The Commission for Air Quality Management (CAQM) in Delhi-NCR has lifted the restrictions imposed under Stage-IV of the Graded Response Action Plan (GRAP) with immediate effect. The decision was made on Wednesday, December 24, 2025, after observing a significant improvement in the air quality of Delhi. However, the restrictions under Stages I, II, and III of GRAP will remain in place.

The enforcement of GRAP Stage IV had been implemented in response to the deteriorating air quality in Delhi, with the Air Quality Index (AQI) reaching the "Severe+" category. On December 13, 2025, the city was blanketed in thick smog, causing visibility to drop sharply and AQI readings to soar above 600 in some areas. The severe pollution prompted authorities to enforce the strictest measures under GRAP to curb further deterioration.

GRAP Stage IV includes a complete halt on construction projects, restrictions on the entry of non-essential trucks, potential school closures, implementation of remote working policies, and the possibility of an odd-even vehicle scheme. Additional restrictions included a ban on construction and demolition activities, the shutdown of polluting industries, and limitations on diesel vehicles. The entry of medium and heavy goods vehicles running on diesel was restricted, with exceptions for essential commodities. BS-III petrol and BS-IV diesel vehicles were also barred.

The CAQM's decision to revoke Stage IV restrictions came as a result of improved air quality due to high winds and favorable meteorological conditions. Data from the Central Pollution Control Board (CPCB) indicated that several areas, such as ITO and India Gate, still recorded AQI levels above 350, which is in the "very poor" category. Despite the revocation of Stage IV, the CAQM has clarified that measures under Stages I, II, and III will continue to be implemented. These stages include measures such as dust suppression at construction sites, promotion of carpooling and public transport, a ban on waste burning, and monitoring of industrial emissions.

The Delhi High Court has also taken note of the air pollution situation, questioning the central government about the 18% GST imposed on air purifiers. The court emphasized that every citizen is entitled to clean air and directed the GST Council to convene and consider lowering the GST on air purifiers.

GRAP is a critical tool used to combat Delhi-NCR's persistent air pollution. The plan classifies air quality into different stages based on AQI levels, with corresponding actions for each stage. The responsibility of achieving cleaner air lies with governments, industries, and individuals. The implementation of GRAP has led to reduced respiratory illnesses, temporary economic disruptions, and increased environmental consciousness.