Yamuna River Pollution Shows Alarming Increase in March
According to the latest monthly analysis from the Delhi Pollution Control Committee (DPCC), pollution levels in the Yamuna River experienced a significant surge this March compared to February. While the water quality remains better than it was during the same period last year, the recent spike has raised serious environmental concerns.
Sharp Rise in Fecal Coliform Levels
The DPCC report reveals that peak fecal coliform levels at Asgarpur reached 400,000 MPN/100 ml in March, representing nearly four times the concentration recorded in February. However, this figure remains substantially lower than the alarming 1,300,000 MPN/100 ml documented in March 2025. The safe limit for fecal coliform, which indicates untreated sewage presence, is 2,500 MPN/100 ml, with the desired level being below 500 MPN/100 ml.
Pollution Hotspots Remain Consistent
The pattern and locations of pollution spikes continue to follow established trends, with significant increases observed at the ISBT bridge following the confluence of the Najafgarh drain. This single drain accounts for more than 80% of the river's pollution within Delhi's boundaries. Further downstream, pollution levels rise again at the Okhla barrage.
The most dramatic pollution increase occurs between Wazirabad and the ISBT bridge, precisely where the Najafgarh drain merges with the Yamuna. At Wazirabad, fecal coliform levels measured 4,300 MPN/100 ml, but this skyrocketed to 160,000 units at the ISBT bridge—representing a staggering 37-fold increase in pollution load.
Multiple Water Quality Parameters Deteriorate
The DPCC analysis documented significant increases in several critical water quality indicators between these two locations:
- Ammoniacal nitrogen levels rose substantially
- Biochemical oxygen demand (BOD) increased, indicating higher oxygen requirements for decomposing biological matter
- Chemical oxygen demand (COD) showed marked elevation
- Dissolved oxygen (DO) levels changed significantly
Dissolved oxygen serves as a crucial indicator of aquatic life sustainability in rivers, with levels above 5 mg/l considered necessary for healthy ecosystems. For bathing standards, BOD levels must not exceed 3 mg/l. The best dissolved oxygen reading this March was recorded at Palla, where the river enters Delhi, measuring just 4 mg/l.
Environmental Activists Question Reported Improvements
Environmental advocates have expressed skepticism about the reported year-over-year improvement. "If we examine the Najafgarh drain specifically, the BOD was 65 in February and 60 in March, suggesting a slight reduction in pollution load," noted Pankaj Kumar, an environmental activist with Earth Warrior. "Yet the data clearly demonstrates that the river is far more polluted now than it was in February."
Bhim Singh Rawat from the South Asia Network on Dams, Rivers and People (SANDRP) offered a stark assessment: "DPCC's latest monthly Yamuna water quality test report only reconfirms that a great river continues to be ecologically dead and functions essentially as a toxic sewage canal. The water is completely unfit for any kind of use, presenting grave health implications for the population."
Rawat further emphasized that fecal coliform levels are six times higher even at Palla, indicating that untreated effluents are entering from Haryana and contaminating Delhi's potable water supply. "This overall situation underscores the abysmal failure of pollution prevention and control mechanisms, as fundamental flaws continue to plague the city's treatment infrastructure," he added.
The activist also noted that the river's flow remains nearly identical to last year's levels, effectively ruling out any water quality improvement due to dilution effects. This persistent pollution crisis highlights ongoing challenges in river management and environmental protection efforts in the National Capital Region.
