Delhi was ranked the sixth most polluted city in the country in October, while neighbouring Ghaziabad bagged the third spot and Noida the fourth, the Monthly Ambient Air Quality Snapshot released by the Centre for Research on Energy and Clean Air (CREA) revealed on Tuesday.

Delhi ranked sixth with an average concentration of 107 µg/m³, three times higher than its September average of 36 µg/m³. “Despite stubble burning contributing less than 6% of Delhi’s PM2.5 levels in October, the sharp rise highlights the impact of year-round emission sources and the need for long-term mitigation plans beyond short seasonal measures like the Graded Response Action Plan,” the report stated.

Dharuhera in Haryana was ranked as the most polluted city last month, with a monthly average PM2.5 concentration

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