Delhi's Smog Is Back, and Its Early Winter Plan Is Already Being Tested

Delhi's grey haze is back, and so is that familiar smoky smell. Days after the city's Winter Action Plan took effect on 1 November, residents are already rubbing irritated eyes and struggling to breathe. Air purifiers are humming indoors again, and masks are back on faces outdoors.

The plan, which runs through 28 February, arrived months ahead of the worst smog — a first, and one experts have welcomed. It blocks older, out-of-state vehicles from entering Delhi, denies fuel to cars without valid emission certificates, and temporarily bans dust-generating demolition and outdoor construction. Offices are being nudged to send half their staff home, parking charges have doubled, and staggered timings are in for government employees.

Separately, the federal Commission for Air Quality Management is running its Graded Response Action Plan, which tightens restrictions in stages as pollution climbs. Stage two is currently in force, curbing diesel generators and the burning of coal and firewood. Experts say the combined playbook looks solid on paper, but that execution is the weak link. According to Parthaa Bosu, strategic adviser at the Environmental Defense Fund, planning has improved while enforcement has stayed roughly where it was.

Others argue the fix has to go much wider than vehicle entry, construction dust and stubble burning. Manoj Kumar, an analyst at the Centre for Research on Energy and Clean Air, says every sector — power generation, industry, transport — needs its own emissions target. Bosu adds that secondary pollutants, formed when gases react with sunlight and water vapour, plus brick kilns and urban waste burning, are being overlooked. Pollution drifting in from neighbouring states also means Delhi can only do so much alone, he says.

The health stakes are brutal. Delhi's monitoring stations routinely log Air Quality Index readings above 300 in winter, and on the worst days hit 500 — the top of India's domestic scale, which doesn't mean the air can't get worse. International trackers such as IQAir have recorded readings near 1,000. The World Health Organization says 24-hour average PM2.5 levels should stay under 15 micrograms per cubic metre, yet Delhi often runs more than 25 times that during pollution season.

Dr Manoj Goel, who heads the pulmonology unit at Fortis Memorial Research Institute near Delhi, warns those fine particles slip deep into the lungs and into the bloodstream, inflaming organs and worsening existing heart and lung conditions. A 2025 Energy Policy Institute at the University of Chicago report estimated pollution could shave up to 8.2 years off life expectancy in the city. Meanwhile, border checks meant to screen vehicles are leaving commuters crawling between Delhi and satellite towns like Noida and Gurugram for hours. Teacher Meenu Rana, 43, has her purifiers ready and her curtains drawn — and no plans to leave. 'What option do we have?' she says. 'It is unfair but we will have to live with it.'