Air pollution levels in Delhi and the National Capital Region have sharply deteriorated, pushing the Air Quality Index into the &lsquo;severe plus&rsquo; category and triggering the imposition of the most stringent pollution control measures under Stage IV of the Graded Response Action Plan (GRAP).
Authorities said the AQI crossed the 450 mark in several monitoring stations, indicating hazardous air conditions that pose serious health risks even to healthy individuals, while children, the elderly and those with respiratory ailments remain especially vulnerable. In response, the Commission for Air Quality Management ordered immediate implementation of Stage IV restrictions across the region.
Under GRAP IV, most construction and demolition activities have been halted, barring projects deemed essential. Movement of certain commercial vehicles has been restricted, and operations of non-essential industrial units using high-polluting fuels are being curtailed. Offices have been advised to reduce on-site staff by encouraging work-from-home arrangements, while educational institutions may shift to online or hybrid classes depending on local conditions.
Officials attributed the sudden spike in pollution to a combination of stagnant weather conditions, low wind speeds and increased accumulation of particulate matter. Dense smog has enveloped parts of the capital, significantly reducing visibility and aggravating respiratory discomfort among residents.
Environmental authorities said the situation is being closely monitored, with daily assessments of air quality and weather forecasts guiding further action. Health advisories have urged residents to limit outdoor activity, use masks where necessary and seek medical attention if symptoms such as breathlessness or eye irritation worsen.
The enforcement of GRAP IV reflects the severity of the ongoing pollution episode and highlights the recurring challenge faced by Delhi-NCR each winter. Officials reiterated that strict compliance with restrictions by industries, construction agencies and the public is crucial to prevent further deterioration and to bring pollution levels under control in the coming days.

Delhi-NCR Air Turns Severe Plus, GRAP IV On

Toughest curbs imposed as air quality plunges, AQI crosses hazardous levels

Delhi-NCR Air Turns Severe Plus, GRAP IV On

Toughest curbs imposed as air quality plunges, AQI crosses hazardous levels

December 13, 2025 | 15:10 IST