Yamuna Faecal Coliform Levels Hit 350,000 Units, DPCC Data Confirms Severe Pollution

The Yamuna River in Delhi continues to suffer from severe pollution, with the latest Delhi Pollution Control Committee (DPCC) reports for January and February 2026 revealing alarmingly high levels of faecal coliform and elevated Biological Oxygen Demand (BOD). The data, uploaded following delays that sparked public speculation, indicate persistent contamination primarily from untreated sewage discharge into the river.

Faecal coliform levels, a key indicator of faecal pollution and potential health risks from pathogens, reached a peak of 350,000 units per 100 ml in the recent months. These figures reflect significant bacterial contamination, far exceeding safe limits for bathing or other human contact, and highlight ongoing failures in sewage treatment infrastructure along the river's stretch through the capital.

The reports also show high BOD values, which measure the amount of dissolved oxygen required by microorganisms to decompose organic matter in the water. Elevated BOD levels signify heavy organic pollution that depletes oxygen available for aquatic life, contributing to the river's near-dead state in many sections. While January 2026 readings marked a sharp rise compared to December 2025, they remained lower than those recorded in January 2025, suggesting some seasonal or short-term fluctuations but no sustained improvement.

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DPCC monitors Yamuna water quality at eight strategic locations across Delhi, testing parameters including BOD, dissolved oxygen, chemical oxygen demand, pH, and faecal coliform. Samples are collected regularly to assess pollution trends and compliance with environmental standards. The consistent presence of high faecal coliform and BOD underscores the river's classification as unfit for most beneficial uses, including drinking, bathing, or supporting diverse aquatic ecosystems.

The delayed release of these reports drew criticism from environmental groups and citizens, who questioned transparency in pollution monitoring amid repeated government claims of cleanup efforts. Initiatives such as the Namami Gange programme and local sewage treatment plant upgrades have aimed to reduce inflows of untreated waste, yet the latest data indicate limited progress in curbing pollution loads from urban drains and industrial outlets.

The persistent degradation of the Yamuna remains a major environmental and public health concern for Delhi residents, who rely on the river for various purposes despite its deteriorated state. Authorities face continued pressure to enforce stricter effluent standards, expand treatment capacity, and address encroachments to prevent further ecological damage and safeguard downstream communities dependent on the river system.

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