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.

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.

The Commission for Air Quality Management (CAQM) revoked Stage 4 of the Graded Response Action Plan (GRAP) across NCR. However, measures under Stages 1, 2 and 3 will remain in force to manage pollution levels.

The Central Government's air quality monitoring body has repealed Stage IV ('Severe+') Graded Response Action Plan (GRAP) measures in Delhi and the National Capital Region (NCR) due to improved air quality.

Delhi`s air quality shows improvement, leading to the revocation of Stage IV curbs under the GRAP. AQI levels are declining, and further improvement is predicted.

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

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

During winters, the Delhi-NCR region enforces restrictions under GRAP, which categorises air quality into four stages -- Stage I (poor, AQI 201-300), Stage II (very poor, AQI 301-400), Stage III (severe, AQI 401-450), and Stage IV (severe plus, AQI above 450).

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,