Three out of four households in Delhi-NCR are already facing the adverse effects of polluted air , with common symptoms including sore throat, coughing, eye irritation, headaches, and disrupted sleep, according to an online survey conducted by the citizen engagement platform LocalCircles.

An analysis of CPCB data revealed that after Diwali , PM2.5 concentrations surged to 488 micrograms per cubic metre, the highest in five years and more than three times the pre-festival level of 156.6 micrograms per cubic metre.

Pollution levels reached their peak on Diwali night, October 20, and the following morning.

The survey, based on over 44,000 responses from residents across Delhi, Gurugram, Noida, Faridabad, and Ghaziabad, found that 42 per cent of the households reported that one or more

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