Delhi AQI hits 'hazardous' 451 ahead of Diwali; GRAP-II curbs imposed across NCR

The latest readings from the Delhi Pollution Control Board show the capital's air quality index climbing to 451, a level classified as hazardous by health experts. Neighborhoods such as Rohini, Punjabi Bagh and Bawana recorded figures that exceed 400, indicating severe smog and particulate matter concentration. The spike comes just days before Diwali, a festival known for large-scale fireworks displays that add to the already heavy load of pollutants from vehicular emissions, stubble burning in neighboring states and winter weather conditions that trap dust close to the ground.

In response, the state government has moved to Stage II of the Graded Response Action Plan, a set of measures designed to reduce emissions quickly. The plan includes a ban on the movement of heavy diesel vehicles on major arteries, a temporary halt to construction activities that generate dust, and a restriction on the operation of certain small and medium industries that emit high levels of sulphur dioxide and nitrogen oxides. Schools in the most affected zones have been advised to keep children indoors, and public transport has been encouraged through increased frequency of buses and metro services to limit private car use.

Health officials warn that prolonged exposure to such high pollution levels can aggravate respiratory illnesses, increase hospital admissions and pose a serious risk to vulnerable groups such as the elderly and children. Residents have been urged to wear masks, limit outdoor activities and use air purifiers where possible. The situation underscores the need for coordinated action across states to manage agricultural burning and for stricter enforcement of emission standards, issues that remain central to India's broader public health and environmental agenda.