Yamuna River: Ammonia and Microplastic Pollution Concerns
Why in news?
A December 2025 TERI study highlights high levels of surfactants from detergents, ammonia, and microplastics in the Delhi stretch of the Yamuna River, identifying hotspots from untreated sewage, industrial effluents, and solid waste that cause frothing, especially in winter when flows dip.
Sources and Extent of Pollution
- Untreated Sewage: A major contributor to the Yamuna's pollution is the discharge of a large volume of untreated domestic sewage. In Delhi alone, approximately 238 million gallons of untreated sewage enter the river daily. This sewage carries harmful chemicals and pollutants.
- Industrial Effluents: Various industries release effluents into the river, further degrading water quality.
- Solid Waste: The riverbanks have become dumping grounds for plastic, religious offerings, and municipal waste. A significant amount of garbage is regularly removed from the Yamuna, highlighting the scale of this problem.
- Microplastics: A recent study by The Energy and Resources Institute (TERI) has identified microplastic contamination as a growing concern in the Yamuna, with multiple hotspots identified along the Delhi stretch.
- Ammonia: Ammonia levels in the Yamuna have been alarmingly high, often exceeding safe limits. This pollution can disrupt water supply as treatment plants have capacity limitations for ammonia-laden water.
Impact of Pollution
- Ecological Damage: Severe decline in the river's dissolved oxygen levels, creating "dead zones" incapable of supporting aquatic life.
- Health Concerns: Poses risks to public health, as it is a source of water for millions. Elevated ammonia levels, in particular, can disrupt water treatment processes and impact drinking water supply.
- Frothing: Surfactants from detergents entering the river unchecked, along with other pollutants, contribute to the visible frothing observed in the Yamuna.
Government Initiatives and Future Prospects
- Action Plans: The Delhi government has launched comprehensive action plans, including a 45-point plan with a significant budget, aimed at overhauling water infrastructure, upgrading sewerage networks, and treating drains.
- STP Upgradation: There is a focus on constructing and upgrading Sewage Treatment Plants (STPs) to prevent untreated sewage from entering the river.
- Monitoring and Research: Studies are being conducted to identify pollution hotspots and monitor water quality. TERI's recent study has provided a roadmap for tackling microplastics and other pollutants, emphasizing the need for integrated action on sewage, industries, and waste management.
- Inter-state Cooperation: Addressing the pollution requires collaborative efforts between states, particularly concerning issues like ammonia discharge.
Despite these efforts, challenges remain due to fragmented governance, weak enforcement, and the sheer scale of pollution. However, there is
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