Supreme Court Questions GRAP-Style Curbs on Vehicles and Construction as Delhi Air Turns Severe
On 6 November 2026, a three-judge Bench of the Supreme Court headed by the Chief Justice of India called measures like stopping vehicles and stopping construction "old, tried and failed tools" for fighting Delhi's air pollution.
The Bench asked the Union government and the Commission for Air Quality Management (CAQM) whether they had any "significant scientific method" other than these two steps.
The Additional Solicitor General, appearing for the Centre and the CAQM, said emergency and advance measures under the Graded Response Action Plan (GRAP) cannot be called a complete failure, because they have at least kept pollution from rising further.
The court noted that the Air Quality Index (AQI) was touching 400. A few hours later, Delhi-NCR moved to GRAP Stage III restrictions as the AQI rose above 400.
The Bench said the heavy commercialisation of festivals, and the flood of vehicles entering Delhi from other states, have worsened pollution. It said the poorest people, who pollute the least, suffer the most. It suggested public awareness and a shift in public behaviour as part of the answer.
The court agreed to pass directions and listed the case for hearing after its Deepavali vacation.
Commission for Air Quality Management (CAQM)
The Commission for Air Quality Management in National Capital Region and Adjoining Areas (CAQM) is a statutory body, which means a body created by a law of Parliament. It manages air pollution in Delhi-NCR and the nearby areas of Haryana, Punjab, Rajasthan and Uttar Pradesh. Its orders override those of other pollution bodies in this region. One of its main jobs is to run the Graded Response Action Plan (GRAP), a ready list of curbs that become stricter as the air gets worse.
The Supreme Court's sharp question was aimed at the CAQM and at GRAP itself. The court asked whether stopping vehicles and construction, the core of GRAP's emergency stages, is enough. The government's reply was that GRAP keeps pollution from getting worse, which shows GRAP is a damage-control tool, not a long-term cure.
Air Quality Index (AQI) Framework
The Air Quality Index (AQI) is a single number, from 0 to 500, that tells people how clean or polluted the air is. It turns readings of several pollutants into one number, one colour and one word, such as "Good" or "Severe". The higher the number, the worse the air. In India, the National AQI is run by the Central Pollution Control Board (CPCB).
The court pointed out that Delhi's AQI was touching 400, and one judge said "Very Poor" has become normal for the city. Within hours, the AQI crossed 400 into the "Severe" band, which is exactly what moved Delhi-NCR into GRAP Stage III.
Article 21 and the Right to a Clean Environment
Article 21 of the Constitution says no person shall be deprived of life or personal liberty except according to procedure established by law. The Supreme Court has read "life" to mean a life with dignity, which includes the right to clean air, clean water and a healthy environment. This is why citizens and courts can treat severe air pollution as a question of Fundamental Rights, and not just a matter of government policy.
The Delhi air pollution case is one of the clearest examples of the Supreme Court acting to protect the Article 21 right to clean air. In this hearing the Bench also stressed that people who pollute the least, such as those who walk or cycle, suffer the most. It said court orders alone cannot clean the air without a public movement, and an amicus curiae assisted the court in the case.
- Hearing date: 6 November 2026; three-judge Bench headed by the Chief Justice of India
- Court's phrase for stopping vehicles and construction: "old, tried and failed tools"
- Delhi-NCR moved to GRAP Stage III on 6 November 2026 as AQI crossed 400
- GRAP stages: I (AQI 201 to 300), II (301 to 400), III (401 to 450), IV (above 450)
- GRAP first notified: January 2017 (Union Environment Ministry); now enforced by CAQM
- CAQM: ordinance October 2020; Act of Parliament 2021; replaced EPCA (1998)
- National AQI: launched October 2014; 8 pollutants; 6 categories; scale 0 to 500
- Subhash Kumar v. State of Bihar (1991): right to pollution-free air and water is part of Article 21
- Articles 48A and 51A(g): added by the 42nd Amendment Act, 1976