Delhi Silt Crisis: Drains Choked with Waste

As Delhi ramps up desilting operations ahead of the monsoon, a new environmental challenge has emerged: managing the vast quantities of silt extracted from city drains. This material, often contaminated with municipal waste, can no longer be disposed of using conventional methods, which have reached their saturation point.

The Irrigation and Flood Control (I&FC) Department has removed approximately 30.91 lakh metric tonnes of silt this year, a significant increase from the previous year. The Public Works Department (PWD) has also desilted nearly 90% of its targeted drain network. However, the sheer volume and contamination of the dredged material, particularly from mixed-flow drains carrying sewage, complicates handling and disposal.

With low-lying areas and landfill sites full, Delhi is exploring alternative disposal strategies. The I&FC Department has invited Expressions of Interest for legacy waste management and bio-mining solutions. These efforts aim to assess and develop scientific methods for processing and utilizing the silt, ensuring compliance with environmental regulations set by the Central Pollution Control Board and other agencies.