The Commission for Air Quality Management (CAQM) has reimposed the strictest Graded Response Action Plan (GRAP) Stage 4 restrictions in Delhi-National Capital Region. The decision was taken late on Monday as the region's air quality worsened to the "severe" category.

Delhi-NCR enters Stage-IV GRAP as air quality hits 'severe'. Construction halts, industries face curbs, and residents are urged to limit outdoor exposure.

A Central air quality panel for Delhi-NCR invoked GRAP III on Monday afternoon following a sharp rise in pollution levels. The national capital recorded a minimum temperature of 4.5 degrees Celsius on Monday morning while the AQI dipped to the 'very poor' category — reaching 367 by 2 pm.

GRAP was activated for the first time in Delhi in October this year when air quality crossed the 300-degree mark. As the city is shrouded in smog, these actions aim to reduce the negative impact of air pollution on public health and the environment.

Delhi's 24-hour average air quality index, which was 379 at 4 pm, breached the 400 mark around 10 pm amid extremely calm winds and "buildup of an inversion layer adversely affecting the vertical mixing height".

GRAP-4 was enforced in Delhi in November due to high pollution, but on December 5, the SC allowed the CAQM to relax it to Stage 2 as air quality improved.

Delhi's air quality plummeted, triggering the implementation of GRAP Stage-IV ('Severe+') restrictions across the NCR. The AQI soared past 400, prompting an emergency CAQM meeting. Schools have responded by reverting to hybrid learning for students up to Class V,

The Centre's air quality panel for Delhi-NCR on Monday invoked restrictive measures under Stage-IV of the air pollution control plan amid a sharp dip in air quality due to unfavourable meteorological conditions.

The fourth stage restrictions have been invoked hours after the air quality panel imposed GRAP III curbs in the national capital. The curbs under Stage 4 of the Graded Response Ac

Delhi's air quality deteriorated further during the day, breaching the 400 mark, forcing the Central Air Quality Management (CAQM), the anti-pollution panel, to impose GRAP 4 restrictions.

CAQM invokes Stage III of GRAP as Delhi's air quality worsens, imposing restrictions to prevent further deterioration.