Yamuna Clean up and Urban Water Governance

Context

The Union Home Minister announced a timeline for cleaning the Yamuna in Delhi, along with plans for associated infrastructure development. The proposed improvements need to be assessed in terms of sewage treatment, untreated drainage, ecological flow requirements and the capacity to deliver results. The success of river cleaning initiatives should be measured through actual water quality improvements rather than merely the amount of money spent on projects.

Key Highlights

• The announced projects involve an estimated expenditure of ₹8,941 crore, with a target of achieving improvements by May 2029.
• Yamuna pollution is caused by multiple factors, including inadequately treated sewage, industrial wastewater discharge, drains and insufficient river flow during the dry season.
• Effective river restoration requires coordination between Delhi’s administrative agencies and the upstream and downstream States.
• Infrastructure development alone cannot ensure river rejuvenation. Proper operation, regular maintenance and measurable improvements in water quality are equally important.

Key Concepts

• Biochemical Oxygen Demand (BOD): The quantity of dissolved oxygen required by microorganisms to decompose biodegradable organic matter present in water. A high BOD level generally indicates substantial organic pollution and can reduce oxygen availability for aquatic organisms.
• Dissolved Oxygen (DO): The amount of oxygen present in water that is available for aquatic organisms. Low dissolved oxygen levels can indicate ecological stress and threaten aquatic life.
• Sewage Treatment Plant (STP): A facility designed to remove contaminants from wastewater before it is discharged into water bodies or reused. The actual functioning and utilisation of treatment capacity may differ from the installed capacity.
• Environmental Flow (E-flow): The quantity, quality and seasonal distribution of water required to sustain river ecosystems and the ecological services they provide.
• Water (Prevention and Control of Pollution) Act, 1974: The principal legislative framework for preventing and controlling water pollution through Pollution Control Boards and regulation of wastewater discharge.
• Urban Water Governance: An integrated approach to managing urban water resources through coordinated planning of sewage networks, drainage systems, groundwater, water reuse, solid waste and river basin management, instead of treating each component separately.

Way Forward

• Ensure independent monitoring and publication of reach wise data on BOD, dissolved oxygen and faecal coliform levels to assess river health.
• Address gaps in sewage collection networks and strengthen the monitoring of industrial wastewater discharge.
• Allocate adequate funds for infrastructure maintenance and the reuse of treated wastewater, rather than concentrating exclusively on new construction.
• Promote coordination among different administrative jurisdictions to manage river flows and pollution across the entire basin.