New Delhi woke to a thick blanket of smog on Monday, 9 November 2026, a day after Diwali celebrations, as the city's average Air Quality Index (AQI) climbed to 376 — firmly in the 'Very Poor' category, according to the Central Pollution Control Board's (CPCB) Sameer application. Residents across the national capital raised alarm over deteriorating visibility and health risks, pointing to a combination of firecrackers, stubble burning in neighbouring states, and cross-border pollution as the primary drivers.

Smog So Dense the Sun Disappeared

The severity of the post-Diwali pollution was starkly evident to those on the streets. An elderly resident described the conditions as alarming, noting that even sunlight was barely penetrating the smog. 'Pollution levels in Delhi are extremely high. I have noticed that even the Sun is not clearly visible. This is wrong, and stubble burning in Punjab, Uttar Pradesh, Haryana and other areas is contributing to the high pollution levels here,' the resident said.

Dense smog covered several parts of the capital during the morning hours, significantly reducing visibility and prompting widespread concern among commuters, parents, and healthcare workers.

Firecracker Violations and Court Orders Ignored

Beyond stubble burning, residents alleged that Diwali revellers in Delhi flouted both Supreme Court guidelines on firecracker timing and a Delhi High Court-issued high alert. 'Despite this, people living here did not pay much attention or take precautions. Instead, they contributed to increasing pollution as much as possible by bursting crackers far beyond the prescribed timeline by the Supreme Court, right into the wee hours of Monday,' one resident said.

The allegations reflect a recurring pattern — court-mandated restrictions on fireworks have consistently been difficult to enforce across the city, with complaints of violations surfacing each year in the post-Diwali period.

Vulnerable Groups at Heightened Risk

Health concerns dominated community conversations, with multiple residents urging special care for children, the elderly, and those with pre-existing respiratory conditions. 'I would like to urge the people of Delhi to please take care of children and the elderly. Those who suffer from asthma and young children, whose lungs are very delicate, are particularly vulnerable,' one local appealed.

Doctors and public health advocates have long flagged that post-Diwali AQI spikes carry disproportionate risk for people with asthma, chronic obstructive pulmonary disease (COPD), and cardiovascular conditions. An AQI above 300 is classified as 'Very Poor', with the CPCB recommending that sensitive groups avoid all outdoor exposure.

Multi-State Pollution Cocktail

Residents and experts alike noted that Delhi's air crisis is never purely local. Stubble burning in Punjab, Haryana, and Uttar Pradesh — a seasonal agricultural practice that peaks in October and November — typically accounts for a significant share of particulate matter in the capital's air during this period, compounding the effect of local firecracker emissions. This is a pattern that has repeated itself each post-Diwali season for well over a decade, despite successive government interventions including Graded Response Action Plan (GRAP) activations and crop residue management schemes.

What Comes Next

With AQI levels in the 'Very Poor' range, authorities are expected to enforce stricter GRAP measures, potentially including restrictions on construction activity, diesel generator use, and certain categories of vehicles. Residents have been urged to wear masks outdoors, keep windows shut, and use air purifiers where available. Whether enforcement tightens sufficiently to prevent a further slide into the 'Severe' or 'Severe+' category will be closely watched in the coming days.