Residents in Delhi and the National Capital Region (NCR) are currently facing a dual environmental challenge as toxic foam has been observed accumulating on the Yamuna River. The appearance of this white, chemical-laden froth is a recurring issue often linked to industrial waste discharge and untreated sewage entering the river system, particularly during periods of low water flow.

Concurrent with the river pollution, air quality in the region has deteriorated significantly. According to the Commission for Air Quality Management (CAQM), the air quality index has slipped into the 'unhealthy' category. In response to these rising pollution levels, authorities officially invoked Stage 1 of the Graded Response Action Plan (GRAP) on October 21. This regulatory framework mandates a series of restrictions aimed at curbing emissions, including bans on certain types of construction activities, the regulation of coal and firewood usage, and increased mechanical sweeping of roads.

While the CAQM has implemented these measures to mitigate the impact of the poor air quality, the persistence of the foam on the Yamuna highlights ongoing difficulties in managing water and air pollution in the capital. Environmental experts often point to the intersection of industrial runoff and seasonal weather patterns as the primary drivers for these recurring environmental hazards.