilling into DD-8, a key drinking water source.
- The National Green Tribunal is investigating the contamination risk to Delhi's water.
- A breach in a separation wall between drains caused the critical mixing of waste.
The National Green Tribunal (NGT) is scrutinizing potential contamination of a crucial drain supplying drinking water to Delhi. Concerns have surfaced regarding sewage from Haryana's Diversion Drain No. 6 (DD-6) spilling into Diversion Drain No. 8 (DD-8), a vital freshwater source for the capital. This potential pollution poses a significant environmental and public health threat.
The tribunal learned that DD-6 receives substantial sewage, and despite existing treatment capacities, untreated waste continues to enter the drains. A recent report confirmed that DD-8 is indeed a freshwater drain, while DD-6 is not. The critical issue was a breach in the separation wall between the two drains downstream of Akbarpur Barota, allowing effluent to mix.
While Haryana officials have stated that the breach has been repaired, the NGT remains vigilant, having previously directed long-term remedial measures. The tribunal has scheduled a follow-up hearing for February 20, 2026, to further address the ongoing matter and ensure the integrity of Delhi's water supply.
