Delhi witnessed a substantial improvement in its air quality following two days of sustained rainfall, which helped bring the capital’s Air Quality Index (AQI) down to 60 on Friday. This reading, categorized as 'Satisfactory', marks the cleanest air recorded in the city since October 10, 2022. The sudden clearing of the smog has provided a brief but welcome respite for residents who often face hazardous conditions during the transition into winter.
Minister Manjinder Singh Sirsa expressed optimism regarding the development, attributing the cleaner air to the government’s "targeted action" and public cooperation. Sharing images of India Gate on social media, Sirsa remarked that the "Satisfactory" AQI was proof that government interventions were delivering tangible results. He specifically noted the efforts under the leadership of Chief Minister Rekha Gupta and emphasized the importance of "Jan Bhagidari," or public participation, in the ongoing mission to mitigate urban pollution.
Despite the official stance, data provided by the Centre for Research on Energy and Clean Air (CREA) suggests that meteorological factors were the primary drivers behind the change. According to reports, Delhi received 61.4mm of rainfall in the 24 hours leading up to Friday morning. This volume made it the wettest October day in four years and the sixth wettest October day since records began in 1951. Cumulatively, the city has recorded 123.3mm of rain this month, a figure more than eight times its monthly average of 15.1mm.
Analysts at CREA pointed out that the improvement in air quality aligned perfectly with these weather patterns. Manoj Kumar of the organization stated that while the government has implemented measures under the Graded Response Action Plan (GRAP), the AQI had already begun to decline before these specific restrictions were fully enforced. The reliance on such weather-dependent improvements complicates efforts to determine the long-term effectiveness of local anti-pollution policies versus natural atmospheric cleansing.
The broader data for the month reinforces the impact of the unusual weather. Delhi recorded an average AQI of 167 throughout October 2026, which stands as the lowest October average since 2015. For context, the average AQI in October 2025 was 223, while 2024 saw an average of 234. The highest AQI peak recorded this month was 245, occurring on October 21, which remains the lowest monthly peak for October since 2015.
In addition to the rainfall, the city experienced unseasonably cool conditions. On Friday, the maximum temperature at Safdarjung was recorded at 20.7 degrees Celsius, making it the coldest October day in terms of maximum temperature since 1951. This cooling, combined with the rain, likely prevented the accumulation of pollutants that typically plague the capital during this season.
Moving forward, the government maintains its commitment to anti-pollution measures, balancing its narrative of administrative success with the undeniable influence of the record-breaking rainfall. While the air remains breathable for now, experts caution that as the meteorological impact of the recent storms wanes, the efficacy of the GRAP and other long-term environmental policies will be put to the test in the coming weeks. For the citizens of Delhi, the current conditions serve as a reminder of the delicate relationship between the city's environment and the changing climate.
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