Delhi woke up to a thick layer of fog and worsening air quality on Thursday, with the Air Quality Index (AQI) recorded in the ‘very poor’ category at 340, according to the Central Pollution Control Board (CPCB).

Restrictions under stages 1, 2 and 3 would remain in force to prevent any deterioration of air quality, the CAQM said.

"Actions under Stage I, II, and III of the revised GRAP shall remain invoked and be implemented, monitored, and reviewed by all the agencies concerned in the entire NCR to ensure

The Commission for Air Quality Management (CAQM) in the National Capital Region (NCR) and adjoining areas revoked Stage IV restrictions under the Graded Response Action Plan (GRAP) on Tuesday, following a notable decline in pollution levels.

Stage 4 GRAP measures had been in force across NCR since December 16, following a sharp deterioration in air quality.

The decision comes after Delhi's Air Quality Index (AQI) improved to 369 ('Very Poor') at 4 PM on December 24, down from a peak of 401 ('Severe') recorded on December 16.

Stage IV measures were initially invoked after the directions issued by the Supreme Court when AQI levels breached the 400 mark on December 16. The measures were aimed at curbing severe pollution levels and included restrictions on industrial activities,

NCR's air quality on Tuesday (December 24, 2024) revoked Stage IV curbs under the Graded Response Action Plan amid a dip in pollution levels, according to an official order. Delhi's air pollution levels showed a declining trend on Tuesday and the 24-hour average Air Quality Index (AQI) stood at 369 at 4 p.