Over the past five days, thousands of dead fish have surfaced in the Najafgarh drain, which is known as one of Delhi's most polluted stormwater drains that feeds into the Yamuna River. Villagers from Rawta village have reported that the water has turned darker and emitted a strong odor, likely due to industrial effluents released from the Haryana side. Ravi Phalswal, a local farmer, noted that the stench is noticeable and that the dead fish are even appearing in nearby fields due to high groundwater levels. This incident echoes previous occurrences, such as in July 2022, when fish deaths were attributed to toxic sediment rising due to heavy rainfall and untreated waste. Data from Delhi's environment department indicates that the Najafgarh drain contributes 68.71% of the wastewater entering the Yamuna, with experts suggesting that the recent rise in temperature and increased effluent concentration have led to a significant drop in dissolved oxygen levels, which is detrimental to aquatic life. A March analysis revealed that the biological oxygen demand (BOD) in the Najafgarh drain was 60 mg/l, exceeding the safe limit. Despite the alarming situation, officials from the Delhi Pollution Control Committee have not yet commented on the recent fish deaths.