Delhi-NCR GRAP IV Reimposed: Vehicle Rules And Severe Air Quality

Delhi-NCR air quality has again crossed the 'severe+' line, with the Air Quality Index moving beyond 450. This level activates GRAP Stage IV, which is the strictest set of emergency steps. Authorities say these measures aim to limit further spikes while basic movement and services continue.

The Commission for Air Quality Management reimposed GRAP-IV on Saturday across Delhi-NCR. This followed the return of GRAP-III just one day earlier as a precaution. GRAP-IV had been withdrawn in late December, but the region has faced stubborn pollution for several months, forcing fresh curbs.

Delhi-NCR air quality and GRAP-IV rules for vehicles

Under Stage IV, private vehicles are not fully banned in Delhi-NCR. Restrictions depend on fuel type and emission standards. Vehicles that meet current norms can run, but older ones face harder limits. BS-III petrol and BS-IV diesel vehicles cannot operate, except when used for essential services.

The commission stated that rules under Stage I, Stage II and Stage III remain active. These continue as per the modified GRAP issued on November 21, 2025. Together with Stage IV, they form a graded response. The aim is to handle Delhi-NCR air quality when pollution touches the 'severe+' band.

The latest move signals another tight clampdown on emissions in Delhi-NCR, especially from older vehicles. With GRAP Stages I to IV in force together, authorities are relying on the graded plan to manage the severe air situation, while still allowing essential activities to function.